Emerson 1808A Instruction Manual

Instruction Manual
Form 5116

July 2010

Types 1808 and 1808A

Types 1808 and 1808A Pilot-Operated Relief
Valves or Backpressure Regulators

WARNING

!

Failure to follow these instructions or
to properly install and maintain this
equipment could result in an explosion

and/or re causing property damage and

personal injury or death.

®

Fisher
relief valves must be installed, operated,
and maintained in accordance with
federal, state, and local codes, rules
and regulations, and Emerson Process
Management Regulator Technologies,
Inc. instructions.

backpressure regulators or

W3716

TYPE 1808 GLOBE-BODY

If a leak develops or if the outlet
continually vents gas, service to the
unit may be required. Failure to correct
trouble could result in a hazardous

condition. Only a qualied person must

install or service the unit.

Call a gas service person to service

the unit. Only a qualied person must

install or service the regulator.

Introduction

Scope of the Manual

This manual provides installation, adjustment,
maintenance, and parts ordering information for
Types 1808 and 1808A pilot-operated relief valves or
backpressure regulators. The manual also includes
coverage of the Types 6358 and 6358B pilots and, if

used, a P590 Series lter. Instructions and parts lists

for other equipment used with these regulators are
found in separate manuals.

Description

Types 1808 globe-body and 1808A angle-body,
pilot-operated backpressure regulators or relief valves

W3507

TYPE 1808A ANGLE-BODY

Figure 1. Types 1808 and 1808A Pilot-Operated
Relief Valves or Backpressure Regulators

are economical, compact devices used in either
gas or liquid service to maintain pressure on oil and
gas separators and in pressure relief applications
in gas distribution systems. The Type 6358 pilot is
used in backpressure regulation and pressure relief
applications throughout the oil and gas production
industry, and is used in either gas or liquid service.
Pressure relief and liquid service applications in

www.sherregulators.com

D100347X012

Types 1808 and 1808A

Specications

Body Size and End Connection Style

2 NPT

Maximum Relief (Inlet) Pressure

(1)

150 psig (10,3 bar) including buildup

Set Pressure Ranges

See Table 1

Differential Pressures
Maximum: 125 psig (8,6 bar)
Minimum: 5 psig (0,34 bar)

Type 6358 Pilot Bleed

Bleeds only when repositioning the main valve

Type 6358B Pilot Bleed

Continuously bleeds while inlet pressure is above
set pressure

Pressure Registration
Internal (standard) or External (optional)

Pilot Tubing and Connections

1/4 NPT with or without P590 Series lter

Temperature Capabilities

(2)

-20° to 180°F (-29° to 82°C)

Approximate Weights
Type 1808: 22 pounds (10 kg)
Type 1808A: 25 pounds (11 kg)

Options

• Upstream control line construction

• Pressure gauge (0 to 160 psig/0 to 11,0 bar/
0 to 1,1 MPa)

• P590 Series Pilot Supply Filter

Flow and Sizing Coefcients

See Table 2

1. The pressure/temperature limits in this Instruction Manual and any applicable standard or code limitation should not be exceeded.

Table 1. Types 6358 and 6358B Set Pressure Ranges, Pressure Ratings, and Pilot Spring Information

SET PRESSURE RANGES,

PSIG (bar)

3 to 18

(0,21 to 1,2)

15 to 40

35 to 125

(1,0 to 2,8)
(2,4 to 8,6)

Part Number Color

1B986027212
1E392527022
1K748527202

Green
Yellow

PILOT SPRING INFORMATION

Red

Wire Diameter,

Inches (mm)

0.120

(3,05)

0.148

(3,76)

0.192

(4,88)

Free Length,
Inches (mm)

2.12

(54,0)

2.00

(51,0)

2.19

(55,6)

Table 2. Types 1808 and 1808A Flow Coefcients

FLOW COEFFICIENTS

TYPE

1808 1410 40.1 0.79 35.2 0.78 0.50 0.89

1808A 1800 51.4 0.76 35.0 0.78 0.50 0.87

the oil and gas industry are typically handled by the
Type 6358B pilot. With either pilot, the set pressure
is varied to individual requirements by the adjusting
screw on the pilot. Pilot exhaust can be piped into the
downstream line or vented into the atmosphere on gas

(WIDE-OPEN)

C

g

K

C

v

m

C

1

diameter is indicated by a letter stamped on the
bottom of the pilot body next to the tapped side outlet:
an H for the yellow high-gain restriction and an L for
the blue low-gain restriction. The pilot spring range
appears on the pilot spring case.

IEC SIZING COEFFICIENTS

X

T

F

D

service and should be piped downstream or to a safe
location on liquid service.

Specications

Principle of Operation

A pressure relief valve is a control device that opens

to relieve uid to atmosphere during an overpressure

The Specications section provides ratings and
specications for Types 1808 and 1808A relief

valves or backpressure regulators. Some of the

specications for a given unit as it comes from the

factory appear on the nameplate attached to the upper
diaphragm case. The Type 6358B pilot restriction

occurrence. A backpressure regulator is a control
device that maintains a constant upstream pressure

throughout a given ow range. It functions in the same

manner as a relief valve that opens on increasing
upstream pressure. The Type 1808 or 1808A cannot

be used as an ASME safety relief valves.

F

L

2

UPPER PORTION
OF VALVE PLUG

TO EXHAUST
PORT

LOWER PORTION
OF VALVE PLUG

TO MAIN VALVE
DIAPHRAGM

DIAPHRAGM
ASSEMBLY

HOLLOW
PASSAGE
IN VALVE
PLUG STEM

RESTRICTION PLUG

Types 1808 and 1808A

PILOT EXHAUST

PILOT

TYPE 6358 BACKPRESSURE SERVICE

UPPER PORTION
OF VALVE PLUG

TO EXHAUST
PORT

LOWER PORTION
OF VALVE PLUG

TO MAIN VALVE
DIAPHRAGM

INLET PRESSURE
ATMOSPHERIC PRESSURE
OUTLET/EXHAUST PRESSURE
LOADING PRESSURE

E0075

TYPE 6358B RELIEF SERVICE

DIAPHRAGM
ASSEMBLY

HOLLOW
PASSAGE
IN VALVE
PLUG STEM

FIXED RESTRICTION

Figure 2. Type 1808 with 6358 Series Operational Schematics

Relief Valve

As long as the inlet pressure is below set pressure,
the pilot control spring keeps the valve plug closed.

Inlet pressure passes through the pilot restriction and

registers as loading pressure on top of the diaphragm.
Force from the main spring, in addition to inlet pressure
bleeding through the pilot restriction, provide downward
loading pressure to keep the main valve closed.

SPRING

DIAPHRAGM

VALVE PLUG

MAIN VALVE

Backpressure Regulator

As long as inlet pressure remains below setpoint, the

pilot spring keeps the valve plug closed. Inlet pressure

passes through the upper port around the upper portion
of the valve plug then through the hollow passage in that
valve plug. Force from the main spring, along with inlet
pressure bleeding through the pilot, provide downward
loading pressure to keep the main valve closed.

When the inlet pressure rises above the set pressure,
the pressure on the pilot diaphragm overcomes the
pilot control spring and opens the pilot valve plug. The
pilot then exhausts the loading pressure from the top
of the main valve diaphragm. The pilot continuously
exhausts gas when the inlet pressure is above the set
pressure. The inlet pressure unbalance overcomes
the main spring force and opens the main valve.

As the inlet pressure drops, the pilot control spring begins
to close the pilot valve plug and the exhaust slows. This
causes the inlet pressure to build in the main valve
diaphragm casing, allowing the control spring to close
the main valve. Once the main valve is closed, the pilot
valve plug closes and the exhaust stops.

When inlet pressure rises above the set pressure,
pressure on the pilot diaphragm overcomes the control
spring to close the upper port and stroke the valve
plug to open the lower port. The pilot then exhausts
loading pressure from the top of the main valve
diaphragm. The pilot exhausts only while repositioning
the main valve. The inlet pressure unbalance
overcomes the spring force and opens the main valve.

As the inlet pressure drops, the pilot control spring
begins to close the pilot valve plug and the exhaust
slows. This causes the inlet pressure to build in the
main valve diaphragm casing, allowing the control spring
to close the main valve. Once the main valve is closed,
the pilot valve plug closes and the exhaust stops.

3

Types 1808 and 1808A

Installation

WARNING

!

Installing a Type 1808 or 1808A where its
capabilities can be exceeded or where
proper operation might be impaired
may cause personal injury, property
damage, or leakage due to bursting of
pressure-containing parts or explosion of
accumulated gas or liquid. To avoid such
conditions, install the Type 1808 or 1808A
backpressure regulator or relief valve
where service conditions are within the

unit capabilities given in the Specications

section and unit is protected from
exposure to physical damage and/or
corrosive substances.

1. When installing the relief valve or backpressure
regulator, make sure that the system installation
complies with applicable local, state, and federal
codes and regulations.

2. Use qualied personnel when installing, operating,

and maintaining the relief valve or backpressure
regulator. Before installing the unit, inspect the
main valve body, pilot, and pipelines for any
damage or foreign material that may have
collected. Apply pipe compound to the external
pipeline threads only. Do not use pipe compound
on any internal threads.

3. The relief valve or backpressure regulator may

be installed in any position as long as pipeline ow
complies with the ow arrow on the main valve

body (Type 1808) or runs in through the bottom
connection and out the side connection
(Type 1808A). Superior performance may be
obtained by disconnecting the pilot supply tubing
from the elbow (key 36, Figures 3 and 4),
removing the elbow, installing 1/4 NPT pipe plug
into the lower casing (key 2), and connecting the

pilot supply tubing to an upstream location.

WARNING

!

Types 1808 and 1808A relief valves or
backpressure regulators vent gas or
liquid from the main valve outlet, pilot
exhaust, and pilot vent. In hazardous

or ammable gas or liquid service,

personal injury or property damage may

occur due to re or explosion of vented

gas or liquid that has accumulated.

To prevent such injury and damage,
provide piping or tubing to vent the gas
to a well ventilated location. Also, when
venting a hazardous gas or liquid, piping
or tubing should be located far enough
from any buildings or windows so as not
to create a further hazard.

Protect the main valve body, pilot
exhaust, and pilot spring case vent
against anything that could clog
them. For safety during shutdown of
backpressure regulators, install vent
valves immediately upstream and
downstream of the main valve.

4. The pilot exhaust may be piped directly into the
main valve outlet (if the exhaust is to be retained,
as in liquid service) or vented to the atmosphere.

In either case, the diameter of the exhaust line or

stack should be as large as practical with a
minimum number of bends or other restrictions.
When installing this unit in relief service, be sure
to consider the jet thrust effect that will occur when
it relieves.

Overpressure Protection

Relief ranges are from 3 to 125 psig (0,21 to 8,6 bar).
The individual spring range of your relief valve is
stamped on the nameplate.

Maximum inlet pressures depend upon body material

and temperature. See the Specications section

for the maximum inlet pressure of the valve. The
valve should be inspected for damage after any
overpressure condition.

Startup

1. With installation completed, slowly open the
upstream shut-off valve while using a gauge to

monitor inlet pressure. On backpressure

applications using an isolating bypass, open the
downstream shut-off valve, and close the
bypass valve.

2. If set pressure adjustment is necessary, adjust a

Type 6358 or 6358B pilot by following the
procedures in the adjustment section.

4

Types 1808 and 1808A

Adjustment

WARNING

!

The allowable spring range is stamped
on the nameplate. If a pressure setting
beyond the indicated range is required,
substitute the appropriate spring. Be
sure to label the valve to indicate the
new pressure range.

Always use a pressure gauge to
monitor pressure when making
adjustments. Remove the closing
cap (key 12, Figure 6) then loosen
the locknut (key 11). To increase the
setting, turn the adjusting screw
(key 10) clockwise. Turn the adjusting
screw counterclockwise to decrease the
setting. Tighten the locknut to maintain
position and install closing cap.

WARNING

!

To avoid personal injury or equipment
damage, never adjust the pilot control
spring to produce a set pressure higher
than the upper limit of the set pressure
range for that particular spring.

Set pressure is dened as the pressure at which the

pilot starts to discharge. Each unit is factory-set for the

set pressure specied on the order. If no set pressure
is specied, the unit is factory-set at approximately the

midrange of the spring.

Maintenance

Parts are subject to normal wear and must be
inspected and replaced as necessary. Frequency of
inspection and maintenance depend upon severity of
service conditions. The main valve body need not be
removed from the line prior to maintenance.

WARNING

!

Avoid personal injury or property
damage from sudden release of
pressure or explosion of accumulated
gas. Before starting disassembly,
isolate the relief valve or backpressure
regulator from line pressure, release
trapped pressure from the body and any
isolated piping, and vent any trapped
loading pressure.

Main Valve

This procedure is performed when inspecting,
cleaning, or replacing any main valve parts. Key
numbers are referenced in Figures 3 and 4.

Note

If the trim is to be inspected and no
further maintenance is required, it is
unnecessary to remove the pilot from the
upper casing (key 1) or separate the upper
casing from the lower casing (key 2).

Disassembly

Shutdown

Relief Installations

Slowly close the upstream shut-off valves. Release
all pressure from the main valve and pilot by opening
a vent valve. When all pressure has been released,

tighten the tting.

Backpressure Installations

Slowly close the upstream shut-off valve while opening
the bypass valve if an isolating bypass is used. Then
close the downstream shut-off valve, and open both
vent valves to release all pressure from the main valve
and pilot.

1. Remove the two hex nuts (key 18) from the cap
screws (key 17) that hold the lower casing (key 2)
to the body (key 8).

2. Lift the lower casing away from the body.

3. With the lower casing positioned so that the valve
plug (key 6) is accessible, remove the hex nut
(key 14).

4. Remove the O-ring retainer (key 7), the valve
plug (key 6), the O-rings (keys 9, 10, and 11), and
the back-up rings (key 19).

5. Inspect the O-rings and back-up rings, and replace

as necessary. Check all parts for wear.

6. If no further maintenance is required, proceed
to steps 5 through 8 of the Assembly section. If

maintenance inside the casings is required,
proceed with the following steps.

5

Types 1808 and 1808A

7. Disconnect the pilot tubing, and unscrew the pilot
from the upper casing (key 1).

8. Remove the cap screws (key 15) and the hex
nuts (key 16) holding the upper casing (key 1) and
the lower casing (key 2) together.

9. Lift off the upper casing, and remove the
spring (key 12).

10. Remove the upper hex nut (key 14) holding the
upper diaphragm plate (key 4), lower diaphragm
plate (key 5), and diaphragm (key 3) together.
Slide the upper and lower diaphragm plates and
the diaphragm off the cap screw (key 13).

Assembly

1. Assemble the upper diaphragm plate (key 4), the
diaphragm (key 3), and the lower diaphragm plate
(key 5) on the cap screw (key 13).

2. Tighten the upper hex nut (key 14) against the
lower diaphragm plate (key 5) with approximately
5 to 7 foot-pounds (6,8 to 9,5 N•m) of torque.

3. Position the diaphragm so that its holes align with
those in the lower casing (key 2).

4. Fit the upper casing (key 1) in place, and install
the cap screws (key 15) and hex nuts (key 16).
Tighten the hex nuts in a crisscross pattern with
approximately 15 foot-pounds (20 N•m) of torque.

5. Install the O-rings (keys 9, 10, and 11) and

back-up rings (key 19) into place on the valve plug
(key 6). Slide the valve plug (key 6) and O-ring
retainer (key 7) over the cap screw (key 13).

6. Tighten the hex nuts (key 14) against the O-ring
retainer with approximately 5 to 7 foot-pounds
(6,8 to 9,5 N•m) of torque.

Types 6358 and 6358B Pilots

This procedure is performed if inspecting or replacing
any pilot parts. Key numbers are shown in Figure 6.

Note

All pilot maintenance may be performed
with the pilot body (key 1) attached
to the pipe nipple unless the body is
removed or the entire pilot replaced as a
unit. If only the control spring (key 7) or
spring seat (key 8) needs to be replaced,
perform only steps 1, 2, and 6 below.

1. Remove the closing cap (key 12), loosen the
locknut (key 11), and turn the adjusting screw
(key 10) counterclockwise to remove the
spring compression.

2. Remove the machine screws (key 17), spring case
(key 2), control spring (key 7), and spring seat
(key 8) from the body.

3. Remove the connector cap and gasket from the
top of the diaphragm assembly (key 5), and then
remove the valve spring (key 14). Unclip the
E-ring (if used) and remove the diaphragm
assembly. Remove the stem guide (key 9) to gain
access to the valve plug (key 4) and the O-ring
(key 37), if used.

4. Make sure the restriction or restriction plug
(key 20), registration hole, and valve plug seating

surfaces are free from debris. Inspect and

replace parts as necessary, making sure that the
restriction or restriction plug and valve plug
(key 4) are installed, and then secure the valve
plug with the stem guide (key 9). With a Type
6358 pilot, coat the restriction plug threads with
a good quality sealant before installation.

Note

Before performing step 7, it is
recommended that the gaskets (key 21)
be replaced.

7. Fit the lower casing into the valve body,
aligning the cap screws (key 17) with the holes
in the body. Tighten the hex nuts (key 18) using
approximately 20 foot-pounds (27 N•m) of torque.

8. Replace the pilot and tubing, if removed.

9. When all maintenance is complete, perform
the Startup procedure if the unit will immediately
be returned to service.

6

5. Install the diaphragm/plate/connector portion of

the diaphragm assembly (key 5), clip the E-ring
(if used) to the grooved end of the valve plug
(key 4), and install the valve plug spring (key 14),
connector cap gasket (key 36), and connector
cap (key 6) into the top of the diaphragm
assembly connector.

6. Install the control spring (key 7), spring seat

(key 8), spring case (key 2), and machine screws

(key 17). After assembly, make sure of the proper
control spring setting according to the Adjustment
section, and remark the nameplate if necessary.

Types 1808 and 1808A

P590 Series Filter

This procedure is to be performed if it is necessary to

clean or replace lter parts in a Type P593-1 or P594-1
lter assembly.

1. Remove the following as shown in Figure 5: lter

body (key 1), machine screw (key 4), spring washer

(key 6), gasket (key 7), two at washers (key 5),
and lter element (key 2).

2. Upon reassembly, one of the at washers must
go between the lter element and lter head
(key 3), and the other must go between the lter

element and gasket.

3. Use pipe thread sealant on the lter head

pipe threads.

Parts Ordering

When corresponding with your local Sales Ofce about

this equipment, always reference the equipment
serial number or FS number that can be found on
the nameplate.

When ordering replacement parts, reference the
11-character key number of each needed part as found
in the following parts list. Separate kits containing all
recommended spare parts are available.

Parts List

Main Valve Types 1808 and 1808A

Key Description Part Number

Parts Kit (includes keys 3, 9, 10, 11, 19, and 21) R1808X00012

1 Upper Casing, Steel 25A7831X012

2 Lower Casing, Steel 25A7828X012

3* Diaphragm Assembly, Nitrile (NBR) 10A0288X012

4 Upper Diaphragm Plate, Zinc-plated steel 15A7834X012

5 Lower Diaphragm Plate, Zinc-plated steel 14A9681X012

6* Valve Plug, Stainless steel 15A7826X012

7 O-Ring Retainer, Steel 15A7827X012

8 Body

Type 1808

Cast iron 25A7830X012

WCC Steel, NACE 25A7926X022

Type 1808A, Cast iron 37A7694X012

9* O-Ring, Nitrile (NBR) 15A8508X012

10* O-Ring, Nitrile (NBR) 1C628006992

11* O-Ring, Nitrile (NBR) 1F358106992

*Recommended spare part

Key Description Part Number

12 Spring, Zinc-plated steel 15A8775X012

13 Cap Screw, Zinc-plated steel 15A7839X012

14 Hex Nut, Steel (2 required) 1V136228982

15 Cap Screw, Zinc-plated steel (12 required) 1E760324052

16 Hex Nut, Zinc-plated steel (12 required) 1A346524122

17 Cap Screw, Zinc-plated steel (2 required)

Type 1808 15A7835X012

Type 1808A 17A9766X012

18 Hex Nut, Zinc-plated steel (2 required) 1E944524112

19* Back-up Ring,

Polytetrauoroethylene (PTFE) (2 required) 1U529406992

20 Valve Plug Guide, Stainless steel 15A7832X012

21* Gasket, Nitrile (NBR) (2 required) 15A7836X012

36 Elbow

Copper Tube - - - - - - - - - - -

Steel Tube - - - - - - - - - - -

Stainless steel - - - - - - - - - - -

36 Pipe Plug, Steel (with upstream registration) - - - - - - - - - - -

Pilot Mounting Parts

Key Description Part Number

21 Filter

Standard, Brass Type P594-1

Corrosive, Aluminum Type P593-1

Corrosive (NACE), Brass Type P593-1

22 Pipe Nipple

Galvanized steel (standard) - - - - - - - - - - -

Zinc-plated steel (NACE) - - - - - - - - - - -

24 Pipe Tee

Malleable iron (standard) - - - - - - - - - - -

316 Stainless steel (NACE) - - - - - - - - - - -

25 Connector Fitting, Without upstream registration

Without Filter

Steel (standard) - - - - - - - - - - -

316 Stainless steel (NACE) - - - - - - - - - - -

26 Elbow Fitting, Without upstream registration

With Filter

Standard - - - - - - - - - - -

316 Stainless steel (NACE) - - - - - - - - - - -

27 Vent Assembly Type Y602-11

28 Tubing,

316 Stainless steel (without upstream registration) - - - - - - - - - - -

29* Gauge, 0 to 160 psig/0 to 11,0 bar/0 to 1,1 MPa 11B8579X042

29 Pipe Plug

Zinc-plated steel (NACE) - - - - - - - - - - -

316 Stainless steel (NACE) - - - - - - - - - - -

7

Types 1808 and 1808A

21

17

18

12 13

47A7696-A

1

15

16

11

20

4

19

10

2

36

3

5

9

6

7

14

8

21

17

18

47A7696-A

Figure 3. Type 1808A Assembly

8

Types 1808 and 1808A

45A7841-D

3

16

21

11

6

12

15

20

D

c A

1

13

4

19

2

36

10

5

17

18

9

14

7

Figure 4. Type 1808 Assembly

8

6

A7008

Figure 5. P590 Series Filter Assembly

7 1 4 3

5 2 5

9

Types 1808 and 1808A

P590 Series

Key Description Part Number

1 Filter Body

Type P594-1, Brass 1E312414012

Type P593-1 (NACE), Aluminum 1E3124X0022

2* Filter Element, Cellulose 1E312606992

3 Filter Head

Type P594-1, Brass 1E312514012

Type P593-1 (NACE), Aluminum 1E3125X0022

4 Machine Screw

Type P594-1, Brass 1J500218992

Type P593-1 (NACE), Aluminum 1J500209012

5 Washer, 2 required

Type P594-1, Brass 1J500018992

Type P593-1, Aluminum 1J500010062

6* Spring Washer, Steel 1H885128982

7* Gasket, Composition 1F826804022

12 Seal Wire,

304 Stainless Steel (for Type P593-1, NACE only) 1U7581X0022

Types 6358 and 6358B Pilots

Key Description Part Number

1 Body

CF8M Stainless steel 39A5972X012

Aluminum 39A0138X012

2 Spring Case

316 Stainless steel 28A9277X012

Aluminum 25A6220X012

3 Body Plug

316 Stainless steel 1B797535072

Aluminum 1B797509032

4* Valve Plug

303 Stainless steel/Nitrile (NBR) (standard) 14B6372X012

UHMWPE 16A2924X012

5* Diaphragm Assembly

Steel / Nitrile (NBR) (standard) 15A6216X072

Steel / Neoprene (CR) 15A6216X212

Steel / Fluorocarbon (FKM) 15A6216X172

Steel / Nitrile (NBR) (for Type 6358B only)

2 to 10 psig (0,14 to 0,69 bar) 15A6216X182

Key Description Part Number

6 Connector Cap

18-8 Stainless steel 16A2921X012

316 Stainless steel 16A2921X022

7 Spring

3 to 18 psig (0,21 to 1,2 bar), Green 1B986027212

15 to 40 psig (1,0 to 2,8 bar), Yellow 1E392527022

35 to 125 psig (2,4 to 8,6 bar), Red 1K748527202

8 Spring Seat, Steel 1B798525062

9 Stem Guide

416 Stainless steel (standard) 16A2923X012

174 Stainless steel 16A2923X022

10 Adjusting Screw, Zinc-plated steel 10B7192X012

11 Locknut, Steel 1A946324122

12 Closing Cap

Plastic 23B9152X012

303 Stainless steel 1H2369X0032

13* Body Plug Gasket, Composition 1C495704022

14 Valve Spring

302 Stainless steel (standard) 1E701337022

Inconel

16 Vent Assembly (2 required) Type Y602-12

17 Machine Screw, (6 required)

Stainless steel 10B6189X022

Steel 1V4360X0022

20 Restriction

Type 6358

Steel 1A346128982

Stainless steel 1V7435X0012

Type 6358B

High-Gain, Yellow

Steel 17A7279X012

Stainless steel 17A7279X032

20* Restriction

Type 6358B

Medium-Gain, Steel, Red 17A2029X012

Low-Gain, Steel, Blue 17A7277X012

36* Gasket, Fluorocarbon (FKM), (2 required) 1U1716X0012

37* O-ring

Nitrile (NBR) 16A2920X012

Fluorocarbon (FKM) 16A2920X022

®

19A8179X012

*Recommended spare part.

Inconel® is a marked owned by Special Metals Corporation

10

12

10

19

8

6

5

Types 1808 and 1808A

11

2

7

36

16

A6920

10

19

8

6

5

14

14

20

4

9

1

37

13

3

TYPE 6358 PILOT INTERIOR VIEW

12

11

2

7

36

9

37

3

B2619-2

Figure 6. Types 6358 and 6358B Pilot Assemblies

16

20

4

1

13

TYPE 6358B PILOT INTERIOR VIEW

11

Types 1808 and 1808A

Industrial Regulators

Emerson Process Management
Regulator Technologies, Inc.

USA - Headquarters
McKinney, Texas 75069-1872 USA
Tel: [phone]
Outside U.S. 1-972-548-3574

Asia-Pacic

Shanghai, China 201206
Tel: [phone]

Europe
Bologna, Italy 40013
Tel: [phone]

Middle East and Africa
Dubai, United Arab Emirates
Tel: [phone]

For further information visit www.sherregulators.com

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Natural Gas Technologies

Emerson Process Management
Regulator Technologies, Inc.

USA - Headquarters
McKinney, Texas 75069-1872 USA
Tel: [phone]
Outside U.S. 1-972-548-3574

Asia-Pacic

Singapore, Singapore 128461
Tel: [phone]

Europe
Bologna, Italy 40013
Tel: [phone]
Gallardon, France 28320
Tel: [phone]

TESCOM

Emerson Process Management
Tescom Corporation

USA - Headquarters
Elk River, Minnesota 55330-2445 USA
Tel: [phone]

Europe
Selmsdorf, Germany 23923
Tel: [phone]

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