S201D~P Instruction Manual

Type S201D and S201P

Fisher Controls

Instruction Manual

Type S201D & S201P Gas Regulators

September 1981

Form 5173

WARNING Fisher regulators must be installed, operated, and maintained in accordance with federal, state, and local codes, rules and regulations, and Fisher instructions.

If a leak develops in the system, service to the unit may be required. Failure to correct trouble could result in a hazardous condition.

Call a gas serviceman to service the unit. Only a qualified person must install or service the regulator.

Figure 1. Typical S201D Gas Regulator

INTRODUCTION

INSTALLATION

Scope

Description The regulators can be used for monitoring service, as well as on industrial and commercial applications. Type S201D is supplied with a piped-up loading regulator while the S201P4-P9 series is not furnished with a loading regulator. S201P4, P5, and P6 have a combination of spring and pressure loading; S201P7, P8, and P9 are completely pressure loaded. All S201P series units have a 3/4 inch downstream control line connection.

WARNING Personal injury or system damage may result if this regulator is installed, without appropriate overpressure protection, where service conditions could exceed the limits given on the regulator nameplate. Regulator installations should be adequately protected from physical damage.

Under enclosed conditions or indoors, escaping gas, such as in the case of a ruptured diaphragm, may accumulate and be an explosion hazard.

Specifications Table 1 lists the specifications for Type S201D and S201P4P9 constructions. The following information is stamped on the regulator at the factory: type number, date of manufacture, spring or pressure range, port size, maximum inlet pressure, maximum operating outlet pressure, and outlet pressure which may damage regulator parts.

ŠFisher Controls 1981

C AU T I O N Like most regulators, S201D and S201P regulators have an outlet pressure rating lower than their inlet pressure rating. If actual inlet pressure can exceed the outlet pressure rating,

Part No. D400008X012

This instruction manual provides instructions and a parts list for Type S201D and Types S201P4 through P9 pressure loaded gas service regulators.

Type S201D and S201P Table 1. Sprecifications BODY SIZES AND END CONNECTION STYLE

1-1/2 or 2 inch NPT screwed inlet and outlet n 2 inch class 125 ANSI flanged

MAXIMUM ALLOWABLE INLET PRESSURES MAXIMUM EMERGENCY OUTLET PRESSURE

OUTLET PRESSURE RANGE

SEAT RING DIAMETERS

1/4, 3/8, 1/2, 3/4, 1, and 1-3/16 inches

See table 2

TEMPERATURE CAPABILITIES

–20°F to +150°C (–29°to 66°C)

15 psig (1.03 bar)

PRESSURE REGISTRATION

Internal (S201D), Downstream control line (S201P4-P9)

CONTROL LINE CONNECTION

3/4" FNPT (S201P4-P9 only)

APPROXIMATE WIEGHT

22 pounds (10 kg)

2.0" W.C. to 10 psig (4.9 millibar to 0.69 bar)

outlet overpressure protection is necessary, However, overpressuring any portion of the regulators beyond the limits in table 2 may cause leakage, damage to regulator parts, or personal injury due to bursting of pressure-containing parts.

Some type of external overpressure protection should be provided if inlet pressure will be high enough to damage downstream equipment.

Common methods of external overpressure protection include relief valves, monitoring regulators, shutoff devices, and series regulation.

If the regulator is exposed to an overpressure condition, it should be inspected for any damage that may have occurred. Regulator operation below these limits does not preclude the possibility of damage from external sources or from debris in the pipeline.

Before installing the regulator, check for damage which might have occurred in shipment. Also check for dirt or foreign matter which may have accumulated in the regulator body or in the pipeline. Apply pipe compound to the male threads of the pipeline and install the regulator so that flow is in the direction of the arrow cast on the body.

Do not install the regulator in a location where there can be excessive water accumulation, such as directly beneath a down spout.

If the regulator is used in conjunction with a Type 289H relief valve, the 289H should be set 10 inches W.C. higher than the outlet pressure setting of the regulator, up to 30 inches W.C. reduced pressure. For pressure greater than this, set the 289H 3/4 psi higher than the outlet pressure setting of the regulator.

The S201D has a Type 67 (0 to 10 psig outlet settings) or S251 or S252 (inches of water column outlet settings) loading regulator factory installed. On S201P units, this type of regulator or equivalent must be installed between the 1-inch FNPT vent opening and the 1/4-inch FNPT body connection (cast iron bodies only) in order to supply loading pressure.

2

Maximum outlet pressure settings are shown in table 3.

Outlet pressure more than 2 psi (light diaphragm head) or 3 psi (heavy diaphragm head) above the set point may damage internal parts such as the diaphragm head and valve disk. The maximum emergency (casing) outlet pressure is 15 psig.

Downstream Control Line C AU T I O N All S201P units must be installed with an external downstream control line attached to the tapped connection in the lower spring case. If the control line is not connected to the lower casing, or if it should fail, the regulator will remain wide open and there will be no pressure control.

Install the control line before putting the regulator into operation. The downstream control line pipe should be at least 1/2-inch in diameter, connected to a straight section of outlet piping 5 to 10 pipe diameters downstream of the regulator, and adequately protected against damage.

To dampen pulsations which may cause instability or cycling of the regulator, a hand valve should be installed in the downstream control line. The hand valve can be throttled down to dampen pulsations, but must never be completely closed during operation.

STARTUP C AU T I O N Pressure gauges should always be used to monitor downstream pressure during startup.

Procedures used in putting this regulator into operation must be planned accordingly if the downstream system is pressurized by another regulator or by a manual bypass.

If the downstream system is not pressurized by another regulator or manual bypass valve, use the following procedure to start up the regulator.

Type S201D and S201P 2. The spring should be set at its minimum outlet setting, see table 4. To increase the outlet setting, turn the adjusting screw (key 3, figure 3) clockwise. To decrease the outlet setting, turn the adjusting screw counterclockwise.

Table 2. Inlet Pressure Seat Ring Size Inches

mm

1/4 3/8 1/2 3/4 1 1-3/16

6.3 9.5 12.7 19.0 25.4 30.2

Inlet Pressure Setting Optimum Maximum Psig Bar Psig Bar 125 8.6 125 8.6 100 6.9 125 8.6 60 4.1 100 6.9 25 1.7 60 4.1 13 .9 25 1.7 5 .3 13 .9

3. Adjust the loading regulator’s outlet setting anywhere within the spring range of the S201P4-P6.

4. Replace the closing cap.

For S201D, S201P7, P8, and P9 units:

Table 3. Maximum Outlet Pressure Setting

1. Adjust the loading regulator to the desired outlet pressure setting.

Diaphragm Maximum Outlet* Heads Light 30" W.C. (74.7 millibar) Heavy 10 psig (0.69 baar) * Maximum emergency outlet (casing) pressure for S200 series is 15 psig.

SHUTDOWN Installation arrangements may vary, but in any installation it is important that the valves be opened or closed slowly and that the outlet pressure be vented before venting inlet pressure to prevent damage caused by Color Code reverse pressurization of the regulator. The steps Brown below apply to the typical installation as indicated.

Table 4. Spring Chart – Type S201P4, P5, & P6 Only Diaphragm Heads

Light

Heavy

Spring Range Inches W.C. 2.0 - 4.5 3.5 - 6.5 5.0 - 9.0 8.5 - 18.0 14.0 - 30.0 1.0 - 2.0 psig 1.5 - 3.25 psig 2.0 - 5.0 psig 2.0 - 5.5 psig 4.0 - 10.0 psig

Millibar 4.9 - 11.2 8.7 - 16.2 12.4 - 22.4 21.2 - 44.8 34.9 - 74.7 .07 - .14 bar .10 - .22 bar .14 - .34 bar .14 - .38 bar .28 - .69 bar

Part Number 1D8925 27022 1D8926 27022 1D8927 27022 1D8932 27032 1D8933 27032 1H9758 27032 1H9759 27032 1P6154 27142 0Y0664 27022 1H8024 27032

Red Black Gray Dark Green Dark Blue Orange Yellow Green Stripe Cadmium

1.Open the hand valve in the control line (all S201P types.)

2. Slowly open the upstream shutoff valve.

3. Slowly open the downstream shutoff valve.

4. If the regulator (with a downstream control line) tends to pulsate, throttle down the hand valve in the control line. Never allow the hand valve to be completely closed while the regulator is in operation.

5. Check all connections for leaks.

6. Light the appliance pilots.

Adjustment The range of allowable pressure settings is stamped on the nameplate. If the required setting is not within this range, substitute the correct spring (as shown in table 4) or change the loading regulator of pressure-loaded constructions. If the spring or loading regulator is changed, be sure to change the nameplate to indicate the new pressure range.

A pressure gauge should always be used to monitor downstream pressure while adjustments are being made.

For S201P4, P5, and P6 units: 1. Remove the closing cap (key 4, figure 3).

1. Open valves downstream of the regulator.

2. Slowly close the upstream shutoff valve.

3. Pressure releases downstream with S201P units. Remove the closing cap to exhaust pressure from S201D units.

PRINCIPLE OF OPERATION See figure 2.

Type S201D has internal pressure registration. All S201P units utilize a downstream control line connected to the lower spring case. They have a blocked throat and the downstream pressure reaches the diaphragm through the control line.

When downstream demand decreases, the pressure under the diaphragm increases. This pressure overcomes the regulator setting (which is set by a pressure-loading regulator, or a combination of a spring and pressure loading). Through the action of the pusher post assembly, the valve disk moves closer to the seat ring and reduces gas flow. If demand downstream increases, pressure under the diaphragm decreases. Loading pressure (and spring force in the case of S201P4-P6) pushes the pusher post assembly downward, the valve disk moves away from the seat ring, and the gas flow increases.

The Type S201D regulator works by these principles, but also has a feature which the other regulators do not include. The lower spring seat is attached to the spring case rather than to the diaphragm plate. The spring force pulls up on the diaphragm assembly in opposition to the loading regulator pressure which pushes down on the diaphragm. Due to this type of action, the Type S201D

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Type S201D and S201P LOADING REGULATOR

2. On S201D, remove the closing cap (key 4), adjusting nut (key 3), upper spring seat (key 52) and spring (key 2).

On S201P4-P6, remove the closing cap (key 4), adjusting screw (key 3) and spring (key 2).

LOWER SPRING SEAT

3. Remove hex nuts (key 15) and cap screws (key 14).

Separate the upper spring case (key 1) from the lower casing assembly (key 9).

DIAPHRAGM

Note PUSHER POST INLET PRESSURE OUTLET PRESSURE

VALVE DISC SEAT RING

LOADING PRESSURE

Figure 2. Type S201D-67-4 Regulator Operating Schematic regulator will close during no-pressure conditions (other units would open).

Type S201P4-P6 regulators have both spring and pressure loading. In the event pressure loading should fail, the minimum outlet setting of the spring would continue to be supplied to the downstream system.

Type S201P7-P9 units do not contain a spring. Without loading pressure the regulator moves to the open position.

MAINTENANCE WARNING To avoid personal injury or equipment damage, do not attempt any maintenance or disassembly without first isolating the regulator from system pressure and relieving all internal pressure as described in “Shutdown”.

Regulators that have been disassembled for repair must be tested for proper operation before being returned to service. Only parts manufactured by Fisher should be used for repairing Fisher regulators. Relight pilot lights according to normal startup procedures.

Due to normal wear or damage that may occur from external sources, this regulator should be inspected and maintained periodically. The frequency of inspection and replacement of parts depends upon the severity of service conditions or the requirements of local, state, and federal rules and regulations.

Disassembly to Replace Diaphragm Refer to figure 3.

1. Disconnect the loading regulator from the vent.

If disassembling a Type S201D, lift the upper spring case straight up in order to avoid hitting the stem (key 24).

4. Slide the diaphragm and diaphragm head assembly (key 7) away from the body (key 21) to unhook the pusher post (key 8) from the lever (key 10). Lift off the diaphragm and diaphragm head assembly.

Type S201D — The lower spring seat is attached to the upper spring case and has already been removed.

Unscrew the stem (key 24) and separate the diaphragm, diaphragm head assembly, and pusher post.

5. All units except the Type S201D — Unscrew the stem (key 24) which fastens the lower spring seat (key 6) to the pusher post and separate the lower spring seat, diaphragm and diaphragm plate assembly, and pusher post.

6. Reassemble the spring case unit in the reverse order of the above steps. Note the following: a. Before tightening the cap screw or stem into the pusher post, place the loosely-assembled diaphragm assembly into position in the lower casing, being sure that the pusher post is hooked on the lever. Rotate the diaphragm so that the diaphragm and lower casing holes are aligned. Tighten the screw or stem. b. Tighten the spring case cap screws finger-tight only. After replacing the spring and adjusting screw, turn the adjusting screw in about half way. This procedure will ensure proper slack in the diaphragm. Finish tightening the cap screws.

Note Take care not to pinch or tear the diaphragm when reassembling.

Disassembly to Replace Valve Disk, Seat Ring, and O-Rings Refer to figure 3.

1. Remove any control line piping or loading pressure tubing from the body.

2. Remove the bolts (key 18) which hold the lower spring casing (key 9) to the body (key 21). Separate the lower spring casing from the body.

3. Check the body O-ring (key 19) for wear.

4

Type S201D and S201P 4. Examine the valve disk (key 16) for nicks, cuts and other damage. Unscrew the disk holder assembly from the valve stem assembly (key 13) and replace it with a new part if necessary.

5. If the seating edge of the seat ring (key 20) is nicked or rough, remove the seat ring from the body. Change to a new part when reassembling the regulator. (If the seat ring is being replaced with a different sized port, change the nameplate to state the new size and maximum inlet pressure.)

Steps 6 through 8 apply to S201P units only.

6. To inspect or replace the stem adaptor O-ring (key 64), remove the retaining ring (key 63) and slide the stem adaptor (key 67) off the stem.

7. The O-ring stem seal (key 65, S201P5, P6, P8, &

P9) should be examined and replaced if necessary.

8. Also examine and replace if necessary the stem wiper ring (key 66, S201P6 & P9). The wiper ring has a special electro-film treatment, and only Fisher parts should be used for the wiper ring.

ORDERING PARTS The type number, seat ring (port) size, and date of manufacture are stamped on the nameplate. Always provide this information in any correspondence with your Fisher representative regarding replacement parts or technical assistance. If construction changes are made in the field, be sure that the nameplates are also changed to reflect the most recent construction.

TYPE 67-4

101 - Apply Never-Seez lubricant compound

102 - Apply lead seal compound

103 - Apply rubber cement

Figure 3. Type S201D With Type 67-4 Loading Regulator

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Type S201D and S201P Part Number

Key

16* Disk Holder Assembly For Natural Gas Service1P7349 000A2 For Manufactured Gas (3/4 inch & larger seat rings) 1J1680 X0012 18 Cap Screw, steel, Cd pl (2 req’d) 1H9747 24052 19* O-Ring, nitrile T12587 T0012 20 Seat Ring, aluminum S201D 1/4 inch Port Diameter1U2191 09022 1/2 inch Port Diameter1U2197 09022 3/4 inch Port Diameter1U2221 09022 1-3/16 inch Port Diameter 1U2239 09022 S201P 1/4 inch Port Diameter1H9792 09022 3/8 inch Port Diameter1H9793 09022 1/2 inch Port Diameter1H9794 09022 3/4 inch Port Diameter1H9795 09022 1 inch Port Diameter 1H9796 09022 1-3/16 inch Port Diameter 1H9797 09022 21 Body With 1/4 inch Tubing Connection Cast Iron 1-1/2 inch NPT 1J1904 19012 2 inch NPT 1H9689 19012 2 inch 125 lb. Flg. 2L4251 19012 S201P4-P9 only Steel 1-1/2 inch NPT 1K7879 22012 2 inch NPT 1K7921 22012 With 1/8 inch Test Gauge Connection 1-1/2 inch NPT 1P7991 22012 2 inch NPT 1P7994 22012 24 Stem, steel, zinc pl S201D 1R2616 11102 Cap Screw, steel, zinc pl S201P4-P9 2 - 30 inch W.C. 1C4732 24052 1 - 10 psig 1A6678 24052 46 Pipe Plug, 1/8 inch NPT Brass 1A6219 14012 304 SST 1F5623 35042 Steel, Cd pl, 1/4 inch NPT (S201P4, P5, P6, P7, P8, P9) 1A7675 24662

52

Key

PARTS LIST Key 1

2

3

4 5* 6

Description

Part Number

Spring Case S201D 4L1423 T0012 S201P (Heavy diaphragm head) 1J7186 T0012 Spring, steel See table 4 for S201P4, P5, P6 S201D 0B0197 27052 S201P7, P8, P9 have no spring Adjusting Screw Aluminum (S201P4, P5, P6 only) 1L9286 08012 Adjusting Nut, brass S201D 1A2019 14012 Closing Cap, aluminum 1L9283 08012 Closing Cap Gasket Neoprene 1N4462 06992 Upper/Lower Spring Seat Zinc (S201P4, P5, P6) 0X0147 44012 Cast Iron (S201D) 1U2260 19012

7

Diaphragm Head, steel S201D (2 req’d) S201P4-P9 (2 req’d) 2 - 30 inches W.C. 1 - 10 psig 7A* Diaphragm, nitrile 8

9

0B0066 28982 0B0066 28982 1A3478 25022 1K6496 02052

Pusher Post, aluminum S201D 1R2615 08012 S201P4-P9 1L1433 11992

Lower Casing Assembly, aluminum S201D 1H9751 X0012 S201P Series 1H9751 X0022 9B Union Ring, aluminum (2 req’d) 2H9734 08022 10 Lever, steel 1H9740 28992 11 Pin, 303 SST 1H9729 35032 12 Machine Screw, steel (2 req’d) 1B4204 28982 13 Valve Stem Assembly S201D 1H9748 000A2 S201P 1L1426 000A2

Description

Description

Part Number

Upper Spring Seat, steel S201D only 1A8695 54 Hex Nut, steel, Cd pl S201D only 1A4997 55 Flapper Stem, 302 SST (S201P4-P6) 1H9763 56 Lower Flapper, nylon (S201P4-P6) 1H9764 57 Upper Flapper, nylon (S201P4-P6) 1H9765 58 Seat Ring, 302 SST (S201P4-P6) 1H9766 59 Self-tapping Screw, steel (3 req’d) (S201P4-P6) 1H9767 60 Spring, 302 SST (2 req’d) (S201P4-P6) 1H9768 61 Screen, Monel† (S201P4-P6) 1E5648 62 Snap Ring, 302 SST 1E5649 63 Retaining Ring, SST (S201P4-P9) 1L1428 64* O-Ring, nitrile (S201P4-P9) 1L1429 65* O-Ring, nitrile (S201P5, P6, P8, P9) 1E2163 66 Wiper Ring, nitrile (S201P6, P9) 1L1430 67 Stem Adaptor, aluminum (S201P4-P9) 1L1431 69 Lower Head Gasket, nitrile 1L1434 71 Pipe Bushing, carb, steel pl S201D only 1H1714 72 Pipe Nipple Steel (S201D/67-4) 1C4882 Gal. Zinc (S201D/251 or 252) 1H3934 73 Male Elbow, aluminum S201D/S251 or S252 (2 req’d) 1K9299 74 Male Connector, aluminum S201D/67-4 only 1K9298 75 Loading Tubing, aluminum S201D/67-4 1R2557 S201D/S251 or S252 1U3200

24092 24122 35022 06992 06992 36012

28982 37022 43122 37022 38992 06992 06992 06992 09012 03022 28992 26232 26012

11992 11992 11052 11052

* Recommended Spare Part † Trademark of International Nickel Company

While this information is presented in good faith and believed to be accurate, Fisher Controls does not guarantee satisfactory results from reliance upon such information. Nothing contained herein is to be construed as a warranty or guarantee, express or implied, regarding the performance, merchantability, fitness

Fisher Controls

or any other matter with respect to the products, nor as a recommendation to use any product or process in conflict with any patent. Fisher Controls reserves the right, without notice, to alter or improve the designs or specifications of the products described herein.

For information, write: P.O. Box 190, Marshalltown, Iowa, U.S.A. Medway House, Knight Road Strood, ROCHESTER, Kent, England ME2 2EZ Printed in USA