VACUUM RELIEF VALVES
MODELS 1300A & 1301A
MODELS 1300A & 1301A
The Groth Models 1300A & 1301A are 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 reduces the possibility of tank damage due to an excessive vacuum condition. Valve size must be selected to perform required vacuum relief under operating and thermal conditions.
Technical Details
• Certification: ATEX and PED Approval
• Materials: Aluminum, Carbon Steel, Stainless Steel, special materials upon request
Model 1300A
• Sizes: 2” (DN50) through 12” (DN300)
• Vacuum Settings: 0.5 osi to 17.3 osi (2.15 mbarg to 1.19 barg)
Model 1301A
• Sizes: 2” (DN50) through 12” (DN300)
• Vacuum Settings: 1 psig to 12 psig (68.9 mbarg to 827 mbarg)
• Additional Materials: Fiberglass
Features
• Modular Construction
• Cushioned air seating
• Fluoropolymer seating diaphragms minimize sticking caused by resinous vapors and atmospheric moisture
• Self-draining housing body and drip rings to protect seating surfaces from condensate and freezing
• Design avoids vacuum buildup due to binding or clogging of the vent
Options
• Seating Diaphragm Options: FKM, Buna-N or other materials
PAGE 2
SPECIFICATIONS
See TPD for Vacuum Settings and MAWP
† 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.
PAGE 3
C A Size◊ In (mm) Max. Set Vacuum Weight Loaded oz/in2 (gm/cm2) Max. Set Vacuum Spring Loaded Min. Set Vacuum Weight Loaded Max. W.P.† for Min. Vacuum Setting Min. Vac. Setting for Max. W.P.† A Length In (mm) B Height In (mm) BB Height In (mm) C Width In (mm) Approx. Ship Wt. for AI Lbs (kg) 2 (50) 12 (52.7) 11.62 (295)6.87 (174)14 (356)6 (152)15 (7) 3 (80)11 (48.3) 15.75 (400)7.75 (196)16.25 (413)7.75 (197)21 (10) 4 (100) 11 (48.3) 17.25 (438)9.62 (244)19.87 (505)9 (229)32 (14) 6 (150) 16 (70.3) 23.50 (597) 11.87 (301)27 (686) 12 (305)61 (28) 8 (200) 16 (70.3) 28.50 (724) 15.50 (394)31.87 (810) 14.50 (368) 81 (37) 10 (250) 16 (70.3) 33.25 (845) 18.62 (473)37.87 (962) 16.50 (419) 121 (55) 12 (300) 16 (70.3) 37.25 (946) 21.62 (549)42 (1067) 19 (483)165 (75) 12 psig Spring Loaded Pressure (0.84 kg/cm 2 ) *0.5 oz/in 2 Weight Loaded (2.20 gm/cm 2 )
B BB
MODEL 1300A VACUUM RELIEF CAPACITY
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
Ps = Set pressure
% OV = [(Pf - Ps)/Ps] x 100
Calculate flow capacity at less than 100% over-vacuum according to the following example.
Example Flow Capacity Calculation
Example to find “C” factor from table:
Read “C” factor for 75% Over-vacuum at intersection of row 70 and column 5
“C” factor at 75% OV = 0.87
6” Model 1300A 1.Read flow capacity at set pressure from table Flow = 74,000 SCFH
4 InWC Set Vacuum [Ps]2.Calculate over-vacuum
PAGE 4
% OV = [(7 - 4)/4] x 100 = 75%
Flowing Vacuum [Pf]3.Read “C” factor from table “C” = 0.87 4.Calculate flow capacity Flow = 0.87 x 74,000 = 64,380 SCFH Air
1000 Standard Cubic Feet per Hour
60° F Set Vacuum
Size In (mm) InWCoz/in2 2 (50)3 (80)4 (100)6 (150)8 (200)10 (250)12 (300) 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 “C” Factor Table %OV0123456789 100.420.430.440.450.460.460.470.480.490.50 200.510.520.520.530.540.550.560.560.570.58 300.590.590.600.610.610.620.630.640.640.65 400.660.660.670.680.680.690.700.700.710.72 500.720.730.730.740.750.750.760.770.770.78 600.780.790.800.800.810.810.820.820.830.84 700.840.850.850.860.860.870.880.880.890.89 800.900.900.910.910.920.920.930.930.940.94 900.950.950.960.960.970.970.980.990.991.00
7 InWC
Flow Capacity at 100% Over-Vacuum (Double Set Vacuum)
at
(Ps)
MODEL 1300A VACUUM RELIEF CAPACITY
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
Ps = Set pressure
% OV = [(Pf - Ps)/Ps] x 100
Calculate flow capacity at less than 100% over-vacuum according to the following example.
Example Flow Capacity Calculation
6” Model 1300A
Example to find “C” factor from table: Read “C” factor for 75% over-vacuum at intersection of row 70 and column 5
“C” factor at 75% OV = 0.87
1.Read flow capacity at set vacuum from table Flow = 2,080 NCMH
100 mmWC Set Vacuum [Ps]2.Calculate over-vacuum
PAGE 5
% OV = [(175 - 100)/100] x 100 = 75% 175 mmWC Flowing Vacuum
table “C”
Flow
1,810 NCMH
(150)8 (200)10 (250)12 (300) 222.160.130.290.450.981.712.583.65 504.900.200.440.681.482.583.885.48 757.350.240.530.831.813.154.746.70 1009.800.280.620.962.083.625.467.72 12512.30.310.691.072.324.046.098.60 15014.70.340.751.172.534.416.659.40 17517.20.370.811.262.734.757.1610.1 20019.60.390.861.342.915.077.6410.8 22522.10.420.911.423.085.368.0811.4 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
75073.50.721.572.445.299.2213.919.6 “C” Factor Table %OV0123456789 100.420.430.440.450.460.460.470.480.490.50 200.510.520.520.530.540.550.560.560.570.58 300.590.590.600.610.610.620.630.640.640.65 400.660.660.670.680.680.690.700.700.710.72 500.720.730.730.740.750.750.760.770.770.78 600.780.790.800.800.810.810.820.820.830.84
[Pf]3.Read “C” factor from
= 0.87 4.Calculate flow capacity
= 0.87 x 2,080 =
Air Flow Capacity at 100% Over-Vacuum (Double Set Vacuum) 1000 Normal Cubic Meters per Hour at 0° C Set Vacuum (Ps) Size In (mm) mmWCmb2 (50)3 (80)4 (100)6
62561.30.661.452.264.908.5412.918.2
700.840.850.850.860.860.870.880.880.890.89 800.900.900.910.910.920.920.930.930.940.94 900.950.950.960.960.970.970.980.990.991.00
MODEL 1301A VACUUM RELIEF CAPACITY
1.0013.830.552.9120197302422
1.1014.531.955.4126206316442 1.2015.133.257.7131215330460
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
Ps = Set pressure
% OV = [(Pf - Ps)/Ps] x 100
Calculate flow capacity at less than 100% over-vacuum according to the following example.
Example Flow Capacity Calculation
6” Model 1301A
Example to find “C” factor from table: Read “C” factor for 75% over-vacuum at intersection of row 70 and column 5
“C” factor at 75% OV = 0.83
1.Read flow capacity at set vacuum from table Flow = 166,000 SCFH
2 psig Set Vacuum [Ps]2.Calculate over-vacuum % OV = [(3.50 - 2.0)/2.0] x 100 = 75%
3.5 psig Flowing Vacuum [Pf]3.Read “C” factor from table “C” = 0.83
4.Calculate flow capacity Flow = 0.83 x 166,000 = 137,780 SCFH
PAGE 6
Air Flow Capacity at 100% Over-Vacuum (Double Set Vacuum) 1000 Standard Cubic Feet per Hour at 60° F Set Vacuum (Ps) Size In (mm) psig2
(80)4 (100)6 (150)8 (200)10 (250)12 (300)
(50)3
1.3015.734.559.9136223342478 1.4016.235.762.0141231355495 1.5016.836.964.0145239366511 1.7518.039.668.7156256393548 2.0019.142.073.0166272417582 2.2520.144.376.9174286439613 2.5021.046.380.4183300460641 2.7521.948.283.7190312478667 3.0022.749.986.6197323495691 3.2523.451.489.3203333511713 3.5024.052.891.8208342525732 >3.50 CONSULT FACTORY FOR VACUUM SETTINGS GREATER THAN 3.5 PSIG “C” Factor Table %OV0123456789 10 ••• Consult Factory••• 200.270.290.300.320.330.350.360.380.390.40 300.420.430.440.450.470.480.490.500.510.52 400.530.540.550.560.570.580.590.600.610.62 500.630.640.650.660.670.670.680.690.700.71 600.720.720.730.740.750.760.760.770.780.79 700.800.800.810.820.820.830.840.850.850.86 800.870.870.880.890.900.900.910.920.920.93 900.940.940.950.960.960.970.970.980.991.00
MODEL 1301A VACUUM RELIEF CAPACITY
0.070.410.901.553.525.778.8712.4
0.100.481.061.834.166.8310.514.6
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
Ps = Set pressure
% OV = [(Pf - Ps)/Ps] x 100
Calculate flow capacity at less than 100% over-vacuum according to the following example.
Example Flow Capacity Calculation
6” Model 1301A
Example to find “C” factor from table: Read “C” factor for 72% over-vacuum at intersection of row 40 and column 2
“C” factor at 42% OV = 0.55
1.Read flow capacity at set vacuum from table Flow = 4,530 NCMH
0.12 barg Set Vacuum [Ps]2.Calculate over-vacuum % OV = [(0.17 - 0.12)/0.12] x 100 = 42%
0.17 barg Flowing Vacuum [Pf]3.Read “C” factor from table “C” = 0.55
4.Calculate flow capacity Flow = 0.55 x 4,530 = 2,492 NCMH
PAGE 7
Air Flow Capacity at 100% Over-Vacuum (Double Set Vacuum) 1000 Normal Cubic Meters per Hour at 0° F Set Vacuum (Ps) Size In (mm)
barg2 (50)3 (80)4 (100)6 (150)8 (200)10 (250)12 (300)
0.110.511.111.924.357.1411.015.3 0.120.531.151.994.537.4311.415.9 0.130.551.202.074.697.7011.816.5 0.140.561.242.144.857.9612.217.1 0.150.581.272.205.008.2112.617.6 0.160.601.312.275.148.4413.018.1 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 >0.24 CONSULT FACTORY FOR VACUUM SETTINGS GREATER THAN 0.24 BARG “C” Factor Table %OV0123456789 10 ••• Consult Factory ••• 20 0.270.290.300.320.330.350.360.380.390.40 30 0.420.430.440.450.470.480.490.500.510.52 40 0.530.540.550.560.570.580.590.600.610.62 50 0.630.640.650.660.670.670.680.690.700.71 60 0.720.720.730.740.750.760.760.770.780.79 70 0.800.800.810.820.820.830.840.850.850.86 80 0.870.870.880.890.900.900.910.920.920.93 90 0.940.940.950.960.960.970.970.980.991.00
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HOW TO ORDER
For easy ordering, select proper model numbers
1300A Weight Loaded
1301A Spring Loaded
Pallet Material
Seat Material
Body Material
= Stainless Steel
= Vinyl Ester Resin
= Furan
= Special
Notes
• 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 aluminum and carbon steel bodies. Stainless steel seats standard with carbon steel bodies.
Indicates a 2” Model 1300A with Aluminum Body and Seat, Stainless Steel Pallet, Fluoropolymer Seat Diaphragm, and no other options.
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
5
1 = Aluminum 3 = Carbon Steel
6
7
Z
02" thru 12"
GROTHCORP.COM
MODEL # SIZE MATERIAL OPTIONS
Example 0 0 A 1 0 2 1 T O O — 3 5 ooooo oo ooo ooo 1 — — Groth Corporation, LLC reserves the right to alter the information in this publication without notice. // © 2021 Groth Corporation, LLC Reproduction without written permission is prohibited. LIT19145 // 0321