EMERSON FISHER 6353 (01) PDF MANUAL


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PDF Content Summary: 6350 Series Pilots for Pilot-Operated Pressure Reducing Regulators Figure 1. 6350 Series Pressure Reducing Pilot Constructions BELLOWS

Introduction Scope of the Manual This manual provides installation, startup, maintenance, and parts ordering information for the 6350 Series pilots used together with Pilot- Operated Pressure Reducing Regulators in low pressure applications. For information on mounting on Pilot-operated Regulators, refer to full product literature: Type 1098-EGR: D100339X012 Type EZL: D103091X012 VALVE PLUG SPRING BLEED HOLE UNBALANCED VALVE PLUG BALANCED VALVE PLUG SCREW-IN BLEED RESTRICTION Product Description The 6350 Series pilots have been designed to ensure maximum pressure control accuracy and fast response in a wide variety of applications: natural gas distribution systems; fuel gas supply to industrial boilers, furnaces, ovens, and mixers; and large commercial/industrial establishments such as shopping centers and schools. They can also be used in plant air and in liquid service. DETAIL OF TYPE 6351 PILOT REMOVABLE VENT DETAIL OF TYPE 6352, W6956 TYPE 6350 SERIES ON A TYPE 6350 SERIES ON A 6353, OR 6354L PILOT 6353, OR 6354L PILOT TYPE 1098-EGR REGULATOR Instruction Manual D103153X012 July 2019 6350 Series W3149-1* W3160-2*

1L346127142 6350 Series Specifications The Specifications section lists pressure limitations and other specifications for various models of 6350 Series pilots. Please note that the pilot control spring range is displayed on the pilot spring case, and the pilot restriction code is stamped on the pilot body (S=standard gain, L=low gain, H=high gain). Maximum Pilot Supply Pressure(1)(2) 600 psig / 41.4 bar Outlet Pressure Ranges See Table 1 Process Temperature Capabilities(1) Standard Elastomers: -20 to 150°F / -29 to 66°C High-Temperature Elastomers: 0 to 300°F / -18 to 149°C, except 0 to 180°F / -18 to 82°C for water service 1L346127142 15A9258X012 1. Without diaphragm limiter. 2. With diaphragm limiter. 2Pilot Restriction Code S - Standard gain L - Low Gain H - High gain Connections(3) 1/4 NPT internal Approximate Weight 2 pounds / 1 kg 1. The pressure/temperature limits in this instruction manual or any applicable standard limitation should not be exceeded. 2. For stability or overpressure protection, a reducing regulator may be installed upstream of the pilot according to the Installation section. 3. Connections threaded to various national or international standards can usually be supplied. Contact your local Sales Office. Table 1. Outlet Pressure Ranges PILOT TYPE OUTLET (CONTROL) PRESSURE RANGE SPRING COLOR SPRING PART NUMBER 6351 3 to 20 psig 0.21 to 1.4 bar Green 1B986027212 5 to 35 psig 0.35 to 2.4 bar Silver 1B788327022 35 to 100 psig 2.41 to 6.9 bar Red 1K748527202 6352 14 in. w.c. to 2 psig 2 to 10 psig 14A9672X012 14A9673X012 6353 3 to 40 psig 35 to 125 psig 35 mbar to 0.14 bar Yellow 0.14 to 0.69 bar Black 1E392527022 1K748527202 6354L(1) 6354M(2) 6354H 0.21 to 2.8 bar Yellow 2.4 to 8.6 bar Red 85 to 200 psig(1) 5.9 to 13.8 bar(1) Blue 175 to 220 psig(2) 12.1 to 15.2 bar(2) Blue 200 to 300 psig(2) 13.8 to 20.7 bar(2) Green Principle of Operation Pilot-operated regulators use inlet pressure as the operating medium, which is reduced through pilot operation to load the actuator diaphragm. Outlet or downstream pressure opposes loading pressure in the actuator and also opposes the pilot control spring. In operation, assume that outlet pressure is below the pilot control setting. Control spring force on the pilot diaphragm thus opens the pilot valve plug providing additional loading pressure to the actuator diaphragm. This loading pressure forces the actuator stem forward, opening the main valve plug via a bump connection. The upward motion of the plug allows gas to flow through the cage into the downstream system. When downstream demand has been satisfied, outlet pressure will increase, acting on the pilot and actuator diaphragm. This pressure exceeds the pilot control spring setting, moving the pilot diaphragm away and letting the valve plug spring (Type 6351) or bellows (Types 6352 through 6354M pilots) close the pilot valve plug (unbalanced in the Type 6351 but balanced in the Types 6352 through 6354M pilots). Excess loading pressure on the actuator diaphragm escapes downstream through the bleed hole (Type 6351 pilot) or restriction (Types 6352 through 6354M pilots). Reduced actuator loading pressure permits the main valve to close. The combination of main valve spring force and valve plug unbalance provides positive valve plug shutoff against the port and upper seals. All 6350 Series pilots have an internal check valve that allows loading pressure to bleed downstream at approximately 25 psig / 1.7 bar differential across the actuator diaphragm.

Installation and Startup 1. Use qualified personnel when installing, operating and maintaining pilots. Before installing, inspect pilot and tubing, for any shipment damage or foreign material that may have collected during crating and shipment. Make certain that body is clean and the pipelines are free of foreign material. ! WARNING In hazardous or flammable gas service, vented gas may accumulate, and cause personal injury, death, or property damage due to fire or explosion. Vent a regulator in hazardous gas !WARNING service to a remote, safe location away from air intakes or any hazardous location. The vent line or stack opening must be protected against condensation or clogging. 2. To keep the pilot spring case vent from being plugged or the spring case from collecting moisture, corrosive chemicals, or other foreign material, point the vent down or otherwise protect it. To remotely vent the standard pilot, remove the vent and install obstruction-free tubing or piping into the 1/4 NPT vent tapping. Provide protection on a remote vent by installing a screened vent cap into the remote end of the vent pipe. 3. Run a 3/8 in. / 9.5 mm outer diameter or larger pilot supply line from the upstream pipeline to the filter inlet. Do not make the upstream pipeline connection in a turbulent area, such as near a nipple, swage, or elbow. If the maximum pilot inlet pressure could exceed the pilot rating, install a separate reducing regulator in the pilot supply line. Install a hand valve in the pilot supply line, and provide vent valves to properly isolate and relieve the pressure from the regulator. CAUTION ! WARNING Introduce pilot supply pressure into the regulator before introducing any downstream pressure, or internal damage may occur due to reverse pressurization of the pilot and main valve components. 3 6350 Series 4. Pressure setting of pilot control spring: Turning the adjusting screw clockwise into the spring case increases the spring compression and pressure setting. Turning the adjusting screw counterclockwise decreases the spring compression and pressure setting. Pilot Adjustment To adjust standard 6350 Series pilots: loosen the locknut and turn the adjusting screw. Then tighten the locknut to maintain the adjustment position. A closing cap must be removed before adjustment and replaced afterward. To avoid possible personal injury from a pressure-loaded pilot, carefully vent the spring case before removing the closing cap. Otherwise, trapped loading pressure could forcefully eject the freed closing cap. Maintenance Pilot parts are subject to normal wear and must be inspected and replaced as necessary. The frequency of inspection and replacement of parts depends upon the severity of service conditions or the requirements of local, state, and federal regulations. Due to the care FisherTM takes in meeting all manufacturing requirements (heat treating, dimensional tolerances, etc.), use only replacement parts manufactured or furnished by Fisher. All O-rings, gaskets, and seals should be lubricated with a good grade of general purpose grease and installed gently rather than forced into position. Be certain that the nameplates are updated to accurately indicate any field changes in equipment, materials, service conditions, or pressure settings. To avoid personal injury resulting from sudden release of pressure, isolate the regulator from all pressure and cautiously release trapped pressure from the regulator before attempting disassembly.

Note 6350 Series Type 6351 Pilot Perform this procedure if changing the control spring for one of a different range, or if inspecting, cleaning, or replacing any other pilot parts. Pilot key numbers The body (key 1) may remain on the pipe nipple (key 21, Figure 3) unless the entire pilot is replaced. are referenced in Figure 2.1. To gain access to the diaphragm assembly (key 5), Note The body assembly (key 1) may remain on the pipe nipple (key 22, Figure 2) unless the entire pilot is replaced. diaphragm limiter (key 23) if used, control spring (key 6), restriction (key 22), stem guide (key 8), or spring seat (key 7), remove the closing cap (key 11), loosen the locknut (key 10), and turn the adjusting screw (key 9) counterclockwise until 1. To gain access to the diaphragm assembly (key 7), control spring (key 9), or spring seat (key 8), loosen the locknut (key 11, and turn the adjusting compression is removed from the spring. Remove the machine screws (key 14), and separate the body from the spring case (key 2). screw (key 10) out until compression is removed from the spring. Remove the machine screws (key 12), and separate the body assembly from the spring case. 2. Inspect the removed parts, and replace as necessary. Make sure the restriction and the registration hole in the body are free from debris. After assembly, make sure of the proper control 2. Inspect the removed parts and replace as necessary. Ensure the registration and bleed spring setting according to the Startup section, and remark the spring case if necessary. holes in the pilot body are free of debris. After assembly, make sure of the proper control spring setting according to the Startup section and remark the spring case if necessary. 3. To replace the valve plug (key 4) or bellows O-ring (key 17), remove the body plug (key 3) and body plug gasket (key 12). Be careful to keep the bellows assembly (key 16) from falling out and possibly 3. To replace the valve plug (key 4), remove the body plug (key 3) to let the valve spring (key 6) and inner valve assembly (key 4) drop freely from the body (key 1). Inspect the removed parts, getting lost while removing the valve plug. Inspect the removed parts, and replace as necessary. Make sure the valve plug seating surfaces are free from debris. replace if necessary. Make sure the plug seating surfaces are free from debris. Inspect body plug O-ring, replace if necessary. Type 6351 pilots manufactured before May 1999 need to have the body plug gasket and the body plug replaced with a new body plug assembly (key 3), which includes the body plug and the body plug O-ring. Install the body plug O-ring over the body plug. Stack the Parts Ordering Each 6350 Series pilot is assigned a serial number or FS number which can be found on the nameplates. Refer to this number when contacting your local Sales Office for assistance, or when ordering replacement parts. valve spring (key 6) and the inner valve assembly When ordering a replacement part, be sure to (key 4) on the body plug assembly (key 3), and include the complete 11-character part number install the body plug assembly with stacked parts from the following parts list. Some commonly used into the body (key 1). trim packages can be ordered according to the 11-character assembly number given in the parts kits Types 6352 through 6354M Pilots listed in the Parts List. Perform this procedure if changing the control spring for one of a different range, or if inspecting, cleaning, or replacing any other pilot parts. Pilot part key numbers are referenced in Figure 3. 4 Parts List Type 6351 Pilot (Figure 2) Key Description Part Number Parts Kit (includes keys 3, 4, 6, 7 and for the P590 Series filter, keys 2 and 7) R6351X00012 1 Body Assembly Aluminum with brass bushing 1B7971X0092 Aluminum with Stainless steel bushing (NACE) 1B7971X0342 Stainless steel with Stainless steel bushing 1B7971X0122 2 Bonnet Aluminum with closing cap 25A6220X012 3 Body Plug Assembly (includes body plug and O-ring) Aluminum body plug with Nitrile (NBR) O-ring 18B6542X022 with Fluorocarbon (FKM) O-ring 18B6542X042 Stainless steel body plug with Nitrile (NBR) O-ring 18B6542X052 with Fluorocarbon (FKM) O-ring 18B6542X062 4 Inner Valve Assembly Nitrile (NBR) with brass stem 20B9389X012 Nitrile (NBR) with Stainless steel stem 20B9389X022 Nitrile (NBR) with Stainless steel stem (NACE) 20B9389X022 Fluorocarbon (FKM) with Stainless steel stem 20B9389X042 Fluorocarbon (FKM) with brass stem 29B9389X032 6 Valve Spring For brass and Stainless steel stems 1B797937022 For Stainless steel stem (NACE) 19A2860X012 7* Diaphragm Assembly (includes plated steel diaphragm plate) Nitrile (NBR) diaphragm and Aluminum pusher post 1B7980000B2 Nitrile (NBR) diaphragm and Stainless steel pusher post 1B7980X00A2 Fluorocarbon (FKM) diaphragm and Aluminum pusher post 1B7980000C2 8 Upper Spring Seat 1B798525062 9 Control Spring, plated steel 2 to 10 psig / 0.14 to 0.69 bar range, (Types S301F and S301D) 14A9673X012 2 to 20 psig / 0.14 to 1.4 bar range, (Types S301F and S301D) 1B788327022 3 to 20 psig / 0.21 to 1.4 bar range, Green 1B986027212 5 to 35 psig / 0.35 to 2.4 bar range, Silver 1B788327022 35 to 100 psig / 2.4 to 6.9 bar range, Red 1K748527202 10 Adjusting Screw Aluminum bonnet 10B7192X012 Aluminum bonnet with 2 to 10 psi / 0.14 to 0.69 bar spring range 1H305028982 11 Locknut, plated steel (not used with Type 661) Aluminum 1A946324122 Aluminum bonnet with 2 to 10 psi / 0.14 to 0.69 bar spring range 1C724018992 12 Machine Screw, steel (6 required) T13305T0012 13 Hex Lock Plate, Aluminum 10B2695X012 14 Threaded Lock Plate, Aluminum 10B2696X012 Key Description Part Number 22 Pipe Nipple, Standard and Corrosive service, Galvanized plated steel (use with P590 Series) 1C488226232 Steel (NACE) 1C4882X0032 24 Filter P590 Series (standard) Type P514-1 P590 Series for NACE service Type P513-1 28 Closing Cap Aluminum bonnet (plastic cap) 23B9152X012 35 Vent Assembly Type Y602-12 42 Relief Valve Assembly Aluminum/302 Stainless steel (NACE) 16A5929X042 Aluminum/Stainless steel (Types S301D and S301F) 16A5929X012 All other assemblies 16A5929X022 43 Closing Cap Gasket Types S301D and S301F NPT TAP 15A6218X012 Types 6352, 6353, 6354L, 6354M, and 6354H Pilots (Figure 3) Key Description Part Number Parts kit (included are: valve plug, key 4; Diaphragm assembly, key 5; body plug gasket, key 12; Bellows O-ring, key 17; closing cap gasket, key 20; and for the P590 Series filter, filter element, key 2; and gasket, key 7) Type 6352 R6352X00012 Type 6353 R6353X00012 Type 6354 R6354X00012 1 Pilot Body Aluminum 35A6228X012 Aluminum with 50 psig / 3.4 bar Type 1806H Relief 17A8075X012 Stainless steel 39A5971X012 Stainless steel with 50 psig / 3.4 bar Type 1806H relief 17A8075X022 2 Spring Case Aluminum 25A6220X012 Stainless steel 28A9277X012 3 Body Plug Aluminum 15A6221X012 316 Stainless steel 15A6221X042 4 Valve Plug and Stem Assembly Nitrile (NBR) disk with Stainless steel stem (standard) 15A6207X012 Nitrile (NBR) disk with 316 Stainless steel stem (NACE) 15A6207X052 Fluorocarbon (FKM) with Stainless steel stem (for use in Oxygen service) 15A6207X042 Fluorocarbon (FKM) disk with 316 Stainless steel stem (NACE) 15A6207X112 *Recommended spare part. 1. NACE International Standard MR0175. 2. Part included in trim package assembly can be ordered according to the parts kit trim package. - continued - 5

6350 Series Key 6350 Series Types 6352, 6353, 6354L, 6354M, and 6354H Pilots (Figure 3) (continued) Key Description Part Number Description Part Number 5 Diaphragm Assembly 13 Vent Assembly Type Y602-12 Type 6352, Nitrile (NBR) 15A6216X012 14 Machine Screw (6 required) Type 6353, Nitrile (NBR) 15A6216X022 Aluminum 10B6189X022 Type 6353, Fluorocarbon (FKM) 15A6216X092 Stainless steel 1V4360X0022 Type 6353, Fluorocarbon (FKM) 15 Relief Valve Assembly (for use in Oxygen service) 15A6216X162 25 psig / 1.7 bar 16A5929X052 Type 6354, Neoprene (CR) 15A6216X032 25 psig / 1.7 bar (NACE) 16A5929X042 Type 6354, Fluorocarbon (FKM) 15A6216X152 25 psig / 1.7 bar (for Oxygen service) 16A5929X032 Type 6352 (NACE), Nitrile (NBR) 15A6216X552 25 psig / 1.7 bar (Stainless steel) 16A5929X072 Type 6353 (NACE), Nitrile (NBR) 15A6216X542 16* Bellows Assembly Type 6353 (NACE), Fluorocarbon (FKM) 15A6216X562 Standard for all except in Oxygen service 15A6202X032 Type 6354 (NACE), Neoprene (CR) 15A6216X572 For use in Oxygen service 15A6202X022 Type 6354 (NACE), Fluorocarbon (FKM) 15A6216X582 17* O-ring 6 Control Spring Standard for all except in Oxygen service 1D682506992 Type 6352 For use in Oxygen service, Fluorocarbon (FKM) 1D6825X0012 14 in. w.c. to 2 psig / 35 mbar to 0.14 bar 14A9672X012 19 Filter 2 to 10 psig / 0.14 to 0.69 bar, Black 14A9673X012 P590 Series (standard) Type P514-1 DVGW 4 to 10 psig / 0.28 to 0.69 bar 14A9673X012 P590 Series for NACE service Type P513-1 Type 6353 20 Closing Cap Gasket 15A6218X012 3 to 40 psig / 0.21 to 2.8 bar 1E392527022 21 Pipe Nipple 35 to 125 psig / 2.4 to 8.6 bar 1K748527202 For standard and corrosive service 1C488226232 DVGW 10 to 40 psig / 0.69 to 2.8 bar 1E392527022 For NACE service 1C4882X0032 DVGW 40 to 58 psig / 2.8 to 4.0 bar 1K748527022 For corrosive NACE service 1C488238982 Type 6354L 22 Restriction 85 to 200 psig / 5.9 to 13.8 bar 1L346127142 Standard 17A2030X012 Type 6354M High 17A2029X012 175 to 220 psig / 12.1 to 15.2 bar 1L346127142 23 Diaphragm Limiter Type 6354H Aluminum 15A9259X012 200 to 300 psig / 13.8 to 20.7 bar 15A9258X012 Stainless steel 10B4407X012 7 Spring Seat 26 NACE Tag 19A6034X012 Type 6352 or 6353 1B798525062 27 Tag Wire 1U7581X0022 Type 6354L, 6354M, or 6354H 1K155828982 8 Stem Guide 416 Stainless steel (standard) 410 Stainless steel (NACE) 9 Adjusting Screw 15A6222X012 15A6222X022 The following parts are for Type 6353 only (not shown in Figure 3) Type 6352 Type 6353 10B3692X012 10B7192X012 Key Description Part Number Type 6354 10 Locknut Type 6352 Type 6353 or 6354 11 Closing Cap Aluminum spring case Stainless steel spring case 12 Body Plug Gasket / O-ring For Aluminum, composition For Stainless steel body, Nitrile (NBR) For Stainless steel body, Fluorocarbon (FKM) 10B6190X012 28 Packing Bonnet 1C724018992 1A946324122 29 Packing Nut 30 Handwheel 31 Washer 23B9152X012 1H2369X0032 32 Screw 33 Packing Spring 34 Packing Box Gasket 1C495704022 1F113906992 1N463906382 35* Packing Follower 36* Male Adaptor 37* Female Adaptor 38* Packing Washer 1L449635072 0P077624102 1L217544992 1A329128982 1E985428982 1F125437012 1B487099202 1K885035072 1F124801012 1F124401012 1F125236042 39* Packing Ring (3 required) 1C752601012 40 Adjusting Screw 21B5621X012 *Recommended spare part. 1. NACE International Standard MR0175. 2. Part included in trim package assembly can be ordered according to the parts kit trim package. 6 CB7988 23 1011289127122 242334A6635-B 4 6 3 3 OLD TYPE 6351 ASSEMBLY DRAWING SHOWING OLD BODY PLUG AND BODY PLUG GASKET 42 NEW TYPE 6351 ASSEMBLY DRAWING SHOWING NEW BODY PLUG AND BODY PLUG O-RING 1191022071465152281413 3 16 35A8889 35A6236 19 21 12 17 DETAIL OF TYPE 6354M OR 6354H PILOT COMPLETE TYPE 6352, 6353, OR 6354L PILOT Figure 3. Types 6352 through 6354H Pilot Assemblies 7 6350 Series Figure 2. Type 6351 Pilot Assembly 6350 Series Webadmin.Regulators@emerson.com Facebook.com/EmersonAutomationSolutions Fisher.com LinkedIn.com/company/emerson-automation-solutions Twitter.com/emr_automation Emerson Automation Solutions Americas McKinney, Texas 75070 USA T +1 800 558 5853 +1 972 548 3574 Europe Bologna 40013, Italy T +39 051 419 0611 D103153X012 © 2008, 2019 Emerson Process Management Regulator Technologies, Inc. All rights reserved. 07/19. The Emerson logo is a trademark and service mark of Emerson Electric Co. All other marks are the property of their prospective owners. FisherTM is a mark owned by Fisher Controls International LLC, a business Asia Pacific of Emerson Automation Solutions. Singapore 128461, Singapore T +65 6777 8211 The contents of this publication are presented for informational purposes only, and while every effort has been made to ensure their accuracy, they are not to be construed as warranties or guarantees, express or Middle East and Africa Dubai, United Arab Emirates implied, regarding the products or services described herein or their use or applicability. All sales are governed by our terms and conditions, which are available upon request. We reserve the right to modify or improve the T +971 4 811 8100 designs or specifications of such products at any time without notice. Emerson Process Management Regulator Technologies, Inc does not assume responsibility for the selection, use or maintenance of any product. Responsibility for proper selection, use and maintenance of any Emerson Process Management Regulator Technologies, Inc. product remains solely with the purchaser.


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