EMERSON FISHER 6353 User Manual

Instruction Manual  
D103153X012  
6350 Series  
July 2019  
6350 Series Pilots for Pilot-Operated Pressure  
Reducing Regulators  
BELLOWS  
VALVE PLUG SPRING  
BLEED HOLE  
BALANCED VALVE PLUG  
REMOVABLE  
VENT  
SCREW-IN BLEED  
RESTRICTION  
UNBALANCED  
VALVE PLUG  
W3160-2*  
W3149-1*  
DETAIL OF TYPE 6352,  
6353, OR 6354L PILOT  
DETAIL OF  
TYPE 6351 PILOT  
W6956  
TYPE 6350 SERIES ON A  
TYPE 1098-EGR REGULATOR  
Figure 1. 6350 Series Pressure Reducing Pilot Constructions  
Introduction  
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.  
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  
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.  
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.  
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.  
!
WARNING  
In hazardous or flammable gas service,  
vented gas may accumulate, and cause  
personal injury, death, or property  
damage due to fire or explosion.  
!
WARNING  
Vent a regulator in hazardous gas  
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.  
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.  
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.  
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 Fisher™ takes in meeting all manufacturing  
requirements (heat treating, dimensional tolerances,  
etc.), use only replacement parts manufactured or  
furnished by Fisher.  
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.  
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.  
!
WARNING  
CAUTION  
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.  
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  
Note  
Type 6351 Pilot  
The body (key 1) may remain on the  
pipe nipple (key 21, Figure 3) unless the  
entire pilot is replaced.  
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  
are referenced in Figure 2.  
1. To gain access to the diaphragm assembly (key 5),  
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  
compression is removed from the spring. Remove  
the machine screws (key 14), and separate the  
body from the spring case (key 2).  
Note  
The body assembly (key 1) may remain  
on the pipe nipple (key 22, Figure 2)  
unless the entire pilot is replaced.  
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  
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  
spring setting according to the Startup section, and  
remark the spring case if necessary.  
2. Inspect the removed parts and replace as  
necessary. Ensure the registration and bleed  
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  
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.  
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,  
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  
valve spring (key 6) and the inner valve assembly  
(key 4) on the body plug assembly (key 3), and  
install the body plug assembly with stacked parts  
into the body (key 1).  
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.  
When ordering a replacement part, be sure to  
include the complete 11-character part number  
from the following parts list. Some commonly used  
trim packages can be ordered according to the  
11-character assembly number given in the parts kits  
listed in the Parts List.  
Types 6352 through 6354M Pilots  
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
6350 Series  
Parts List  
Type 6351 Pilot (Figure 2)  
Key Description  
Part Number  
Key Description  
Part Number  
22  
Pipe Nipple,  
Standard and Corrosive service,  
Galvanized plated steel (use with P590 Series)  
Steel (NACE)  
Filter  
P590 Series (standard)  
P590 Series for NACE service  
Closing Cap  
Aluminum bonnet (plastic cap)  
Vent Assembly  
Relief Valve Assembly  
Aluminum/302 Stainless steel (NACE)  
Aluminum/Stainless steel  
(Types S301D and S301F)  
All other assemblies  
Parts Kit (includes keys 3, 4, 6, 7 and  
for the P590 Series filter, keys 2 and 7)  
R6351X00012  
1C488226232  
1C4882X0032  
1
Body Assembly  
Aluminum with brass bushing  
Aluminum with Stainless steel bushing (NACE)  
Stainless steel with Stainless steel bushing  
1B7971X0092  
1B7971X0342  
1B7971X0122  
24  
28  
Type P514-1  
Type P513-1  
2
3
Bonnet  
Aluminum with closing cap  
25A6220X012  
23B9152X012  
Type Y602-12  
Body Plug Assembly (includes body plug  
and O-ring)  
Aluminum body plug  
with Nitrile (NBR) O-ring  
with Fluorocarbon (FKM) O-ring  
Stainless steel body plug  
with Nitrile (NBR) O-ring  
with Fluorocarbon (FKM) O-ring  
35  
42  
16A5929X042  
18B6542X022  
18B6542X042  
16A5929X012  
16A5929X022  
18B6542X052  
18B6542X062  
43  
Closing Cap Gasket  
Types S301D and S301F NPT TAP  
15A6218X012  
4
Inner Valve Assembly  
Nitrile (NBR) with brass stem  
20B9389X012  
20B9389X022  
20B9389X022  
20B9389X042  
29B9389X032  
Nitrile (NBR) with Stainless steel stem  
Nitrile (NBR) with Stainless steel stem (NACE)  
Fluorocarbon (FKM) with Stainless steel stem  
Fluorocarbon (FKM) with brass stem  
Types 6352, 6353, 6354L, 6354M, and  
6354H Pilots (Figure 3)  
6
Valve Spring  
Key Description  
Part Number  
For brass and Stainless steel stems  
For Stainless steel stem (NACE)  
Diaphragm Assembly  
(includes plated steel diaphragm plate)  
Nitrile (NBR) diaphragm and  
Aluminum pusher post  
Nitrile (NBR) diaphragm and  
Stainless steel pusher post  
Fluorocarbon (FKM) diaphragm and  
Aluminum pusher post  
1B797937022  
19A2860X012  
Parts kit (included are: valve plug, key 4; Diaphragm  
7*  
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)  
1B7980000B2  
1B7980X00A2  
Type 6352  
Type 6353  
Type 6354  
Pilot Body  
Aluminum  
R6352X00012  
R6353X00012  
R6354X00012  
1
1B7980000C2  
1B798525062  
35A6228X012  
8
9
Upper Spring Seat  
Aluminum with 50 psig / 3.4 bar Type 1806H Relief 17A8075X012  
Control Spring, plated steel  
2 to 10 psig / 0.14 to 0.69 bar range,  
(Types S301F and S301D)  
2 to 20 psig / 0.14 to 1.4 bar range,  
(Types S301F and S301D)  
3 to 20 psig / 0.21 to 1.4 bar range, Green  
5 to 35 psig / 0.35 to 2.4 bar range, Silver  
35 to 100 psig / 2.4 to 6.9 bar range, Red  
Adjusting Screw  
Stainless steel  
39A5971X012  
Stainless steel with 50 psig / 3.4 bar  
Type 1806H relief  
Spring Case  
Aluminum  
Stainless steel  
Body Plug  
Aluminum  
316 Stainless steel  
Valve Plug and Stem Assembly  
14A9673X012  
17A8075X022  
2
3
4
1B788327022  
1B986027212  
1B788327022  
1K748527202  
25A6220X012  
28A9277X012  
15A6221X012  
15A6221X042  
10  
11  
Aluminum bonnet  
10B7192X012  
1H305028982  
1A946324122  
Aluminum bonnet with 2 to 10 psi /  
0.14 to 0.69 bar spring range  
Locknut, plated steel (not used with Type 661)  
Aluminum  
Aluminum bonnet with 2 to 10 psi /  
0.14 to 0.69 bar spring range  
Nitrile (NBR) disk with Stainless steel stem (standard) 15A6207X012  
Nitrile (NBR) disk with 316 Stainless steel  
stem (NACE)  
Fluorocarbon (FKM) with Stainless steel stem  
(for use in Oxygen service)  
Fluorocarbon (FKM) disk with 316 Stainless steel  
stem (NACE)  
15A6207X052  
15A6207X042  
15A6207X112  
1C724018992  
T13305T0012  
10B2695X012  
10B2696X012  
12  
13  
14  
Machine Screw, steel (6 required)  
Hex Lock Plate, Aluminum  
Threaded Lock Plate, Aluminum  
- continued -  
*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.  
5
6350 Series  
Types 6352, 6353, 6354L, 6354M, and  
6354H Pilots (Figure 3) (continued)  
Key Description  
Part Number  
Key Description  
Part Number  
5 Diaphragm Assembly  
13  
14  
Vent Assembly  
Machine Screw (6 required)  
Aluminum  
Stainless steel  
Relief Valve Assembly  
25 psig / 1.7 bar  
25 psig / 1.7 bar (NACE)  
25 psig / 1.7 bar (for Oxygen service)  
25 psig / 1.7 bar (Stainless steel)  
Type Y602-12  
Type 6352, Nitrile (NBR)  
Type 6353, Nitrile (NBR)  
Type 6353, Fluorocarbon (FKM)  
Type 6353, Fluorocarbon (FKM)  
(for use in Oxygen service)  
Type 6354, Neoprene (CR)  
Type 6354, Fluorocarbon (FKM)  
Type 6352 (NACE), Nitrile (NBR)  
Type 6353 (NACE), Nitrile (NBR)  
Type 6353 (NACE), Fluorocarbon (FKM)  
Type 6354 (NACE), Neoprene (CR)  
Type 6354 (NACE), Fluorocarbon (FKM)  
Control Spring  
15A6216X012  
15A6216X022  
15A6216X092  
10B6189X022  
1V4360X0022  
15  
15A6216X162  
15A6216X032  
15A6216X152  
15A6216X552  
15A6216X542  
15A6216X562  
15A6216X572  
15A6216X582  
16A5929X052  
16A5929X042  
16A5929X032  
16A5929X072  
16* Bellows Assembly  
Standard for all except in Oxygen service  
For use in Oxygen service  
17* O-ring  
15A6202X032  
15A6202X022  
6
Standard for all except in Oxygen service  
For use in Oxygen service, Fluorocarbon (FKM)  
Filter  
P590 Series (standard)  
P590 Series for NACE service  
Closing Cap Gasket  
Pipe Nipple  
For standard and corrosive service  
For NACE service  
For corrosive NACE service  
Restriction  
Standard  
High  
Diaphragm Limiter  
Aluminum  
Stainless steel  
1D682506992  
1D6825X0012  
Type 6352  
14 in. w.c. to 2 psig / 35 mbar to 0.14 bar  
2 to 10 psig / 0.14 to 0.69 bar, Black  
DVGW 4 to 10 psig / 0.28 to 0.69 bar  
Type 6353  
3 to 40 psig / 0.21 to 2.8 bar  
35 to 125 psig / 2.4 to 8.6 bar  
DVGW 10 to 40 psig / 0.69 to 2.8 bar  
DVGW 40 to 58 psig / 2.8 to 4.0 bar  
Type 6354L  
85 to 200 psig / 5.9 to 13.8 bar  
Type 6354M  
175 to 220 psig / 12.1 to 15.2 bar  
Type 6354H  
14A9672X012  
14A9673X012  
14A9673X012  
19  
Type P514-1  
Type P513-1  
15A6218X012  
20  
21  
1E392527022  
1K748527202  
1E392527022  
1K748527022  
1C488226232  
1C4882X0032  
1C488238982  
22  
23  
1L346127142  
1L346127142  
15A9258X012  
17A2030X012  
17A2029X012  
15A9259X012  
10B4407X012  
19A6034X012  
1U7581X0022  
200 to 300 psig / 13.8 to 20.7 bar  
Spring Seat  
Type 6352 or 6353  
Type 6354L, 6354M, or 6354H  
Stem Guide  
416 Stainless steel (standard)  
410 Stainless steel (NACE)  
Adjusting Screw  
7
8
9
26  
27  
NACE Tag  
Tag Wire  
1B798525062  
1K155828982  
15A6222X012  
15A6222X022  
The following parts are for Type 6353  
only (not shown in Figure 3)  
Type 6352  
Type 6353  
Type 6354  
10B3692X012  
10B7192X012  
10B6190X012  
Key Description  
Part Number  
28  
29  
30  
31  
32  
33  
34  
Packing Bonnet  
Packing Nut  
Handwheel  
Washer  
Screw  
1L449635072  
0P077624102  
1L217544992  
1A329128982  
1E985428982  
1F125437012  
1B487099202  
1K885035072  
1F124801012  
1F124401012  
1F125236042  
1C752601012  
21B5621X012  
10  
11  
12  
Locknut  
Type 6352  
Type 6353 or 6354  
Closing Cap  
1C724018992  
1A946324122  
Aluminum spring case  
23B9152X012  
1H2369X0032  
Packing Spring  
Packing Box Gasket  
Stainless steel spring case  
Body Plug Gasket / O-ring  
For Aluminum, composition  
For Stainless steel body, Nitrile (NBR)  
For Stainless steel body, Fluorocarbon (FKM)  
35* Packing Follower  
36* Male Adaptor  
37* Female Adaptor  
38* Packing Washer  
39* Packing Ring (3 required)  
1C495704022  
1F113906992  
1N463906382  
40  
Adjusting Screw  
*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
6350 Series  
10  
2
11  
8
9
12  
1
7
22  
24  
4
34A6635-B  
23  
3
6
3
CB7988  
NEW TYPE 6351 ASSEMBLY DRAWING  
SHOWING NEW BODY PLUG  
AND BODY PLUG O-RING  
OLD TYPE 6351 ASSEMBLY DRAWING  
SHOWING OLD BODY PLUG AND BODY PLUG GASKET  
42  
Figure 2. Type 6351 Pilot Assembly  
11  
9
10  
20  
2
14  
15  
1
7
5
6
22  
4
8
23  
13  
3
16  
35A8889  
35A6236  
21  
12  
19  
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  
D103153X012 © 2008, 2019 Emerson Process Management Regulator  
Technologies, Inc. All rights reserved. 07/19.  
Emerson Automation Solutions  
The Emerson logo is a trademark and service mark of Emerson Electric  
Co. All other marks are the property of their prospective owners.  
Fisher™ is a mark owned by Fisher Controls International LLC, a business  
of Emerson Automation Solutions.  
Americas  
Asia Pacific  
McKinney, Texas 75070 USA  
T +1 800 558 5853  
+1 972 548 3574  
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  
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  
designs or specifications of such products at any time without notice.  
Europe  
Bologna 40013, Italy  
T +39 051 419 0611  
Middle East and Africa  
Dubai, United Arab Emirates  
T +971 4 811 8100  
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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