Valves & Tank Equipment

VALVES & TANK EQUIPMENT

SAFETY PRODUCTS THAT PROTECT EQUIPMENT, LIVES & THE ENVIRONMENT

TABLE OF CONTENTS

1201B, 1202B, 1203A

1220A, 1221B, 1222B, 1223B

ADDITIONAL GROTH PRODUCTS

MODEL 1200A

• Sizes // 2" through 12"

• Pressure settings // 0.5 oz/in2 to 15 psig

• Vacuum settings // 0.5 oz/in2 to 12 psig

• Available in aluminum, carbon steel, stainless steel, fiberglass and other materials

• Modular construction

PRESSURE/VACUUM RELIEF VALVE

Model 1200A is designed to protect your tank from damage created by overpressure or excessive vacuum. Costly product evaporation losses due to normal tank “breathing” are greatly reduced. Because the Model 1200A retains toxic vapors, atmospheric contamination is minimized. This helps to provide increased fire protection and safety.

SPECIAL FEATURES

Model 1200A offers Groth’s special “cushioned air” seating. Superior performing fluoropolymer seating diaphragms are standard to minimize sticking caused by resinous vapors and atmospheric moisture. The Model 1200A has a self draining housing body and drip rings to protect seating surfaces from condensate and freezing. This design also avoids dangerous pressure or vacuum buildup due to binding or clogging of the valve. Buna-N, FKM and other seating diaphragms can be provided when required. To insure the proper alignment of seating surfaces, there is peripheral guiding and a center stabilizing system.

MODEL 1200A

MODEL 1201B

SPECIFICATIONS

Specifications subject to change without notice. Certified dimensions available upon request.

2"12oz/in213.63"14"9.50"13.37"19.87"9.50"16 (50mm)(52.7gm/cm2)(346mm)(355mm)(241mm)(340mm)(505mm)(241mm)(7kg)

3"11oz/in218"15"11.50"18.37"22.75"13"21 (80mm)(48.3gm/cm2)(457mm)(381mm)(292mm)(467mm)(578mm)(330mm)(9kg)

4"11oz/in219.75"17.50"13"19.50"27.50"13"31 (100mm)(48.3gm/cm2)(502mm)(444mm)(330mm)(495mm)(699mm)(330mm)(14kg)

6"16oz/in227.75"22.25"19"27.75"37.75"19.50"57 (150mm)(70.3gm/cm2)(704mm)(565mm)(483mm)(705mm)(959mm)(495mm)(26kg) 8"16oz/in233.88"27.50"23.63"33.62"44.50"23.50"75 (200mm)(70.3gm/cm2)(860mm)(699mm)(600mm)(854mm)(1130mm)(597mm)(34kg) 10"16oz/in

(300mm)(70.3gm/cm2)(1168mm)(835mm)(914mm)(1029mm)(1413mm)(648mm)(71kg)

† W.P. = Working Pressure. // ‡ On spring loaded valves, change model number.

◊ 150# ANSI drilling compatibility, F.F. on aluminum and R.F. on carbon steel and stainless steel alloys. Fiberglass dimensions on request. 16 oz/in2 set with spacer. SS set weights-consult factory. *Some sizes require non-ferrous components to achieve 0.5 oz/in2 setting. For easy ordering, select proper model numbers

• Include model number and setting when ordering.

• For special options, consult factory

• When ordering steam jacket, include steam pressure/temperature.

Stainless

MODEL 1200A/1202B // PRESSURE RELIEF CAPACITY

FLOW CAPACITY CALCULATION

Flow capacity values listed above are based on full open valves at 100% overpressure.

Read the flow capacity at 100% overpressure directly from the table above. Use linear interpolation if the set pressure is not listed.

If the allowable overpressure is less than 100%, modify the flow capacity using the appropriate “C” factor from the table. If allowable overpressure is more than 100%, consult your Groth Representative.

Calculate the percentage overpressure by the following formula. Note that all pressures are gauge pressure expressed in the same units of measure.

Pf = Flowing pressure

P s = Set pressure

% OP = [(Pf - Ps)/Ps] x 100

Calculate flow capacity at less than 100% overpressure according to the following example.

MODEL 1200A/1202B // PRESSURE RELIEF CAPACITY

MODEL 1220A FLOW CAPACITY CALCULATION

Flow capacity values listed above are based on full open valves at 100% overpressure.

Read the flow capacity at 100% overpressure directly from the table above. Use linear interpolation if the set pressure is not listed.

If the allowable overpressure is less than 100%, modify the flow capacity using the appropriate “C” factor from the table. If allowable overpressure is more than 100%, consult your Groth Representative.

Calculate the percentage overpressure by the following formula. Note that all pressures are gauge pressure expressed in the same units of measure.

Pf = Flowing pressure

P s = Set pressure

% OP = [(Pf - Ps)/Ps] x 100

Calculate flow capacity at less than 100% overpressure according to the following example.

MODEL 1200A/1201B // VACUUM RELIEF CAPACITY

0.870.504.7010.316.034.760.591.1129 1.000.585.0511.017.237.365.097.9138 1.731.006.6314.522.649.085.3129182 2.001.167.1215.624.252.691.6138195 2.601.508.1017.727.659.8104157222

3.001.738.7019.029.664.2112169238 3.462.009.3320.431.868.9120181256

4.002.3110.021.934.174.0129194274 6.003.4712.226.741.590.1157237334 8.004.6214.030.647.7103180272384 10.05.7815.634.053.0115200302427 12.06.9317.037.157.8125218329465 15.08.6618.841.164.0139242365516 20.011.621.446.872.9158276415587 25.014.423.651.580.3174304457646 30.017.325.455.686.6188327493697

Flow capacity values listed above are based on full open valves at 100% over-vacuum.

Read the flow capacity at 100% over-vacuum directly from the table above. Use linear interpolation if the set vacuum is not listed.

If the allowable over-vacuum is less than 100%, modify the flow capacity using the appropriate “C” factor from the table. If allowable over-vacuum is more than 100%, consult your Groth Representative.

Calculate the percentage over-vacuum by the following formula. Note that all pressures are gauge pressure expressed in the same units of measure.

Pf = Flowing pressure

P s = Set pressure

% OV = [(Pf - Ps)/Ps] x 100

Calculate flow capacity at less than 100% over-vacuum according to the following example.

MODEL 1200A/1201B // VACUUM RELIEF CAPACITY

222.160.130.290.450.981.712.583.65 504.900.200.440.681.482.583.885.48

Flow capacity values listed above are based on full open valves at 100% over-vacuum.

Read the flow capacity at 100% over-vacuum directly from the table above. Use linear interpolation if the set vacuum is not listed.

If the allowable over-vacuum is less than 100%, modify the flow capacity using the appropriate “C” factor from the table. If allowable over-vacuum is more than 100%, consult your Groth Representative.

Calculate the percentage over-vacuum by the following formula. Note that all pressures are gauge pressure expressed in the same units of measure.

Pf = Flowing pressure

P s = Set pressure

% OV = [(Pf - Ps)/Ps] x 100

Calculate flow capacity at less than 100% over-vacuum according to the following example.

MODEL 1201B/1203A // PRESSURE RELIEF CAPACITY

Flow capacity values listed above are based on full open valves at 100% overpressure.

Read the flow capacity at 100% overpressure directly from the table above. Use linear interpolation if the set pressure is not listed.

If the allowable overpressure is less than 100%, modify the flow capacity using the appropriate “C” factor from the table. If allowable overpressure is more than 100%, consult your Groth Representative.

Calculate the percentage overpressure by the following formula. Note that all pressures are gauge pressure expressed in the same units of measure.

Pf = Flowing pressure

P s = Set pressure

% OP = [(Pf - Ps)/Ps] x 100

Calculate flow capacity at less than 100% overpressure according to the following example.

MODEL 1201B/1203A // PRESSURE RELIEF CAPACITY

MODEL 1220A FLOW CAPACITY CALCULATION

Flow capacity values listed above are based on full open valves at 100% overpressure.

Read the flow capacity at 100% overpressure directly from the table above. Use linear interpolation if the set pressure is not listed.

If the allowable overpressure is less than 100%, modify the flow capacity using the appropriate “C” factor from the table. If allowable overpressure is more than 100%, consult your Groth Representative.

Calculate the percentage overpressure by the following formula. Note that all pressures are gauge pressure expressed in the same units of measure.

Pf = Flowing pressure

= Set pressure

Calculate flow capacity at less than 100% overpressure according to the following example.

MODEL 1202B/1203A // VACUUM RELIEF

MODEL 1220A FLOW CAPACITY CALCULATION

Flow capacity values listed above are based on full open valves at 100% over-vacuum.

Read the flow capacity at 100% over-vacuum directly from the table above. Use linear interpolation if the set pressure is not listed.

If the allowable over-vacuum is less than 100%, modify the flow capacity using the appropriate “C” factor from the table. If allowable over-vacuum is more than 100%, consult your Groth Representative.

Calculate the percentage over-vacuum by the following formula. Note that all pressures are gauge pressure expressed in the same units of measure.

Pf = Flowing pressure

P s = Set pressure

% OV = [(Pf - Ps)/Ps] x 100

Calculate flow capacity at less than 100% over-vacuum according to the following example.

MODEL 1202B/1203A // VACUUM RELIEF CAPACITY

Flow capacity values listed above are based on full open valves at 100% over-vacuum.

Read the flow capacity at 100% over-vacuum directly from the table above. Use linear interpolation if the set pressure is not listed.

If the allowable over-vacuum is less than 100%, modify the flow capacity using the appropriate “C” factor from the table. If allowable over-vacuum is more than 100%, consult your Groth Representative.

Calculate the percentage over-vacuum by the following formula. Note that all pressures are gauge pressure expressed in the same units of measure.

Pf = Flowing pressure

P s = Set pressure % OV = [(Pf - Ps)/Ps] x 100

Calculate flow capacity at less than 100% over-vacuum according to the following example.

SERIES 1800

• Sizes // 2" (DN 50) through 12" (DN 300) flange sizes

• Available in aluminum, carbon steel, stainless steel

• Stable full lift at 10% overpressure

• Modulating action

• Near zero blowdown (reseats near set pressure)

• Ability to achieve set pressure/vacuum very close to tank maximum allowable working pressure/vacuum

FULL LIFT PRESSURE/VACUUM RELIEF VALVE

The most notable advantage of the Groth Full Lift Type Valve Compared to Standard Pressure/ Vacuum Relief Valves is its’ ability to open at 10% overpressure while standard Pressure/Vacuum Relief Valves achieve full open capacity at 100% overpressure. The use of a Full Lift Type Valve allows the user to select the valve set pressure (vacuum) within 10% of the tank Maximum Allowable Working Pressure (vacuum). This is important because operation near the tank design pressure greatly reduces the breathing losses of the product in the tank.

WHAT IS A FULL LIFT TYPE VALVE?

A Full Lift Type Valve is a relief valve which attains full stable lift at only 10% overpressure. Like all Groth Pressure/Vacuum Relief Valves, the Full Lift Type Valve is a modulating valve which offers near zero blowdown, meaning it reseats near set pressure. These performance capabilities are possible due to the harmonization of the nozzle, seating, and pallet areas such that the valve will achieve stable lift at only 10% above the set pressure/vacuum.

BENEFITS

• Ability to operate process closer to Tank MAWP, increasing operating range of process

• Minimal seat leakage to prevent fugitive emission and conserve tank product

• Narrow valve operating range (from seal to full open) maximizes tank operating range and reduces total vapor emissions

• Stable lift ensures that the venting requirements of the process are reliably met

• Reduced seat leakage, low overpressure, and near zero blowdown characteristics to allow for process maintenance, minimal product loss and better tank corrosion maintenance

MODEL 1800

2″ 13.625” 13″ 9.5”

50 mm346 mm330 mm241 mm

3″ 18″ 13.625”11.5″

30 mm457 mm346 mm292 mm

4″ 19.75″ 15.875” 13″

100 mm503 mm403 mm130 mm

6″ 27.75″ 22.25″ 19″

150 mm704 mm565 mm482 mm

8″ 33.875”26.375”23.625”

200 mm860 mm669 mm600 mm

10″ 48.875”28.875”30.75”

250 mm1038 mm733 mm781 mm

12″ 46″ 32.875” 36″

300 mm1165 mm835 mm914 mm

2”14.25”12.625”7.5” 50 mm361 mm320 mm 191 mm

3”18”15.125”9” 30 mm457 mm384 mm 229 mm

4”19.25”18.25” 11” 100 mm 489 mm463 mm 279 mm

6”26.25”23.75”13.5” 150 mm 673 mm603 mm 343 mm

8”32.5”28.5”16” 200 mm 826 mm723 mm 406 mm

10”37.75”34.25”19” 250 mm 959 mm876 mm 483 mm

12”42.75”39.125”21” 300 mm 1086 mm 993 mm 533 mm

2”7”5.5” 50 mm178 mm140 mm 3”8.125”6” 30 mm206 mm152 mm

4”9.5”6.5” 100 mm241 mm165 mm

6”12.75”8.5” 150 mm324 mm216 mm

8”15.25”10.75” 200 mm387 mm273 mm

10”18”12.5” 250 mm457 mm318 mm

12”20.625”15”

300 mm524 mm381 mm

2”9.5”6.625” 50 mm241 mm168 mm

3”11.5”8.625” 30 mm292 mm219 mm

4”13”10.5625” 100 mm330 mm268 mm

6”19”15” 150 mm482 mm381 mm

8”23.625”16.625”

200 mm600 mm422 mm

10”30.75”17” 250 mm781 mm431 mm

12”36”18”

300 mm914 mm457 mm

MODEL 1860 MODEL 1810MODEL 1870

2”8.625”9.375”7.5”

50 mm219 mm238 mm191 mm

3”10”11.125”9”

30 mm254 mm282 mm229 mm

4” 11” 13.875” 11”

100 mm 279 mm352 mm279 mm

6”14.5”17.375”13.5”

150 mm 368 mm441 mm343 mm

8”18”21.25”16”

200 mm 457 mm539 mm406 mm

10”20.75”23.625”19”

250 mm 527 mm600 mm483 mm

12”24.75”26.625”21”

300 mm 629 mm676 mm533 mm

2”4.125”5.5”

50 mm105 mm140 mm

3”5”6” 30 mm127 mm152 mm

4”6.5”6.5”

100 mm165 mm165 mm

6”8.5”8.5”

150 mm216 mm216 mm

8”9.75”10.75”

200 mm248 mm273 mm

10”10.25”12.5”

250 mm260 mm318 mm

12” 11” 15”

300 mm279 mm381 mm

2”11.625”6.875”6” 50 mm295 mm174 mm152 mm

3”15.75”7.75”7.75” 30 mm400 mm196 mm197 mm

4”17.25”9.625”9” 100 mm438 mm244 mm229 mm

6”23.5”11.875”12” 150 mm597 mm301 mm305 mm

8”28.5”15.5”14.5” 200 mm724 mm393 mm368 mm

10”33.25”18.625”16.5” 250 mm845 mm473 mm419 mm

12”37.25”21.625”19” 300 mm946 mm549 mm483 mm

3”8.625”9.25”

4”10”11.5”

8”14.5”17.75” 200 mm368 mm451 mm

10”18”21.25” 250 mm457 mm539 mm

12”20.75”25.75” 300 mm527 mm654 mm

14”24.75”29.25” 350 mm629 mm742 mm

mm229 mm152 mm

6” 11” 6.5” 150 mm279 mm165 mm

8”13.5”8.5” 200 mm343 mm216 mm

10”16”10.75”

250 mm406 mm273 mm

12”19”12.5”

300 mm483 mm318 mm

14”21”15” 350 mm533 mm381 mm

MODEL

FlowCapacityat10%Overpressureand60°F[1000SCFH]

FlowCapacityat10%Overpressureand0°C[1000NCMH]

252.450.1020.2250.3880.881.522.403.44 504.900.1450.3180.5481.242.153.404.87 757.350.1770.3900.6711.522.644.165.96 1009.800.2040.4500.7751.763.054.806.89 12512.30.2280.5030.8671.973.415.377.70 15014.70.2500.5510.9492.153.735.888.43 20019.60.2890.6361.102.494.316.799.74 25024.50.3230.7111.222.784.817.5910.9 30029.40.3540.7791.343.045.278.3111.9 35034.30.3820.8411.453.295.698.9712.9

FlowCapacityat10%Over-Vacuumand60°F[1000SCFH] SetVacuumSize

252.450.0490.1100.1960.440.7801.221.76 504.900.0690.1550.2760.6201.101.732.48 757.350.0840.1900.3380.7601.352.113.04 1009.800.0970.2190.3890.8801.562.433.50 12512.30.1090.2450.4350.9801.742.723.91 15014.70.1190.2670.4751.071.902.974.28 20019.60.1370.3080.5471.232.193.424.93 25024.50.1530.3430.6101.372.443.815.49 30029.40.1670.3750.6701.502.674.176.00 35034.30.1790.4040.7201.622.874.496.46

MODEL 1820 // PRESSURE

FlowCapacityat10%Overpressureand60°F[1000SCFH]

757.350.1350.2980.5131.172.023.184.56 1009.800.1560.3440.5931.352.333.675.27 12512.30.1750.3850.6631.502.604.115.89 15014.70.1910.4220.7261.652.854.506.45 20019.60.2210.4870.8381.903.295.197.45 25024.50.2470.5440.9372.133.685.808.32 30029.40.2700.5961.032.334.036.369.12 35034.30.2920.6431.112.514.356.869.84

MODEL 1820 // VACUUM

FlowCapacityat10%Over-Vacuumand60°F[1000SCFH]

252.450.0490.1100.1960.4400.781.221.76 504.900.0690.1550.2760.6201.101.732.48 757.350.0840.1900.3380.7601.352.113.04 1009.800.0970.2190.3890.8801.562.433.50 12512.30.1090.2450.4350.9801.742.723.91 15014.70.1190.2670.4751.071.902.974.28 20019.60.1370.3080.5471.232.193.424.93 25024.50.1530.3430.6101.372.443.815.49 30029.40.1670.3750.6701.502.674.176.00 35034.30.1790.4040.7201.622.874.496.46

MODEL 1830 // PRESSURE

FlowCapacityat10%Overpressureand0°C[1000NCMH]

757.350.1770.3900.6711.522.644.165.96 1009.800.2040.4500.7751.763.054.806.89 12512.30.2280.5030.8671.973.415.377.70 15014.70.2500.5510.9492.153.735.888.43 20019.60.2890.6361.102.494.316.799.74 25024.50.3230.7111.222.784.817.5910.9 30029.40.3540.7791.343.045.278.3111.9 35034.30.3820.8411.453.295.698.9712.9

MODEL 1860 // PRESSURE

FlowCapacityat10%Overpressureand60°F[1000SCFH]

504.900.1110.2440.4190.9521.652.603.73 757.350.1350.2980.5131.172.023.184.56 1009.800.1560.3440.5931.352.333.675.27 12512.30.1750.3850.6631.502.604.115.89 15014.70.1910.4220.7261.652.854.506.45 20019.60.2210.4870.8381.903.295.197.45 25024.50.2470.5440.9372.133.685.808.32 30029.40.2700.5961.032.334.036.369.12 35034.30.2920.6431.112.514.356.869.84

MODEL 1810 // VACUUM

FlowCapacityat10%Over-Vacuumand60°F[1000SCFH]

13.98.06.2013.924.755.699.0154222

252.450.0490.1100.1960.4400.781.221.76 504.900.0690.1550.2760.6201.101.732.48 757.350.0840.1900.3380.7601.352.113.04 1009.800.0970.2190.3890.8801.562.433.50 12512.30.1090.2450.4350.9801.742.723.91 15014.70.1190.2670.4751.071.902.974.28 20019.60.1370.3080.5471.232.193.424.93 25024.50.1530.3430.6101.372.443.815.49 30029.40.1670.3750.6701.502.674.176.00 35034.30.1790.4040.7201.622.874.496.46

MODEL 1870 // VACUUM

FlowCapacityat10%Over-Vacuumand60°F[1000SCFH] SetVacuumSize

504.900.1210.2710.4821.081.933.014.34 757.350.1470.3320.5901.332.363.685.31 1009.800.1700.3820.6801.532.724.256.12 12512.30.1900.4270.7591.713.044.746.83 15014.70.2080.4670.8301.873.325.197.47 20019.60.2390.5380.9562.153.825.978.60 25024.50.2660.5991.072.404.266.669.59 30029.40.2910.6551.162.624.667.2710.5 35034.30.3130.7051.252.825.017.8311.3

SERIES 1800

HOW TO ORDER

For easy ordering, select proper model numbers

MODEL 1220A

• Sizes // 2" through 12"

• Pressure settings // 0.5 oz/in2 to 15 psig

• Vacuum settings // 0.5 oz/in2 to 12 psig

• Available in aluminum, carbon steel, stainless steel, fiberglass and other materials

• Modular construction

PRESSURE / VACUUM RELIEF

VALVE WITH PIPE-AWAY FEATURE

Model 1220A is used for pressure and vacuum relief where vapors must be piped away. Escaping vapors are piped away through a flanged outlet connection. This helps to provide increased fire protection and safety.

SPECIAL FEATURES

Model 1220A offers Groth’s special “cushioned air” seating. Superior performing fluoropolymer seating diaphragms are standard to minimize sticking caused by resinous vapors and atmospheric moisture. The Model 1220A has a self draining housing body and drip rings to protect seating surfaces from condensate and freezing. This design also avoids pressure or vacuum buildup due to binding or clogging of the valve. Buna-N, FKM, and other seating diaphragms can be provided when required. Model 1221B may be spring loaded when required for use on blanketed tanks or other type installation requiring higher settings. To insure the proper alignment of seating surfaces there is peripheral guiding and a center stabilizing stem.

MODEL 1220A

MODEL 1221B

SPECIFICATIONS

C A D E

Specifications

†W.P. = Working Pressure. ‡On spring loaded valves, change model number. ◊150# R.F. drilling compatibility F.F. on aluminum and R.F. on carbon steel and stainless steel alloys. Fiberglass dimensions on request. 16 oz/in2 set with spacer. SS set weights-consult factory. *Some sizes require non-ferrous components to achieve 0.5 oz/in2 setting. See TPD for Vacuum Settings

• Include model number and setting when ordering.

• For special options, consult factory

• When ordering steam jacket, include steam pressure/temperature. * Stainless steel guides, stems are

O = No Options Z = Special Options O = No Jacket J = Steam Jacket S = Spacer H = Steam Jacket & Spacer

Diaphragm Material (Seat): B = Buna-N T = Fluoropolymer V = FKM

Z = Special

=

MODEL 1220A/1222B // PRESSURE RELIEF CAPACITY

0.870.506.8713.325.252.782.6135175 1.000.587.3914.327.156.688.8145188 1.731.009.7118.835.674.3117190247 2.001.1610.420.238.279.8125205265

2.601.5011.923.043.590.8143233302

3.001.7312.824.746.897.5153250324 3.462.0013.726.650.2105164268348

4.002.3114.728.653.9112177288374

6.003.4718.035.065.9137215351456 8.004.6220.740.475.8157248404525 10.05.7823.145.184.6175276450584 12.06.9325.249.492.4191301491638 15.08.6628.155.2103211335546709 20.011.632.263.7118241383625811 25.014.435.871.2131267424692898 30.017.339.077.9143289460751975

Flow capacity values listed above are based on full open valves at 100% overpressure.

Read the flow capacity at 100% overpressure directly from the table above. Use linear sted.

If the allowable overpressure is less than 100%, modify the flow capacity using the appropriate “C” factor from the table. If allowable overpressure is more than 100%, consult your Groth Representative.

Calculate the percentage overpressure by the following formula. Note that all pressures are gauge pressure expressed in the same units of measure.

Pf = Flowing pressure

P s = Set pressure

% OP = [(Pf - Ps)/Ps] x 100

Calculate flow capacity at less than 100% overpressure according to the following example.

222.160.190.370.711.482.333.804.93 504.900.290.561.072.233.505.727.42

12512.30.460.891.683.505.518.9911.7 15014.70.500.981.843.826.029.8012.7 17517.20.541.061.994.126.4910.613.7 20019.60.581.132.124.396.9211.314.7 22522.10.611.202.254.657.3312.015.5 25024.50.651.262.364.897.7112.616.3 27527.00.681.322.485.118.0713.217.1 30029.40.701.382.585.338.4213.717.8 37536.80.781.542.885.919.4015.319.8 50049.00.901.783.306.7510.717.522.7 62561.31.001.993.677.4611.919.425.1 75073.51.092.183.998.0712.921.027.3

Flow capacity values listed above are based on full open valves at 100% overpressure.

Read the flow capacity at 100% overpressure directly from the table above. Use linear interpolation if the set pressure is not listed.

If the allowable overpressure is less than 100%, modify the flow capacity using the appropriate “C” factor from the table. If allowable overpressure is more than 100%, consult your Groth Representative.

Calculate the percentage overpressure by the following formula. Note that all pressures are gauge pressure expressed in the same units of measure.

Pf = Flowing pressure

P s = Set pressure

% OP = [(Pf - Ps)/Ps] x 100

Calculate flow capacity at less than 100% overpressure according to the following example.

0.870.504.7010.316.034.760.591.1129

1.000.585.0511.017.237.365.097.9138

1.731.006.6314.522.649.085.3129182

2.001.167.1215.624.252.691.6138195

2.601.508.1017.727.659.8104157222

3.001.738.7019.029.664.2112169238

3.462.009.3320.431.868.9120181256

4.002.3110.021.934.174.0129194274

6.003.4712.226.741.590.1157237334

8.004.6214.030.647.7103180272384 10.05.7815.634.053.0115200302427 12.06.9317.037.157.8125218329465 15.08.6618.841.164.0139242365516 20.011.621.446.872.9158276415587 25.014.423.651.580.3174304457646 30.017.325.455.686.6188327493697

Flow capacity values listed above are based on full open valves at 100% over-vacuum.

Read the flow capacity at 100% over-vacuum directly from the table above. Use linear interpolation if the set vacuum is not listed.

If the allowable over-vacuum is less than 100%, modify the flow capacity using the appropriate “C” factor from the table. If allowable over-vacuum is more than 100%, consult your Groth Representative.

Calculate the percentage over-vacuum by the following formula. Note that all pressures are gauge pressure expressed in the same units of measure.

Pf = Flowing pressure

P s = Set pressure

% OV = [(Pf - Ps)/Ps] x 100

Calculate flow capacity at less than 100% over-vacuum according to the following example.

25024.50.440.961.493.235.648.4912.0 27527.00.461.001.563.385.908.8812.6 30029.40.481.041.623.526.149.2513.1 37536.80.531.161.803.916.8110.314.5 50049.00.601.322.054.457.7511.716.5 62561.30.661.452.264.908.5412.918.2 75073.50.721.572.445.299.2213.919.6

Flow capacity values listed above are based on full open valves at 100% over-vacuum.

Read the flow capacity at 100% over-vacuum directly from the table above. Use linear interpolation if the set vacuum is not listed.

If the allowable over-vacuum is less than 100%, modify the flow capacity using the appropriate “C” factor from the table. If allowable over-vacuum is more than 100%, consult your Groth Representative.

Calculate the percentage over-vacuum by the following formula. Note that all pressures are gauge pressure expressed in the same units of measure.

Pf = Flowing pressure

P s = Set pressure

% OV = [(Pf - Ps)/Ps] x 100

Calculate flow capacity at less than 100% over-vacuum according to the following example.

Flow capacity values listed above are based on full open valves at 100% overpressure.

Read the flow capacity at 100% overpressure directly from the table above. Use linear interpolation if the set pressure is not listed.

If the allowable overpressure is less than 100%, modify the flow capacity using the appropriate “C” factor from the table. If allowable overpressure is more than 100%, consult your Groth Representative.

Calculate the percentage overpressure by the following formula. Note that all pressures are gauge pressure expressed in the same units of measure.

Pf = Flowing pressure

P s = Set pressure

% OP = [(Pf - Ps)/Ps] x 100

Calculate flow capacity at less than 100% overpressure according to the following example.

MODEL 1221B/1223B // PRESSURE RELIEF CAPACITY

0.070.821.572.726.1610.115.521.7 0.100.991.893.287.4512.218.826.2 0.151.232.364.099.2815.223.432.6 0.201.432.764.8010.917.927.438.3 0.251.623.145.4412.320.331.143.4 0.301.793.486.0413.722.534.548.2 0.351.953.816.6115.024.637.852.7 0.402.104.127.1416.226.640.957.0 0.452.254.417.6617.428.543.861.1 0.502.394.708.1618.530.446.665.1 0.552.524.988.6419.632.249.468.9 0.602.655.259.1020.633.952.172.6 0.702.895.7610.022.737.257.279.7 0.803.136.2510.824.640.462.186.5 0.903.356.7211.726.543.566.793.1 1.003.567.1812.528.346.471.299.4

Flow capacity values listed above are based on full open valves at 100% overpressure.

Read the flow capacity at 100% overpressure directly from the table above. Use linear interpolation if the set pressure is not listed.

If the allowable overpressure is less than 100%, modify the flow capacity using the appropriate “C” factor from the table. If allowable overpressure is more than 100%, consult your Groth Representative.

Calculate the percentage overpressure by the following formula. Note that all pressures are gauge pressure expressed in the same units of measure.

Pf = Flowing pressure

P s = Set pressure

% OP = [(Pf - Ps)/Ps] x 100

Calculate flow capacity at less than 100% overpressure according to the following example.

MODEL 1222B/1223B // VACUUM RELIEF CAPACITY

Flow capacity values listed above are based on full open valves at 100% over-vacuum.

Read the flow capacity at 100% over-vacuum directly from the table above. Use linear interpolation if the set pressure is not listed.

If the allowable over-vacuum is less than 100%, modify the flow capacity using the appropriate “C” factor from the table. If allowable over-vacuum is more than 100%, consult your Groth Representative.

Calculate the percentage over-vacuum by the following formula. Note that all pressures are gauge pressure expressed in the same units of measure.

Pf = Flowing pressure

P s = Set pressure

% OV = [(Pf - Ps)/Ps] x 100

Calculate flow capacity at less than 100% over-vacuum according to the following example.

MODEL 1222B/1223B // VACUUM RELIEF CAPACITY

0.070.410.901.553.525.778.8712.4 0.100.481.061.834.166.8310.514.6

0.170.611.352.335.288.6613.318.6 0.180.631.382.385.418.8813.619.0 0.190.641.412.445.539.0813.919.4 0.200.661.442.495.659.2714.219.8 0.220.681.492.585.869.6214.820.6 0.240.701.542.676.059.9315.221.3 >0.24CONSULTFACTORYFORVACUUMSETTINGSGREATERTHAN0.24BARG

Flow capacity values listed above are based on full open valves at 100% over-vacuum.

Read the flow capacity at 100% over-vacuum directly from the table above. Use linear interpolation if the set pressure is not listed.

If the allowable over-vacuum is less than 100%, modify the flow capacity using the appropriate “C” factor from the table. If allowable over-vacuum is more than 100%, consult your Groth Representative.

Calculate the percentage over-vacuum by the following formula. Note that all pressures are gauge pressure expressed in the same units of measure.

Pf = Flowing pressure

P s = Set pressure

% OV = [(Pf - Ps)/Ps] x 100

Calculate flow capacity at less than 100% over-vacuum according to the following example.

MODEL 1720A/1760A

• Same size inlet and outlet connections

• “Cushioned air” seating

• Non-sticking design

• Center and peripheral pallet guiding

• Self-draining body

• Factory tested for compliance with API 2000

• ISO-Certified manufacturing facility

• Higher set pressures (in weight loaded configuration) than standard pipe-away valves

VACUUM RELIEF VALVE WITH PIPE-AWAY FEATURE

Groth Series 1700 relief valves are designed with inlet and outlet flanges of the same size to reduce installation costs by having smaller downstream piping. Model 1720A valves are designed for systems requiring pressure and vacuum relief. Model 1760A valves are designed for systems requiring only pressure relief.

SPECIAL FEATURES

Model 1700 offers Groth’s special “cushioned air” seating. Superior performing fluoropolymer seating diaphragms minimize sticking caused by resinous vapors and atmospheric moisture. The Model 1700 has a self draining housing body and drip rings to protect seating surfaces from condensate and freezing. This design also avoids pressure or vacuum buildup due to binding or clogging of the valve. Buna-N, FKM, and other seating diaphragms can be provided when required. Available in 2”, 3” and 4” sizes and in carbon steel, stainless steel or fiberglass. Trim materials (seat and pallet components) are 316SS. Other materials available on request. Options include stainless steel weights.

SETTING RANGES

Whitebarsinoz/in

MODEL 1720/1760 // PRESSURE RELIEF CAPACITY

Flow capacity values listed above are based on full open valves at 100% overpressure.

Read the flow capacity at 100% overpressure directly from the table above. Use linear interpolation if the set pressure is not listed.

If the allowable overpressure is less than 100%, modify the flow capacity using the appropriate “C” factor from the table. If allowable overpressure is more than 100%, consult your Groth Representative.

Calculate the percentage overpressure by the following formula. Note that all pressures are gauge pressure expressed in the same units of measure.

Pf = Flowing pressure

P s = Set pressure

% OP = [(Pf - Ps)/Ps] x 100

Calculate flow capacity at less than 100% overpressure according to the following example.

MODEL 1720 // VACUUM RELIEF CAPACITY

MODEL 1220A FLOW CAPACITY CALCULATION

Flow capacity values listed above are based on full open valves at 100% over-vacuum.

Read the flow capacity at 100% over-vacuum directly from the table above. Use linear interpolation if the set vacuum is not listed.

If the allowable over-vacuum is less than 100%, modify the flow capacity using the appropriate “C” factor from the table. If allowable over-vacuum is more than 100%, consult your Groth Representative.

Calculate the percentage over-vacuum by the following formula. Note that all pressures are gauge pressure expressed in the same units of measure.

Pf = Flowing pressure

P s = Set pressure

% OV = [(Pf - Ps)/Ps] x 100

Calculate flow capacity at less than 100% over-vacuum according to the following example.

MODEL 12-TH

•Size: 8” (200 mm)

•Bolting: API 12

•Available Pressure Settings:

4, 6, 8, 12, 16, 24 & 32 osig

•Available Vacuum Settings:

0.4, 0.9 & 3.5 osig

•Leak Rate:

1 SCFH air @ 90% of set pressure

•Materials of Construction:

Casting: Aluminum (Non-Sparking)

Envelope Gasket: HNBR, FKM, or Fluorosilicone

Vacuum Diaphragm: HNBR, FKM, Fluorosilicone, or Fluoropolymer

•Optional: Polyester/PTFE Coating

•Accessories: Flange (base) Gasket, Mounting Kit

PRESSURE/VACUUM RELIEF VALVE

The Model 12-TH Thief Hatch was designed to out perform the competition, with industry leading high flow rates and precision tolerances to provide a superior sealing performance. The leakage is less than 1 SCFH of air @ 90% of the set pressure, keeping your tanks in compliance with industry standards.

The Model 12-TH Thief Hatch incorporates a spring loaded pressure/vacuum relief valve within the device. Thief Hatches are used on steel or fiberglass (FRP) low pressure oil tanks. Providing access for level gauging, sampling, and overpressure/vacuum protection for the tanks, all in one compact design.

SPECIAL FEATURES

•Ultra-tight sealing reduces product leakage and fugitive emissions

•Higher flow capacity to protect from excessive pressure build up

•Designed for easy maintenance, thus reducing downtime and lower operational cost

•Corrosion resistance can be enhanced with FKM soft goods and coating

•Direct replacement for any standard round API 12 thief hatch

•Incorporates a mechanical lock system to be used with a pad lock or lock out bar

SPECIFICATIONS

HOW TO ORDER

Body Material:

1 = Aluminum

Envelope Gasket:

H = HNBR

V = FKM

F = Fluorosilicone

Vacuum Diaphragm:

H = HNBR

V = FKM

T = Fluoropolymer

F = Fluorosilicone

Pressure Setting:

1 = 4 osig

2 = 6 osig

3 = 8 osig

4 = 12 osig

5 = 16 osig

6 = 24 osig

7 = 32 osig

Vacuum Setting:

1 = 0.4 osig

2 = 0.9 osig

3 = 3.5 osig

Coating:

O = No Coating

E = Polyester/PTFE Coating

Maintenance Repair Kit: (use the above chart for selecting material and options) KIT # SIZE MATERIAL* OPTIONS*

K S 1 2 T H M K 0 8

Envelope Gasket

Vacuum Diaphragm

Pressure Setting

Vacuum Setting

OPTIONAL ACCESSORIES:

Base Gasket:

GKT12TH08K302 = Non-Asbestos

GKT12TH087602 = FKM

GKT12TH087102 = PTFE

GKT12TH084402 = Black Neoprene

Mounting Kit:

KS12THBS08P01 = Zinc Plated Steel (½-13 UNC Hex Nut & Bolt)

MODEL 12-TH // PRESSURE/VACUUM RELIEF CAPACITY

FlowRate(1000SCFH)

Flowvaluesbasedonairat60

VACUUM RELIEF CAPACITY

FlowRate(1000SCFH)

Flowvaluesbasedonairat60

MODEL 1260A

• Sizes // 2" through 12"

• Pressure settings // 0.5 oz/in2 to 15 psig

• Available in aluminum, carbon steel, stainless steel, fiberglass and other materials

• Modular construction

PRESSURE RELIEF VALVE

Pressure Relief Valve Model 1260A is for use where pressure relief is required and all relieving vapors must be piped away. Tank relief, to avoid tank damage, is controlled by a spring or weight loaded pallet in the valve housing. Pressure relief valves help provide increased fire protection and safety. The Model 1260A can also be used for in-line vacuum relief where flanged inlet connection is required. Back pressure in the system must be considered when using flow curves.

SPECIAL FEATURES

Model 1260A offers Groth’s special “cushioned air” seating. Superior performing fluoropolymer seating diaphragms are standard to minimize sticking caused by resinous vapors and atmospheric moisture. The Model 1260A has a self-draining housing body and drip rings to protect seating surfaces from condensate and freezing. This design also avoids pressure or vacuum buildup due to binding or clogging of the valve. Buna-N, FKM and other seating diaphragms can be provided when required.

SPECIFICATIONS

Specifications subject to change without notice. Certified dimensions available upon request.

2"3"11oz/in28.62"9.37"7.50"4.12"5.50"16.62"16 (50mm)(80mm)(48.3gm/cm2)(219mm)(238mm)(191mm)(105mm)(140mm)(422mm)(7kg) 3"4"13oz/in

(80mm)(100mm)(57.1gm/cm2)(254mm)(282mm)(229mm)(127mm)(152mm)(514mm)(10kg) 4"6"16oz/in211"13.87"11"6.50"6.50"25.62"29 (100mm)(150mm)(70.3gm/cm2)(279mm)(352mm)(279mm)(165mm)(165mm)(651mm)(13kg) 6"8"16oz/in214.50"17.37"13.50"8.50"8.50"34.50"55 (150mm)(200mm)(70.3gm/cm2)(368mm)(441mm)(343mm)(216mm)(216mm)(876mm)(25kg) 8"10"16oz/in218"21.25"16"9.75"10.75"39.75"92 (200mm)(250mm)(70.3gm/cm2)(457mm)(540mm)(406mm)(248mm)(273mm)(1010mm)(42kg) 10"12"16oz/in220.75"23.62"19"10.25"12.50"46.37"105 (250mm)(300mm)(70.3gm/cm2)(527mm)(600mm)(483mm)(260mm)(318mm)(1178mm)(48kg) 12"14"16oz/in224.75"26.62"21"11"15"49.25"149 (300mm)(350mm)(70.3gm/cm2)(629mm)(676mm)(533mm)(279mm)(381mm)(1251mm)(68kg)

MODEL 1260A // PRESSURE RELIEF CAPACITY

0.870.506.8713.325.252.782.6135175 1.000.587.3914.327.156.688.8145188 1.731.009.7118.835.674.3117190247

2.001.1610.420.238.279.8125205265

2.601.5011.923.043.590.8143233302

3.001.7312.824.746.897.5153250324

3.462.0013.726.650.2105164268348

4.002.3114.728.653.9112177288374

6.003.4718.035.065.9137215351456 8.004.6220.740.475.8157248404525 10.05.7823.145.184.6175276450584 12.06.9325.249.492.4191301491638 15.08.6628.155.2103211335546709 20.011.632.263.7118241383625811 25.014.435.871.2131267424692898 30.017.339.077.9143289460751975

Flow capacity values listed above are based on full open valves at 100% overpressure.

Read the flow capacity at 100% overpressure directly from the table above. Use linear sted.

If the allowable overpressure is less than 100%, modify the flow capacity using the appropriate “C” factor from the table. If allowable overpressure is more than 100%, consult your Groth Representative.

Calculate the percentage overpressure by the following formula. Note that all pressures are gauge pressure expressed in the same units of measure.

Pf = Flowing pressure

P s = Set pressure

% OP = [(Pf - Ps)/Ps] x 100

Calculate flow capacity at less than 100% overpressure according to the following example.

MODEL 1260A // PRESSURE RELIEF CAPACITY

12512.30.460.891.683.505.518.9911.7 15014.70.500.981.843.826.029.8012.7 17517.20.541.061.994.126.4910.613.7 20019.60.581.132.124.396.9211.314.7 22522.10.611.202.254.657.3312.015.5 25024.50.651.262.364.897.7112.616.3 27527.00.681.322.485.118.0713.217.1 30029.40.701.382.585.338.4213.717.8 37536.80.781.542.885.919.4015.319.8 50049.00.901.783.306.7510.717.522.7 62561.31.001.993.677.4611.919.425.1 75073.51.092.183.998.0712.921.027.3

Flow capacity values listed above are based on full open valves at 100% overpressure.

Read the flow capacity at 100% overpressure directly from the table above. Use linear interpolation if the set pressure is not listed.

If the allowable overpressure is less than 100%, modify the flow capacity using the appropriate “C” factor from the table. If allowable overpressure is more than 100%, consult your Groth Representative.

Calculate the percentage overpressure by the following formula. Note that all pressures are gauge pressure expressed in the same units of measure.

Pf = Flowing pressure

P s = Set pressure

% OP = [(Pf - Ps)/Ps] x 100

Calculate flow capacity at less than 100% overpressure according to the following example.

MODEL 1261A // PRESSURE RELIEF CAPACITY

MODEL 1220A FLOW CAPACITY CALCULATION

Flow capacity values listed above are based on full open valves at 100% overpressure.

Read the flow capacity at 100% overpressure directly from the table above. Use linear interpolation if the set pressure is not listed.

If the allowable overpressure is less than 100%, modify the flow capacity using the appropriate “C” factor from the table. If allowable overpressure is more than 100%, consult your Groth Representative.

Calculate the percentage overpressure by the following formula. Note that all pressures are gauge pressure expressed in the same units of measure.

Pf = Flowing pressure

P s = Set pressure

% OP = [(Pf - Ps)/Ps] x 100

Calculate flow capacity at less than 100% overpressure according to the following example.

MODEL 1261A // PRESSURE RELIEF CAPACITY

0.070.821.572.726.1610.115.521.7

MODEL 1220A FLOW CAPACITY CALCULATION

Flow capacity values listed above are based on full open valves at 100% overpressure.

Read the flow capacity at 100% overpressure directly from the table above. Use linear interpolation if the set pressure is not listed.

If the allowable overpressure is less than 100%, modify the flow capacity using the appropriate “C” factor from the table. If allowable overpressure is more than 100%, consult your Groth Representative.

Calculate the percentage overpressure by the following formula. Note that all pressures are gauge pressure expressed in the same units of measure.

Pf = Flowing pressure

P s = Set pressure

% OP = [(Pf - Ps)/Ps] x 100

Calculate flow capacity at less than 100% overpressure according to the following example.

MODEL 2300A

• Sizes // 2" through 12"

• Pressure settings // 0.5 oz/in2 to 15 psig

• Available in aluminum, carbon steel, stainless steel, and other materials

EMERGENCY RELIEF VALVE

Model 2300A is designed for emergency relief capacity above that supplied by a standard operating valve used on tanks, piping, and low pressure vessels. Emergency relief valves provide relief from excessive internal pressures which may cause tank damage.

SPECIAL FEATURES

Model 2300A is built of corrosion resistant material throughout. Groth’s self-closing special fluoropolymer “cushioned air” pallet with center stabilizing stem and peripheral guiding provides uniform seating and alignment. Superior performing fluoropolymer seating diaphragms are standard to minimize sticking caused by resinous vapors and atmospheric moisture. The guides support a spun weatherhood which covers and protects the entire valve structure. As added protection against the entry of foreign matter, a mesh screen encircles the valve under the weatherhood. Buna-N, FKM and other seating diaphragms can be provided when required.

SPECIFICATIONS

Specifications subject to change without notice. Certified dimensions available upon request.

2"9.50"9.50"9.75"16.50"12 (50mm)(241mm)(241mm)(248mm)(419mm)(5kg)

3"11.50"13"8.62"22.00"15 (80mm)(292mm)(330mm)(219mm)(550mm)(7kg)

4"13"13"10.56"22.50"20 (100mm)(330mm)(330mm)(268mm)(572mm)(9kg)

6"19"19.50"15"30.50"30 (150mm)(480mm)(495mm)(381mm)(784mm)(14kg)

8"23.62"23.50"16.62"35.37"45 (200mm)(600mm)(597mm)(422mm)(899mm)(20kg)

10"30.75"25.50"17"41.37"65 (250mm)(781mm)(648mm)(431mm)(1051mm)(30kg) 12"36"25.50"18"42.37"100 (300mm)(914mm)(648mm)(457mm)(1076mm)(45kg)

‡ On spring loaded valves, change to model 2301A. † Larger

0.870.506.9815.426.158.588.4143211 1.000.587.5016.528.062.895.0154227 1.731.009.8521.736.882.5125203298 2.001.1610.623.339.688.6134218320 2.601.5012.126.645.1101153248365 3.001.7312.928.648.4108164266392 3.462.0013.930.752.0116176285420 4.002.3114.933.055.8125189307451

6.003.4718.240.468.2152230374550 8.004.6221.046.678.5175265430633 10.05.7823.452.187.6194295479705 12.06.9325.657.195.7212322523769 15.08.6628.563.8107235358581855 20.011.632.773.6122268409665979 25.014.436.382.21362964547361084 30.017.339.589.91483214927991177

Flow capacity values listed above are based on full open valves at 100% overpressure.

Read the flow capacity at 100% overpressure directly from the table above. Use linear sted.

If the allowable overpressure is less than 100%, modify the flow capacity using the appropriate “C” factor from the table. If allowable overpressure is more than 100%, consult your Groth Representative.

Calculate the percentage overpressure by the following formula. Note that all pressures are gauge pressure expressed in the same units of measure.

Pf = Flowing pressure

P s = Set pressure

% OP = [(Pf - Ps)/Ps] x 100

Calculate flow capacity at less than 100% overpressure according to the following example.

15014.70.511.131.914.256.4410.515.4 17517.20.551.222.064.586.9411.316.6 20019.60.591.302.194.887.4012.017.7 22522.10.621.382.325.167.8412..718.7 25024.50.651.462.455.438.2513.419.7 27527.00.691.532.565.688.6314.020.6 30029.40.721.592.675.929.0014.621.5 37536.80.801.782.986.5710.016.223.9 50049.00.912.063.427.4911.418.627.4 62561.31.022.303.808.2812.720.630.3 75073.51.112.514.138.9713.822.432.9

Flow capacity values listed above are based on full open valves at 100% overpressure.

Read the flow capacity at 100% overpressure directly from the table above. Use linear interpolation if the set pressure is not listed.

If the allowable overpressure is less than 100%, modify the flow capacity using the appropriate “C” factor from the table. If allowable overpressure is more than 100%, consult your Groth Representative.

Calculate the percentage overpressure by the following formula. Note that all pressures are gauge pressure expressed in the same units of measure.

Pf = Flowing pressure

P s = Set pressure

% OP = [(Pf - Ps)/Ps] x 100

Calculate flow capacity at less than 100% overpressure according to the following example.

MODEL 2301A // PRESSURE RELIEF CAPACITY

MODEL 1220A FLOW CAPACITY CALCULATION

Flow capacity values listed above are based on full open valves at 100% overpressure.

Read the flow capacity at 100% overpressure directly from the table above. Use linear interpolation if the set pressure is not listed.

If the allowable overpressure is less than 100%, modify the flow capacity using the appropriate “C” factor from the table. If allowable overpressure is more than 100%, consult your Groth Representative.

Calculate the percentage overpressure by the following formula. Note that all pressures are gauge pressure expressed in the same units of measure.

Pf = Flowing pressure

P s = Set pressure

% OP = [(Pf - Ps)/Ps] x 100

Calculate flow capacity at less than 100% overpressure according to the following example.

MODEL 2301A // PRESSURE RELIEF CAPACITY

0.070.801.763.055.8310.115.521.7 0.100.972.133.707.1312.218.826.2 0.151.212.674.649.0515.223.432.7 0.201.433.165.4810.817.927.438.3 0.251.633.606.2512.520.331.143.4 0.301.824.026.9814.022.534.548.2 0.352.004.427.6815.624.637.852.7 0.402.184.818.3417.126.640.857.0 0.452.355.188.9918.628.543.861.1

MODEL 1220A FLOW CAPACITY CALCULATION

Flow capacity values listed above are based on full open valves at 100% overpressure.

Read the flow capacity at 100% overpressure directly from the table above. Use linear interpolation if the set pressure is not listed.

If the allowable overpressure is less than 100%, modify the flow capacity using the appropriate “C” factor from the table. If allowable overpressure is more than 100%, consult your Groth Representative.

Calculate the percentage overpressure by the following formula. Note that all pressures are gauge pressure expressed in the same units of measure.

Pf = Flowing pressure

P s = Set pressure

% OP = [(Pf - Ps)/Ps] x 100

Calculate flow capacity at less than 100% overpressure according to the following example.

• Sizes // 2" through 12"

• Vacuum settings // 0.5 oz/in2 to 12 psig

• Available in aluminum, carbon steel, stainless steel, and other materials

• Modular construction

VACUUM RELIEF VALVE

Model 1300A is used when vacuum relief is the only requirement. Intake relief necessary under working conditions is achieved by a spring or weight loaded pallet. This feature of the Model 1300A reduces the possibility of tank damage. The Model 1300A helps to provide increased fire protection and safety. Valve size must be selected to perform required vacuum relief under operating and thermal conditions. Flow curves for vacuum relief are provided.

SPECIAL FEATURES

Model 1300A offers Groth’s special “cushioned air” seating. Superior performing fluoropolymer seating diaphragms are standard to minimize sticking caused by resinous vapors and atmospheric moisture. The Model 1300A has a self draining housing body and drip rings to protect seating surfaces from condensate and freezing. This design also avoids vacuum buildup due to binding or clogging of the vent. Metal-to-metal, Buna-N, FKM and other seating diaphragms can be provided when required.

SPECIFICATIONS

Specifications subject to change without notice. Certified dimensions available upon request.

2"12oz/in211.62"6.87"14"6"15 (50mm)(52.7gm/cm2)(295mm)(174mm)(356mm)(152mm)(7kg) 3"11oz/in215.75"7.75"16.25"7.75"21 (80mm)(48.3gm/cm2)(400mm)(196mm)(413mm)(197mm)(10kg) 4"11oz/in217.25"9.62"19.87"9"32 (100mm)(48.3gm/cm2)(438mm)(244mm)(505mm)(229mm)(14kg) 6"16oz/in223.50"11.87"27"12"61 (150mm)(70.3gm/cm2)(597mm)(301mm)(686mm)(305mm)(28kg) 8"16oz/in228.50"15.50"31.87"14.50"81 (200mm)(70.3gm/cm2)(724mm)(394mm)(810mm)(368mm)(37kg) 10"16oz/in233.25"18.62"37.87"16.50"121 (250mm)(70.3gm/cm2)(845mm)(473mm)(962mm)(419mm)(55kg) 12"16oz/in237.25"21.62"42"19"165 (300mm)(70.3gm/cm2)(946mm)(549mm)(1067mm)(483mm)(75kg)

MODEL 1300A // VACUUM RELIEF CAPACITY

Flow capacity values listed above are based on full open valves at 100% over-vacuum.

Read the flow capacity at 100% over-vacuum directly from the table above. Use linear interpolation if the set vacuum is not listed.

If the allowable over-vacuum is less than 100%, modify the flow capacity using the appropriate “C” factor from the table. If allowable over-vacuum is more than 100%, consult your Groth Representative.

Calculate the percentage over-vacuum by the following formula. Note that all pressures are gauge pressure expressed in the same units of measure.

Pf = Flowing pressure

P s = Set pressure

% OV = [(Pf - Ps)/Ps] x 100

Calculate flow capacity at less than 100% over-vacuum according to the following example.

MODEL 1300A // VACUUM RELIEF CAPACITY

Flow capacity values listed above are based on full open valves at 100% over-vacuum.

Read the flow capacity at 100% over-vacuum directly from the table above. Use linear interpolation if the set vacuum is not listed.

If the allowable over-vacuum is less than 100%, modify the flow capacity using the appropriate “C” factor from the table. If allowable over-vacuum is more than 100%, consult your Groth Representative.

Calculate the percentage over-vacuum by the following formula. Note that all pressures are gauge pressure expressed in the same units of measure.

Pf = Flowing pressure

P s = Set pressure

% OV = [(Pf - Ps)/Ps] x 100

Calculate flow capacity at less than 100% over-vacuum according to the following example.

MODEL 1301A // VACUUM RELIEF CAPACITY

Flow capacity values listed above are based on full open valves at 100% over-vacuum.

Read the flow capacity at 100% over-vacuum directly from the table above. Use linear interpolation if the set pressure is not listed.

If the allowable over-vacuum is less than 100%, modify the flow capacity using the appropriate “C” factor from the table. If allowable over-vacuum is more than 100%, consult your Groth Representative.

Calculate the percentage over-vacuum by the following formula. Note that all pressures are gauge pressure expressed in the same units of measure.

Pf = Flowing pressure

P s = Set pressure

% OV = [(Pf - Ps)/Ps] x 100

Calculate flow capacity at less than 100% over-vacuum according to the following example.

MODEL 1301A // VACUUM RELIEF CAPACITY

Flow capacity values listed above are based on full open valves at 100% over-vacuum.

Read the flow capacity at 100% over-vacuum directly from the table above. Use linear interpolation if the set pressure is not listed.

If the allowable over-vacuum is less than 100%, modify the flow capacity using the appropriate “C” factor from the table. If allowable over-vacuum is more than 100%, consult your Groth Representative.

Calculate the percentage over-vacuum by the following formula. Note that all pressures are gauge pressure expressed in the same units of measure.

Pf = Flowing pressure

P s = Set pressure

% OV = [(Pf - Ps)/Ps] x 100

Calculate flow capacity at less than 100% over-vacuum according to the following example.

MODEL 1360A

• Sizes // 3" through 14"

• Vacuum settings // 0.5 oz/in2 to 12 psig

• Available in aluminum, carbon steel, stainless steel, fiberglass and other materials

VACUUM RELIEF VALVE

Model 1360A is used when vacuum relief is the only requirement. The Model 1360A may be side mounted on the tank body or piped in. Intake relief necessary under working conditions is achieved by a spring or weight loaded pallet in the valve housing. The Model 1360A reduces the possibility of tank damage.

Valve size must be selected to meet required vacuum relief under operating and thermal conditions. Flow curves for vacuum relief are provided.

SPECIAL FEATURES

Model 1300A offers Groth’s special “cushioned Model 1360A offers Groth’s special “cushioned air” seating. Superior performing fluoropolymer seating diaphragms are standard to minimize sticking caused by resinous vapors and atmospheric moisture. The Model 1360A has a self draining housing body and drip rings to protect seating surfaces from condensate and freezing. This design also avoids vacuum buildup due to binding or clogging of the vent. Metal-to-metal, Buna-N, FKM and other seating diaphragms can be provided when required.

SPECIFICATIONS

3"11oz/in28.62"9.25"7.50"5.50"16.25"12 (80mm)(48.2gm/cm2)(219mm)(235mm)(191mm)(140mm)(413mm)(6kg) 4"13oz/in210"11.50"9"6"19.75"17 (100mm)(57.0gm/cm2)(254mm)(292mm)(229mm)(152mm)(502mm)(8kg) 6"16oz/in211"14.25"11"6.50"24.62"23 (150mm)(70.3gm/cm2)(279mm)(362mm)(279mm)(165mm)(625mm)(10kg) 8"16oz/in214.50"17.75"13.50"8.50"32.75"42 (200mm)(70.3gm/cm2)(368mm)(451mm)(343mm)(216mm)(832mm)(19kg) 10"16oz/in218"21.25"16"10.75"38"71 (250mm)(70.3gm/cm2)(457mm)(540mm)(406mm)(273mm)(965mm)(32kg) 12"16oz/in220.75"25.75"19"12.50"45.37"83 (300mm)(70.3gm/cm2)(527mm)(654mm)(483mm)(318mm)(1152mm)(38kg) 14"16oz/in224.75"29.25"21"15"48.75"118 (350mm)(70.3gm/cm2)(629mm)(743mm)(533mm)(381mm)(1238mm)(54kg)

MODEL 1360A // VACUUM RELIEF CAPACITY

MODEL 1220A FLOW CAPACITY CALCULATION

Flow capacity values listed above are based on full open valves at 100% over-vacuum.

Read the flow capacity at 100% over-vacuum directly from the table above. Use linear interpolation if the set vacuum is not listed.

If the allowable over-vacuum is less than 100%, modify the flow capacity using the appropriate “C” factor from the table. If allowable over-vacuum is more than 100%, consult your Groth Representative.

Calculate the percentage over-vacuum by the following formula. Note that all pressures are gauge pressure expressed in the same units of measure.

Pf = Flowing pressure

P s = Set pressure

% OV = [(Pf - Ps)/Ps] x 100

Calculate flow capacity at less than 100% over-vacuum according to the following example.

MODEL 1360A // VACUUM RELIEF CAPACITY

Flow capacity values listed above are based on full open valves at 100% over-vacuum.

Read the flow capacity at 100% over-vacuum directly from the table above. Use linear interpolation if the set vacuum is not listed.

If the allowable over-vacuum is less than 100%, modify the flow capacity using the appropriate “C” factor from the table. If allowable over-vacuum is more than 100%, consult your Groth Representative.

Calculate the percentage over-vacuum by the following formula. Note that all pressures are gauge pressure expressed in the same units of measure.

Pf = Flowing pressure

P s = Set pressure

% OV = [(Pf - Ps)/Ps] x 100

Calculate flow capacity at less than 100% over-vacuum according to the following example.

MODEL 1361A // VACUUM RELIEF CAPACITY

MODEL 1220A FLOW CAPACITY CALCULATION

Flow capacity values listed above are based on full open valves at 100% over-vacuum.

Read the flow capacity at 100% over-vacuum directly from the table above. Use linear interpolation if the set pressure is not listed.

If the allowable over-vacuum is less than 100%, modify the flow capacity using the appropriate “C” factor from the table. If allowable over-vacuum is more than 100%, consult your Groth Representative.

Calculate the percentage over-vacuum by the following formula. Note that all pressures are gauge pressure expressed in the same units of measure.

Pf = Flowing pressure

P s = Set pressure

% OV = [(Pf - Ps)/Ps] x 100

Calculate flow capacity at less than 100% over-vacuum according to the following example.

MODEL 1361A // VACUUM RELIEF CAPACITY

0.070.661.462.535.749.3914.420.2 0.100.771.712.966.7211.016.923.7

0.110.811.783.097.0011.517.624.7 0.120.841.853.207.2611.918.325.6

0.130.861.913.317.5012.318.926.4 0.140.891.963.417.7212.619.427.2 0.150.912.023.507.9313.019.927.9 0.160.942.073.588.1213.320.428.6

0.170.962.113.668.3013.620.929.3 0.180.982.153.738.4713.921.329.8 0.190.992.193.808.6214.121.730.4 0.201.012.233.868.7614.322.030.9 0.221.042.293.979.0114.722.731.7 0.241.062.344.069.2115.123.232.4 >0.24CONSULTFACTORYFORVACUUMSETTINGSGREATERTHAN0.24BARG

Flow capacity values listed above are based on full open valves at 100% over-vacuum.

Read the flow capacity at 100% over-vacuum directly from the table above. Use linear interpolation if the set pressure is not listed.

If the allowable over-vacuum is less than 100%, modify the flow capacity using the appropriate “C” factor from the table. If allowable over-vacuum is more than 100%, consult your Groth Representative.

Calculate the percentage over-vacuum by the following formula. Note that all pressures are gauge pressure expressed in the same units of measure.

Pf = Flowing pressure

P s = Set pressure

% OV = [(Pf - Ps)/Ps] x 100

Calculate flow capacity at less than 100% over-vacuum according to the following example.

MODEL 5000

• Sizes // 2" through 12"

• Available in carbon steel, stainless steel, and other materials

• High flow capacity

FREE VENTS

Model 5100 Series are designed to be used on tanks containing non-volatile liqids and on vent pipe extremities. Groth Free Vents offer efficient flow capacity for the protection of the tank.

SPECIAL FEATURES

Model 5100 Series are built of corrosion resistant materials throughout. A wire mesh screen prevents foreign matter from entering the tank or pipe opening. Weather hoods are easily removable for inspection of vent and wire mesh screen.

MODEL5100

SPECIFICATIONS

Specifications subject to change without notice. Certified dimensions available upon request.

MODEL5000

2"10.25"6.87"8 (50mm)(260mm)(174mm)(4kg)

3"14.50"9.25"20 (80mm)(368mm)(235mm)(9kg)

4"18.75"11.37"35 (100mm)(476mm)(289mm)(16kg)

6"26.87"15.68"70 (150mm)(682mm)(398mm)(32kg)

8"35.12"20.12"135 (200mm)(892mm)(511mm)(61kg)

10"43.37"24"235 (250mm)(1102mm)(610mm)(107kg)

12"51.87"28.43"350 (300mm)(1317mm)(722mm)(159kg)

Larger sizes available on special application.

HOW TO ORDER

MODEL5100

2"9.50"5.37"11 (50mm)(241mm)(136mm)(5kg)

3"11.50"5.81"14 (80mm)(292mm)(148mm)(6kg)

4"13"6.31"18 (100mm)(330mm)(160mm)(8kg)

6"17"7.37"28 (150mm)(432mm)(187mm)(13kg)

8"19.50"9.25"42 (200mm)(495mm)(235mm)(19kg)

10"23.50"10.62"60 (250mm)(597mm)(270mm)(27kg)

12"25.50"13.50"95 (300mm)(648mm)(343mm)(43kg)

MODEL 5000 // FLOW CAPACITY

MODEL 5000 // FLOW CAPACITY

13751350.691.522.625.9410.316.223.3 15001470.721.592.746.2010.716.924.3

MODEL 5000 // FLOW CAPACITY

MODEL 5000 // FLOW CAPACITY

MODEL 5100 // FLOW CAPACITY

MODEL 5100 // FLOW CAPACITY

757.350.180.410.701.582.744.316.19 1009.800.210.470.811.823.164.987.14 15014.70.260.570.992.233.876.108.75 20019.60.300.661.142.584.477.0410.1 25024.50.340.741.272.884.997.8711.3 37536.80.410.901.563.536.119.6413.8 50049.00.471.041.804.077.0611.116.0 62561.30.531.172.014.557.8812.417.8 75073.50.581.282.204.988.6313.619.5 87585.80.631.382.385.389.3214.721.1 100098.00.671.472.545.7410.015.722.5 11251100.711.562.696.0910.616.623.9 12501230.751.652.846.4211.117.525.2 13751350.781.732.976.7311.718.426.4 15001470.821.803.117.0212.219.227.5

MODEL 5100 // FLOW CAPACITY

MODEL 5100 // FLOW CAPACITY

15014.70.210.460.791.793.114.907.02 20019.60.240.530.912.063.585.648.09 25024.50.270.591.022.303.996.299.02 37536.80.330.721.242.804.857.6511.0 50049.00.370.821.423.215.578.7812.6 62561.30.420.911.583.566.189.7414.0 75073.50.451.001.713.886.7210.615.2 87585.80.491.071.844.167.2111.416.3 100098.00.521.131.954.417.6512.117.3 11251100.541.192.064.658.0612.718.2 12501230.571.252.154.868.4313.319.1 13751350.591.302.245.068.7813.819.9 15001470.611.352.325.259.1014.320.6

MODEL 6000

• Sizes // 4" through 10"

• Available in aluminum, carbon steel, stainless steel, and other materials

• Available in free lift or lockdown cover

• Designed to assure uniform seating

GAUGE HATCH

Model 6000 Series provide access for gauging or obtaining product samples from storage tanks. The Model 6000 also provides pressure relief as emergency venting. The Model 6100 incorporates a positive cover hold down which assures a premium tight seal on tanks with internal pressures up to 3 psig. Gasketed covers are recommended on tanks with high pressure settings. Model 6100 offers lockdown capability.

SPECIAL FEATURES

Model 6000 Series is designed with a serrated foot lever surface to avoid foot slippage when opening. This model permits the use of both hands during gauging or sampling. Gravity will close the cover upon removal of pressure on the foot treadle. Groth’s special “cushioned-air” seating or metal-to-metal seatings available.

SPECIFICATIONS

Specifications subject to change without notice. Certified dimensions available upon request.

4"10"6"7 (100mm)(250mm)(152mm)(3kg)

6"12.50"8"10 (150mm)(318mm)(203mm)(5kg)

8"15"8"13 (200mm)(381mm)(203mm)(6kg) 10"17.75"9"17 (250mm)(451mm)(229mm)(8kg)

MODEL 2000A

• Sizes // 16", 20" and 24”

• Pressure settings // 1.5 - 16 oz/in2

• Vacuum settings // 0.5 - 4 oz/in2

• Available in carbon steel, stainless steel, fiberglass and other materials

• Easy access manway combined with emergency relief

EMERGENCY PRESSURE RELIEF VALVE

Model 2000A is designed to provide emergency relief capacity beyond that furnished by the normal operating pressure relief valve on the tank. The valve protects the tank against rupture or explosion that could result from excessive internal pressures caused by fire, etc. As excessive pressure builds up, the Groth Model 2000A relieves excess pressure, then reseats when pressure has been dissipated. Removable stops can be provided which restrict the lift of the cover.

SPECIAL FEATURES

Model 2000A is built of corrosion resistant materials throughout. A grounding cable connects the head and flange. Groth’s special fluoropolymer “cushioned air” pallet and peripheral guiding insures proper alignment and integrity of seating. Model 2050A incorporates a vacuum breaker for added vacuum relief capability.

SPECIFICATIONS

B ABB

Specifications subject to change without notice. Certified dimensions available upon request.

MODEL2000A

16"1.50oz/in216oz/in223.50"11"62 (406mm)(6.5mbar)(69mbar)(597mm)(279mm)(28kg)

20"1.50oz/in216oz/in227.50"11"88 (508mm)(6.5mbar)(69mbar)(699mm)(279mm)(40kg)

24"1.50oz/in216oz/in232"11"114 (610mm)(6.5mbar)(69mbar)(813mm)(279mm)(52kg)

MODEL2050A

16"2.6oz/in20.5oz/in

(406mm)(11.2mbar)(2.2mbar)(34.5mbar)(597mm)(451mm)(31kg)

20"2.1oz/in20.5oz/in28oz/in227.50"17.75"95 (508mm)(9.1mbar)(2.2mbar)(34.5mbar)(699mm)(451mm)(43kg)

24"1.9oz/in20.5oz/in28oz/in232"17.75"120 (610mm)(8.2mbar)(2.2mbar)(34.5mbar)(813mm)(451mm)(55kg)

s Maximum

HOW TO ORDER

◊ Max. vacuum setting is 4 oz./in2 Fiberglass dimensions on request. For easy ordering, select proper model numbers

on

=

• Include model number and setting when ordering.

• For special options, consult factory

• When ordering steam jacket, include steam pressure / temperature. * Stainless steel guides, stems are standard with carbon steel bodies.

Material (Seat):

* Standard vacuum settings, consult factory for other settings.

Flow capacity values listed above are based on full open valves at 100% overpressure.

Read the flow capacity at 100% overpressure directly from the table above. Use linear interpolation if the set pressure is not listed.

If the allowable overpressure is less than 100%, modify the flow capacity using the appropriate “C” factor from the table. If allowable overpressure is more than 100%, consult your Groth Representative.

Calculate the percentage overpressure by the following formula. Note that all pressures are gauge pressure expressed in the same units of measure.

Pf = Flowing pressure

P s = Set pressure

% OP = [(Pf - Ps)/Ps] x 100

Calculate flow capacity at less than 100% overpressure according to the following example.

Flow capacity values listed above are based on full open valves at 100% overpressure.

Read the flow capacity at 100% overpressure directly from the table above. Use linear interpolation if the set pressure is not listed.

If the allowable overpressure is less than 100%, modify the flow capacity using the appropriate “C” factor from the table. If allowable overpressure is more than 100%, consult your Groth Representative.

Calculate the percentage overpressure by the following formula. Note that all pressures are gauge pressure expressed in the same units of measure.

Pf = Flowing pressure

P s = Set pressure

% OP = [(Pf - Ps)/Ps] x 100

Calculate flow capacity at less than 100% overpressure according to the following example.

MODEL 2100

• Sizes // 16", 20" and 24”

• Pressure settings // 1 - 15 psig

• Available in carbon steel, stainless steel and other materials

• Unique design // spring loaded cover

EMERGENCY PRESSURE RELIEF VALVE

Model 2100 is designed to provide emergency relief capacity beyond that furnished by the normal operating pressure relief valve on the tank. The valve protects the tank against rupture or explosion that could result from excessive internal pressures caused by fire, etc. As excessive pressure builds up, Model 2100 relieves, then reseats when the overpressure has been dissipated.

SPECIAL FEATURES

Model 2100 is built of corrosion resistant materials throughout. It is designed with independently adjustable springs which load the cover and keep the valve tightly sealed until set pressure is reached. The Model 2100 features a FKM seating to ensure a tight seal.

SPECIFICATIONS

Specifications subject to change without notice. Certified dimensions available upon request.

(406mm)(69mbar)(1.03bar)(933mm)(584mm)(141kg)(223kg)

(508mm)(69mbar)(1.03bar)(933mm)(584mm)(152kg)(227kg)

(610mm)(69mbar)(1.03bar)(1035mm)(686mm)(190kg)(304kg)

MODEL 2100 // PRESSURE RELIEF CAPACITY

MODEL 1220A FLOW CAPACITY CALCULATION

Flow capacity values listed above are based on full open valves at 100% overpressure.

Read the flow capacity at 100% overpressure directly from the table above. Use linear interpolation if the set pressure is not listed.

If the allowable overpressure is less than 100%, modify the flow capacity using the appropriate “C” factor from the table. If allowable overpressure is more than 100%, consult your Groth Representative.

Calculate the percentage overpressure by the following formula. Note that all pressures are gauge pressure expressed in the same units of measure.

Pf = Flowing pressure

P s = Set pressure

% OP = [(Pf - Ps)/Ps] x 100

Calculate flow capacity at less than 100% overpressure according to the following example.

MODEL 2100 // PRESSURE RELIEF CAPACITY

MODEL 1220A FLOW CAPACITY CALCULATION

Flow capacity values listed above are based on full open valves at 100% overpressure.

Read the flow capacity at 100% overpressure directly from the table above. Use linear interpolation if the set pressure is not listed.

If the allowable overpressure is less than 100%, modify the flow capacity using the appropriate “C” factor from the table. If allowable overpressure is more than 100%, consult your Groth Representative.

Calculate the percentage overpressure by the following formula. Note that all pressures are gauge pressure expressed in the same units of measure.

Pf = Flowing pressure

P s = Set pressure

% OP = [(Pf - Ps)/Ps] x 100

Calculate flow capacity at less than 100% overpressure according to the following example.

MODEL 2400A//2450A

• Sizes // 16", 20" and 24”

• Pressure settings // 1.5 - 8 oz/in2

• Vacuum settings // 0.5 - 4 oz/in2

• Hinged with lift stop for positive reseating

• Available in carbon steel, stainless steel, and other materials

• Easy access manway combined with emergency relief

EMERGENCY PRESSURE RELIEF VALVE

Series 2400A is designed to provide emergency relief capacity beyond that furnished by the normal operating pressure/vacuum relief valve on the tank. The valve protects the tank against rupture or internal pressures caused by fire exposure. Series 2400A is designed to be selfclosing. As excessive pressure builds up, Series 2400A relieves, then reseats when overpressure has been dissipated. Counter weights are available for lower settings.

SPECIAL FEATURES

Model 2000A is built of corrosion resistant materials throughout. Groth’s special fluoropolymer “cushioned air” pallet and peripheral guiding insures proper alignment and integrity of seating. Model 2450A incorporates a vacuum breaker for added vacuum relief capability.

SPECIFICATIONS

Specifications subject to change without notice. Certified dimensions available upon request.

MODEL2400A

16"1.5oz/in28oz/in223.50" 11” 20.50"72 (406mm)(6.5mbar)(34.5mbar)(597mm)(279mm)(521mm)(33kg)

20"1.5oz/in28oz/in228.75"11"22.50"98 (508mm)(6.5mbar)(34.5mbar)(730mm)(279mm)(572mm)(45kg)

24"1.5oz/in28oz/in233.25" 11” 24.50"124 (610mm)(6.5mbar)(34.5mbar)(845mm)(279mm)(622mm)(56kg)

MODEL2450A

(406mm)(11.6mbar)(2.2mbar)(34.5mbar)(597mm)(470mm)(622mm)(36kg)

20"2.3oz/in20.5oz/in28oz/in228.75"18.50" 26” 105 (508mm)(9.9mbar)(2.2mbar)(34.5mbar)(730mm)(470mm)(660mm)(48kg)

24"2.0oz/in20.5oz/in28oz/in233.25"

27.50"130 (610mm)(8.6mbar)(2.2mbar)(34.5mbar)(845mm)(470mm)(699mm)(59kg)

* 150# ANSI. or API 650 drilling compatibility. † Minimum pressure setting 1.0 oz/in2 on special application.

s Maximum pressure setting on 16” size = 4 oz/in2. Fiberglass dimensions on request. “Caution” See IOM when mounting to API 650 flange. ◊ Max. vacuum setting is 4 oz./in2. **Minimum pressure setting 1.5 oz/in2 on special application.

HOW TO ORDER

For easy ordering, select proper model numbers

• Include model number and setting when ordering.

• For special options, consult factory

• When ordering steam jacket, include steam pressure / temperature.

* Seat material on carbon steel base is Stainless Steel weld overlay

Material*

= No Options

= Special Options

= No Jacket

= Steam Jacket

= ANSI 150# drilled

= A.P.I. 650 drilled

Diaphragm Material (Seat): B = Buna-N T = Fluoropolymer V = FKM

Z = Special

* Standard vacuum settings, consult factory for other settings.

MODEL 1220A FLOW CAPACITY CALCULATION

Flow capacity values listed above are based on full open valves at 100% overpressure.

Read the flow capacity at 100% overpressure directly from the table above. Use linear interpolation if the set pressure is not listed.

If the allowable overpressure is less than 100%, modify the flow capacity using the appropriate “C” factor from the table. If allowable overpressure is more than 100%, consult your Groth Representative.

Calculate the percentage overpressure by the following formula. Note that all pressures are gauge pressure expressed in the same units of measure.

Pf = Flowing pressure

P s = Set pressure

% OP = [(Pf - Ps)/Ps] x 100

Calculate flow capacity at less than 100% overpressure according to the following example.

MODEL 1220A FLOW CAPACITY CALCULATION

Flow capacity values listed above are based on full open valves at 100% overpressure.

Read the flow capacity at 100% overpressure directly from the table above. Use linear interpolation if the set pressure is not listed.

If the allowable overpressure is less than 100%, modify the flow capacity using the appropriate “C” factor from the table. If allowable overpressure is more than 100%, consult your Groth Representative.

Calculate the percentage overpressure by the following formula. Note that all pressures are gauge pressure expressed in the same units of measure.

Pf = Flowing pressure

P s = Set pressure

% OP = [(Pf - Ps)/Ps] x 100

Calculate flow capacity at less than 100% overpressure according to the following example.

FIBERGLASS RELIEF VALVES

• Groth provides fiberglass products for corrosive service

• Available Available in Series 1200A, 1300A, 2000A and others

FIBERGLASS SERIES 1200A, 1300A, 2000A AND OTHERS

Fiberglass valves are used the same as their counterparts manufactured in metal, primarily on aboveground storage tank installations. Fiberglass construction can be used where highly corrosive and toxic liquids are being stored. The fiberglass series design will protect the tank from damage created by overpressuring or excessive vacuum. Costly product evaporation losses due to normal tank “breathing” are greatly reduced. Retention of product vapors reduces the possibility of atmospheric contamination.

SPECIAL FEATURES

Fiberglass valves offer Groth’s special “cushioned air” seating. Superior performing fluoropolymer seating diaphragms are standard to minimize sticking caused by resinous vapors and atmospheric moisture. These valves have a self draining housing body and drip rings to protect seating surfaces from condensate and freezing. This design also avoids pressure or vacuum buildup due to binding or clogging of the valves. These fiberglass valves may be spring loaded when required for use on blanketed tank or other type installations requiring higher settings. To insure the proper alignment of seating surfaces there is peripheral guiding and a center stabilizing stem.

FIBERGLASS RELIEF VALVES

FIBERGLASSWITH VINYLESTERRESIN#411

FIBERGLASS WITHFURANRESIN

RESISTANTRESISTANT

ACIDS:BASES:ACIDS:

Acetic Potassium HydroxideAcetic Nitric (5%)

Acrylic Sodium Hydroxide *Acrylic Phosphoric

Boric Ammonium Hydroxide *Chlorophenol Sulfonic

Chromic (20%)Ammonium CarbonateHydrochloric Sulfuric (25%, 50%)

Formic Potassium Carbonate *

Hydrochloric Sodium Carbonate *

BASES:

Hydrofluoric * Aniline Sodium Carbonate

Nitric (<40%)

WATER: Diethylamine Sodium Hydroxide

Perchloric Demineralized Potassium Carbonate(5%, 50%)

Phosphoric Distilled

Sulfuric (75%)

SALTS:

OTHERS: Alum Ferric Chloride

SALTS: Alcohols Ammonium BromideMagnesium Sulfate

Alum Alum ChlorohydroxideCalcium ChlorideSodium Chromate

Ammonium ChlorideGlycerin

Calcium ChlorideSulfonated Detergents

WATER: Ferric ChlorideUrea-Ammonium NitrateDemineralizedDistilled

Magnesium SulfateFertilizers

Sodium Chloride

Sodium Chromate

BLEACHINGAGENTS:

Calcium Chlorate

Calcium Hypochlorite

Chlorine Dioxide

Chlorine Water

Hydrogen Peroxide

Potassium

Permanganate

Sodium Chlorate

Sodium Hypochlorite

Solvents

SOLVENTS:

Acetone Methanol

Benzene Methyl Ethyl Ketone

Carbon DisulfideMethyl Isobutyl Ketone

Carbon TetrachloridePerchloroethylene

ChlorobenzeneToluene

Ethanol Trichloroethylene

Ethyl Acetate Xylene

Ethylene Dichloride

OTHERS:

Acrylonitrile Pulp Mill Liquors

Benzyl ChlorideStyrene

CyclohexanoneToluene Diisocyanate

Formalin

NONRESISTANTNONRESISTANT

Phenol

Bleaching AgentsPeroxides

Oleum Bromine Free Halogens

Furfural

*Synthetic Veil should be used in inner layer.

• Dimensional drawings on request.

• Chemical resistance information provided by Dow Chemical (Vinyl Ester Resin) and Qua Corr (Furan).

• End user to make final determination on suitability of chemical resistance

• Consult a chemical resistance guide or handbook for additional material compatibility information.

• For Flow Data see corresponding model literature.

STEAM JACKETED VALVES

• Prevents freezing and product buildup

• Designed for easy maintenance

• Available in Series 1200A, 1300A, 2000A and others

STEAM JACKETED VALVES

Steam jacketed valves are designed for use on tanks containing liquids whose vapors may crystallize at normal temperature. They afford protection against valve clogging. Uniform heating of the housing and valves assures the valve will remain in operating condition. Available on model numbers 1200A, 1220A, 1260A, 1300A, 1360A, 2000A, 2300A and 2400A.

SPECIAL FEATURES

Valve covers can be easily removed for convenient inspection and maintenance. Steam heated valves are suitable for steam circulation up to 100 psig saturated.

TECHNICAL SECTION // TPD

1200ASeriesValves

Due to the modular construction of Groth pressure/vacuum relief valves, internal components can be utilized which permit settings as low as 0.5 oz/in2 and as high as 15 psig. Similarly, vacuum relief valves may withstand tank working pressures as high as 100 psig (special construction required).

However, the light weight formed pallets required for low vacuum settings may not withstand the high working pressures, and the heavier machined plate pallets required for high working pressures may not permit low vacuum settings.

The following table defines the minimum vacuum setting as a function of the maximum tank working pressures for Models 1201B, 1221B, 1300A and 1360A valves based on the dead weight of each pallet assembly.

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