Emerson Fisher POSI-SEAL A41 Instruction Manual

Instruction Manual

D500211X012

A41 Valve

November 2012

Fisherr A41 High Performance Butterfly Valve

Contents

Introduction 1...................................

Scope of Manual 1............................

Description 1................................

Specifications 2..............................

Educational Services 2.........................

Installation 5

Valve Orientation 6...........................

Maintenance 9

Packing Maintenance 12.......................

Seal Ring Maintenance for NPS 3 through 12 13....

Seal Ring Maintenance for NPS 2 19..............

Disc, Drive Shaft and Bearing Maintenance for

NPS 3 through 12 20........................

Disc, Drive Shaft and Bearing Maintenance for

NPS 2 24..................................

Actuator Mounting 26.........................

Parts Ordering 27

Retrofit Kits for ENVIRO-SEALt Packing 27........

Repair Kits for ENVIRO-SEAL Packing 28...........

Parts List 28...................................

....................................

..................................

................................

Introduction

Figure 1. Fisher A41 Valve

W9269

Scope of Manual

This instruction manual includes installation, maintenance, and parts information for Fisher A41 high performance
butterfly valves (figure 1). Refer to separate instruction manuals for information covering the power on-off actuator
and accessories.

Do not install, operate, or maintain A41 valves without being fully trained and qualified in valve, actuator, and
accessory installation, operation, and maintenance. To avoid personal injury or property damage, it is important to
carefully read, understand, and follow all the contents of this manual, including all safety cautions and warnings. If you
have any questions about these instructions, contact your Emerson Process Management sales office before
proceeding.

Description

The A41 high performance butterfly valves have eccentrically mounted discs to reduce wear and reduce torque
requirements. The valve includes filled-PTFE or graphite packing rings that electrically bond the shaft to the valve
body. This valve has a Double D drive shaft end, and soft or metal seal rings for use in a wide variety of applications.

www.Fisher.com

A41 Valve

November 2012

Table 1. Specifications

Instruction Manual

D500211X012

Valve Sizes and End Connection Styles

NPS J 2,

J 3, J 4, J 6, J 8, J 10, and J 12 valves

Flow Characteristic

Approximately linear

in wafer or single flanged style (NPS 2 available in
wafer style only)

Flow Direction

Seefigure4

Maximum Inlet Pressures

Carbon Steel, Stainless Steel, and CN7M Valves:
Consistent with CL150 and 300 pressure-temperature
ratings per ASME B16.34, unless limited by material

(1)

Disc Rotation

Clockwise to close (when viewing the drive shaft end)

through 90 degrees of disc rotation (see figure 7)
temperature capabilities. NPS 2 is also consistent with
CL600

Maximum Pressure Drops

(1)

Consistent with CL150 and 300 pressure/
temperature ratings per ASME B16.34 except for
PTFE, UHMWPE, and Phoenix III seals that are derated
at some higher pressure/temperatures values. (See
figure 2)

Valve Classification

Face-to-face dimensions of NPS 3 through 12 in

CL150 or 300, and meets API 609 or MSS-SP68

standards for face-to-face dimensions of wafer-style

and single-flange valves

Actuator/Valve Action

With the diaphragm or piston actuators, the valve

action is field-reversible. Refer to information in the

Shutoff Classifications

J PTFE, Reinforced PTFE, and UHMWPE

(2)

Seal: No
visible leakage for this bidirectional seal per MSS
SP-61

J NPS 2 Metal Seal: Bidirectional shutoff. 0.001% of

maximum valve capacity (1/10) of Class IV per
ANSI/FCI 70-2 and IEC 60534-4. Pressure Drop is 740
psigforwardand100psigreverse

J NOVEX Seal: Unidirectional shutoff is MSS SP-61 in

the preferred flow direction

J Phoenix III Seal: No visible leakage for this

bidirectionalsealperMSSSP-61.ForoptionalPhoenix
III Fire-Tested seal, consult your Emerson Process
Management sales office

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

2. UHMWPE stands for ultra high molecular weight polyethylene.

Installation section and in figures 6 and 7.

Shaft Diameters

See table 2

Approximate Weights

See table 2

ENVIRO-SEAL Packing

This optional PTFE or graphite packing system
provides excellent sealing, guiding, and transmission
of loading force to control liquid and gas emissions
(see figure 6). See Bulletin 59.3:041 ENVIRO-SEAL
Packing System for Rotary Valves for more
information

Educational Services

For information on available courses for the Fisher A41 high performance butterfly valve, as well as a variety of other
products, contact:

Emerson Process Management
Educational Services, Registration
P.O. Box 190; 301 S. 1
Marshalltown, IA 50158-2823
Phone: [phone] or
Phone: [phone]
FAX: [phone]
e-mail: [e-mail]

2

st

Ave.

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D500211X012

Table 2. Valve Size, Shaft Diameter, and Approximate Weight

VALVE SIZE,

NPS

2 150/300/600 12.7 1/2 4.3 9.5 --- ---

3

4

6

8

10

12

PRESSURE

CLASS

150 12.7 1/2 4.5 10 6.4 14
300 15.9 5/8 5.9 13 11 25
150 15.9 5/8 8.6 19 11 24
300 19.1 3/4 10 23 18 39
150 19.1 3/4 13 29 16 35
300 25.4 1 15 33 27 59
150 25.4 1 21 47 27 59
300 31.8 1-1/4 24 53 42 93
150 31.8 1-1/4 34 75 40 88
300 38.1 1-1/2 44 96 78 172
150 38.1 1-1/2 49 107 62 137

300 44.5 1-3/4 64 141 131 288

SHAFT DIAMETER

mm Inches kg Pounds kg Pounds

Wafer-Style Single-Flange

APPROXIMATE WEIGHT

A41 Valve

November 2012

Table 3. Maximum Allowable Inlet Pressure for M35-1 and CW2M Valve Bodies

TEMPERATURE M35-1 CW2M

_C Bar

-46 to 38
93

149
204
260

TEMPERATURE CL150 CL300 CL600

_F Psig

-50 to 100
200
300
400
500

1. M35-1 and CW2M valvematerial are not included in ASME B16.34 pressure/ temperatureratings. The designations 150and 300 for this valve material areusedonlytoindicaterelativepres
sure/retaining capabilities and are not ASME pressure/ temperature rated classes.

2. CL600 is only availablein NPS 2.

15.8

13.8

13.1

12.7

11.7

230
200
190
185
170

41.3

36.5

34.1

33.1

32.8

600
530
495
480
475

82.7

72.7

68.2

65.8

65.5

(2)

1200
1055

990
955
950

(1)

20.0

17.9

15.9

13.8

11.7

CL150 CL300 CL600

290
260
230
200
170

51.7

51.7

50.3

48.6

45.9

750
750
730
705
665

103.4

103.4

100.3

97.2

91.7

1,500
1,500
1,455
1,410
1,330

(2)

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A41 Valve

November 2012

Figure 2. Maximum Pressure/Temperature Ratings

OPERATING TEMPERATURE, _C

PHOENIX III SEAL
WITH PTFE INSERT

PTFE AND REINFORCED
PTFE SEAL

UHMWPE
SEAL

DIFFERENTIAL PRESSURE, PSI

OPERATING TEMPERATURE, _F

NOTE:

1

LIMITATIONS IMPOSED BY THE BACKUP RING USED WITH THISSEAL.
TO DETERMINE THE EFFECTIVE TEMPERATURELIMITATION OF THE
APPROPRIATE SEAL/BACKUP RING COMBINATION, REFER TO TABLE 4.

A6306-2

TEMPERATURE LIMITATIONS DO NOT ACCOUNT FOR THE ADDITIONAL

Instruction Manual

D500211X012

Table 4. Construction Material Temperature Limits

COMPONENTS AND MATERIALS OF CONSTRUCTION

Valve Body Material

Carbon Steel

CF8M

CG8M

Disc Material

S31600

CG8M

Shaft Material

S20910
S17400

Bearing Material

PEEK / PTFE lined

Metal

Packing Material

PTFE V-rings

Graphite rings

Seal Ring

PTFE (Standard) -46 to 232 -50 to 450

Reinforced PTFESoft Seal Ring -46 to 232 -50 to 450

UHMWPE Soft Seal Ring -18 to 93 0to200

NOVEX MetalSealRing -46 to 538 -50 to 1000

NPS2MetalSealring -46 to 538 -50 to1000

Phoenix III MetalSealRing

Fluorocarbon backup ring -40 to 232 -40 to 450

Phoenix III Fire-Tested

Fluorocarbon backup ring

(Specify metal bearings and graphite packing)

1. For component selection and applicable fire-tested standards and codes, consult your Emerson Process Managementsales office.

(1)

MetalSealRing

TEMPERATURE LIMITS

_C _F

-29 to 427

-198 to538

-198 to538

-198 to538

-198 to538

-198 to538

-62 to 427

-73 to 260

-198 to538

-46 to 232

-198 to438

(1) (1)

-20 to 800

-325 to1000

-325 to1000

-325 to1000

-325 to1000

-325 to1000

-80 to 800

-100 to500

-325 to1000

-50 to 450

-325 to1000

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Instruction Manual

D500211X012

A41 Valve

November 2012

Hex Head Cap Screw and Stud Bolt Data

WAFER STYLE SINGLE FLANGESTYLE

VALVE

SIZE,

NPS

(2)

2

3 4 5/8-11 5.75 8 3/4-10 6.5 8 5/8-11 1.875 16 3/4-10 2

4 8 5/8-11 6 8 3/4-10 7 16 5/8-11 2 16 3/4-10 2.25

6 8 3/4-10 6.5 12 3/4-10 7.5 16 3/4-10 2 24 3/4-10 2.5

8 8 3/4-10 7 12 7/8-9 9 16 3/4-10 2.25 24 7/8-9 3

10 12 7/8-9 8 16 1-8 10 24 7/8-9 2.5 32 1-8 3.5

12 12 7/8-9 8.5 16 1-1/8-8 11 24 7/8-9 2.75 32 1-1/8-8 3.75

1. Thread engagement in accordance with ASME B31.3.

2. The NPS 2 valve is only available in wafer style and is multiratedto CL150, 300 and 600.The CL600 stud boltsrequire 8 bolts, have a dia. of 5/8-11, and are6 inches long.

No. of

Stud

Bolts

4 5/8-11 5 8 5/8-11 5.25 --- --- --- --- --- ---

CL150 CL300 CL150 CL300

Size Dia

Inch &

Thread

A

Dimen-

sion,

Inch

(1)

No. of

Stud

Bolts

Size Dia

Inch &

Thread

A

Dimen-

sion,

Inch

No. of

Cap

Screws

Size Dia

Inch &

Thread

B

Dimen-

sion,

Inch

No. of

Cap

Screws

Size Dia

Inch &

Thread

Figure 3. Cap Screws and Stud Bolts for Installation

A3887

A

A3886

STUD BOLT CAP SCREW

B

B

Dimen-

sion,

Inch

Installation

The valve is normally shipped as part of a valve assembly, with the actuator, handlever, or handwheel mounted on the
valve. If the valve or actuator have been purchased separately, or if the actuator has been removed for maintenance,
mount the actuator on the valve, and adjust actuator travel before inserting the valve body into the line. This is
necessary due to the measurements that must be made during the actuator calibration adjustment process. Refer to
the Actuator Mounting section of this manual and to the separate actuator or handlever instruction manual for
mounting and adjustments before proceeding.

WARNING

Always wear protective gloves, clothing and eyewear when performing any installation or maintenance operations to
avoid personal injury.

To avoid personal injury or property damage resulting from the sudden release of pressure, do not install the valve
assembly where service conditions could exceed the limits giveninthismanual,thelimitsontheappropriatenameplates,
or the matching pipe flange rating. Use pressure-relieving devices as required by government or accepted industry codes
andgoodengineeringpractices.

Check with your process or safety engineer for any additional measures that must be taken to protect against process
media.

If installing into an existing application, also refer to the WARNING at the beginning of the Maintenance section in this
instruction manual.

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A41 Valve

November 2012

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D500211X012

CAUTION

The valve configuration and construction materials were selected to meet particular pressure, temperature, pressure drop,
and controlled fluid conditions specified in the customer's order. Because some body/trim material combinations are
limited in their pressure drop and temperature range capabilities (especially due to differences in thermal expansion rates),
do not apply any other conditions to the valve without first contacting your Emerson Process Management sales office.

1. Install a three-valve bypass around the control valve assembly if continuous operation is necessary during
inspection and maintenance of the valve.

2. Inspect the valve to be certain that it is free of foreign material.

3. Be certain that adjacent pipelines are free of any foreign material, such as pipe scale or welding slag, that could
damage the valve sealing surfaces.

CAUTION

Damage to the disc will occur if any pipe flanges or piping connected to the valve interfere with the disc rotation path. If the
piping flange has a smaller inner diameter than specified for schedule 80 piping, measure carefully to be certain the disc
rotates without interference before putting the valve into operation.

Valve Orientation

When installing the valve, it is highly recommended that the valve drive shaft be horizontal as shown in figure 4.

Valve Direction

The high performance butterfly valve is designed to allow flow in either direction when in the open position. When in
the closed position, high pressure should be applied to a specific side of the disc to provide best performance and
optimal valve life (see list of seal types below). See figure 4.

Table 5. Special Spiral Wound Gasket Dimensions, Inches

Valve Size, NPS Class Gasket Internal Diameter Gasket Outside Diameter

3 150 4.25 5.00 5.375

3 300 4.25 5.00 5.875

4 150 5.25 6.125 6.875

4 300 5.25 6.125 7.125

1. Dimension per API 601 and ASME B16.5 Flanges.

Applications with bi-directional seals, such as soft or Phoenix III, under normal operating conditions can (at different
times) experience pressure in both directions; the highest of the two pressures should be exerted on the preferred side
of the disc. If the two pressures are equal, then the one lasting the longest period of time should be applied to the
preferred side.

1. For PTFE, reinforced PTFE, or UHMWPE seal rings: This seal is bidirectional. For best performance, high pressure
should be applied to the front (retaining ring) side of the disc.

2. For metal seal rings:

Centering Outside

Diameter

(1)

a. NOVEX seal: The NOVEX seal is uni-directional. High pressure at the closed position MUST be at the back

(waterway side) of the disc.

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D500211X012

A41 Valve

November 2012

b. Phoenix III Seal: This seal is bidirectional. For best performance, high pressure at the closed position should be

applied to the back (waterway side) of the disc.

c. NPS 2 Seal: The preferred direction of installation is with high pressure at the front (retaining ring side) of the

disc. Reverse shutoff is permissible at lower pressure (see spec ifications table).

Installing the Valve in the Pipeline

WARNING

The edges of a rotating disc have a shearing effect that may result in personal injury. To help prevent such injury, stay clear
of the disc edges when rotating the disc (figure 4).

CAUTION

Damage to the disc (key 3, figure 12) sealing surfaces may occur if the disc is not closed when the valve is being installed or
removed from the pipeline. If necessary, provide a loading pressure to the actuator temporarily to retain the disc in the
closed position while installing or removing the valve from the pipeline.

1. For Fail-Open Actuators: It will be necessary to provide a temporary loading pressure to the actuator diaphragm to
move the valve disc to the closedposition.ObservetheaboveWarning when closing the valve. If a loading pressure
is required, use caution when working with the valve. If the loading pressure is disconnected, the disc will open
rapidly.

2. With the disc in the closed position, install line flange gaskets, and insert the valve between the pipeline flanges.

WARNING

If spiral wound gaskets are to be used with an NPS 3 or 4 CL150 or 300 single flange valve, special spiral wound gaskets
conforming to the dimensions listed in table 5 MUST be used. Improperly sized gaskets may increase the likelihood of 1)
excessive seat leakage, 2) damage due to contact with valve internals, and 3) external leakage; which may result in
personal injury due to a sudden increase or decrease of pressure within
special dimension spiral wound gaskets can be obtained from your local spiral wound gasket vendor.

The remaining single flange valve sizes (NPS 6 through 12) and all wafer style valves (NPS 2 through 12) use the standard
size spiral wound gaskets. Only the single flange valves in the sizes and pressures listed in the table above require special
spiral wound gaskets.

Select the appropriate gaskets for the application. Flat sheet, spiral wound (NPS 6 through 12), or other gasket types
made to ASME 16.5 group or a user's standards can be used for A41 valves depending on the service conditions and
applications.

3. Install the flange studs:

-- or release of pressure from -- the pipeline. The

Note

Lubricate line flange studs or bolts before inserting into flanges. If necessary, provide additional support for the control valve
assembly because of its combined weight.

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A41 Valve

November 2012

Instruction Manual

D500211X012

D Flange Studs: Install two or more line flange studs into the line flanges to help hold the valve in position while

centering the valve. Carefully center the valveontheflangestoensurediscclearance.

D Select and install two pipeline gaskets.

D Flange Cap Screws: If line flange cap screws are used, be certain the cap screw threads engage the tapped holes to a

depth equal to the flange cap screw diameter.

4. Install the remaining line flange bolts to secure the valve in the pipeline. Tighten the bolts in a crisscross pattern to
ensure proper alignment of the valve with the flanges.

Packing Adjustment and Shaft Bonding

WARNING

Personal injury could result from packing leakage. Valve packing was tightened before shipment; however, the packing
might require some readjustment to meet specific service conditions.

CAUTION

Excessive tightening of packing will accelerate wear and could produce higher rotating friction loads on the valve stem.

1. For PTFE or graphite packing: Tighten standard packing follower nuts only enough to prevent shaft leakage.
Excessive tightening of packing will accelerate wear and could produce higher rotating friction loads on the valve
stem. If necessary, refer to the Packing Maintenance section.

2. ENVIRO-SEAL Packing Systems will not require this initial re-adjustment. Refer to the separate ENVIRO-SEAL Packing
System for Rotary Valves Instruction Manual (D101643X012) for repair and adjustment procedures.

3. For hazardous atmosphere or oxygen service valves, read the following Warning, and provide the bonding strap
assembly mentioned below if the valve is used in an explosive or hazardous atmosphere.

WARNING

The valve drive shaft is not necessarily grounded to the pipeline when installed. If the process fluid or the atmosphere
around the valve is flammable, personal injury or property damage could result from an explosion caused by a discharge of
static electricity from the valve components.

Standard PTFE packing is composed of a partially conductive carbon-filled PTFE female adaptor with PTFE V-ring packing.
Standard graphite packing is composed of all conductive graphite ribbon packing rings. Alternate shaft-to-valve body
bonding is available for hazardous service areas where you feel the the standard packing is not sufficient to bond the shaft
to the valve (see the following steps).

For oxygen service applications it is necessary to provide alternate shaft-to-valve body bonding (see the following steps).

4. Attach the bonding strap assembly (key 131, figure 5) to the shaft with the clamp (key 130, figure 5).

5. Connect the other end of the bonding strap assembly to the valve flange cap screws.

6. For more information, refer to the Packing Maintenance section below.

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D500211X012

Figure 4. Flow Direction

RETAINER RING SIDE

A41 Valve

November 2012

RETAINER RING SIDE

MFG LABEL

FLOW ARROW

ARROW SHOWS PREFERRED FLOW DIRECTION FOR SOFT SEALS AND NPS 2 METAL SEAL

FORWARD FLOW

MFG LABEL

FLOW ARROW

ARROW SHOWS FLOW DIRECTION FOR NOVEX METAL SEAL, AND PREFERRED
FLOW DIRECTION FOR PHOENIX METAL SEAL

REVERSE FLOW

REVERSE
FLOW

FORWARD
FLOW

NOTES:

1. BY EMERSON PROCESS MANAGEMENT DEFINITION:

D FORWARD FLOW IS INTO THE FACESIDE OF THE DISC.
D REVERSE FLOW IS INTO THE HUB SIDE OF THE DISC.

75B1181-A
A6881-2

FACE SIDE OF DISC

Maintenance

Valve parts are subject to normal wear and must be inspected and replaced as necessary. The frequency of inspection
and replacement depends upon the severity of service conditions. Instructions are given in this section for replacing
packing, seal ring, disc, shaft, bearings, and other valve parts. Also, instructions are provided for changing valve action,
mounting, and adjusting the actuator. Refer to the actuator instruction manual for additional information for
mounting and adjusting the actuator.

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A41 Valve

November 2012

Instruction Manual

D500211X012

CAUTION

It is possible to damage the valve if the actuator travel stops are not properly adjusted before stroking the valve.

WARNING

Avoid personal injury or property damage from sudden release of process pressure or bursting of parts. Before performing
any maintenance operations:

D Do not remove the actuator from the valve while the valve is still pressurized.

D Always wear protective gloves, clothing, and eyewear when performing any maintenance operations to avoid personal

injury.

D Disconnect any operating lines providing air pressure, electric power, or a control signal to the actuator. Be sure the

actuator cannot suddenly open or close the valve.

D Use bypass valves or completely shut off the process to isolate the valve from process pressure. Relieve process pressure

from both sides of the valve. Drain the process media from both sides of the valve.

D Vent the pneumatic actuator loading pressure and relieve any actuator spring precompression.

D Use lock-out procedures to be sure that the above measures stay in effect while you work on the equipment.

D The valve packing box may contain process fluids that are pressurized, even when the valve has been removed from the

pipeline. Process fluids may spray out under pressure when removing the packing hardware or packing rings, or when
loosening the packing box pipe.

D Check with your process or safety engineer for any additional measures that must be taken to protect against process

media.

WARNING

The edges of a rotating disc have a shearing effect that may result in personal injury. To help prevent such injury, stay clear
of the disc edges when rotating the disc (key 3).

CAUTION

During the following steps, do not rotate the disc past 90 degrees in the open direction. Rotating the disc past 90 degrees
can damage the seal ring.

Use caution when tightening the packing flange nuts. Overtightened nuts can damage packing box parts.

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Instruction Manual

D500211X012

Figure 5. Optional Shaft-to-Valve Body Bonding Strap Assembly

VALVE BODY

ACTUATOR

A

A41 Valve

November 2012

37A6528-A
A3143-2

VIEW A-A

A

Stopping Leakage

For PTFE-filled or graphite standard packing arrangements covered in this manual, often leakage from the packing can
be stopped by tightening the packing flange nuts just enough to stop the leak. Use caution when tightening the nuts,
overtightened nuts can damage packing box parts.

D If tightening the packing flange nuts does not stop the leakage, use the following procedures to remove the control

valve assembly from the pipeline, remove the actuator, and to remove and replace the packing parts.

D If the leakage comes from the outside diameter of the packing box, it is possible that the leakage is caused by

scratches on the packing box wall. Carefully inspect the packing box bore and valve drive shaft when the packing is
removed. Use the following steps to remove the actuator, and to remove and replace the packing parts.

Removing the Actuator

WARNING

Refer to the WARNING at the beginning of the Maintenance section in this instruction manual.

1. Isolatethecontrolvalvefromthelinepressure,releasepressure from both sides of the valve body, and drain the
process media from both sides of the valve. If using a power actuator, also shut off all pressure lines to the power
actuator,andreleaseallpressurefromtheactuator.Uselock-outprocedurestobesurethattheabovemeasures
stayineffectwhileyouworkontheequipment.

WARNING

The edges of a rotating disc have a shearing effect that may result in personal injury. To help prevent such injury, stay clear
of the disc edges when rotating the disc (figure 4).

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A41 Valve

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D500211X012

CAUTION

Damage to the disc (key 3) sealing surfaces may occur if the disc is not closed when the valve is being removed from the
pipeline. For fail open actuators, it may be necessary to apply loading pressure to the actuator to retain the disc in the
closed position while removing the valve from the pipeline.

2. Be sure the disc is in the closed position before attempting to remove the valve from the pipeline or flanges.

For Fail-Open Actuators: It will be necessary to provide a temporary loading pressure to the actuator to move the valve
disc to the closed position. Observe the above Warning when closing the valve. If a loading pressure is required, use
caution when working with the valve. If the loading pressure is disconnected, the disc will open rapidly.

3. With the disc in the closed position, remove line bolting. Remove the valve assembly from the pipeline, and place
the actuator/valve assembly on a flat working surface.

4. Ifagroundingstrapisused(seefigure5),removethehexnuttoreleasetheendofthestrap.Removetheclamp
(key 130) and strap (key 131).

5. Note the orientation of the actuator with respect to the valve body. Also, remove the actuator cover to note the
orientation of the actuator with respect to the valve drive shaft (see figure 7).

When re-assembling the valve assembly, you will need to correctly position the mark on the end of the valve drive
shaft and the valve body, with respect to the actuator drive shaft. Refer to the Actuator Mounting section and figure 7
for the location of the mark on the actuator end of the valve drive shaft. Additional information is provided in the
actuator manual to assist with disassembly, re-assembly, and travel adjustments.

6. Remove the actuator mounting screws (key 14).

7. Remove the actuator from the valve, and remove the valve/actuator coupling.

Packing Maintenance

WARNING

Refer to the WARNING at the beginning of the Maintenance section in this instruction manual.

Standard graphite packing is composed of all conductive packing rings. PTFE-filled packing has a partially conductive
packing ring (such as a carbon-filled PTFE female adaptor) to electrically bond the shaft to the valve body.

If the valve is equipped with the optional ENVIRO-SEAL Packing System, refer to the separate ENVIRO-SEAL Packing
System for Rotary Valves Instruction Manual (D101643X012) for packing maintenance procedures.

When replacing the packing, it is recommended that you remove the control valve assembly from the pipeline.
Valve/actuator travel adjustments must be made with the valve out of the pipeline.

Disassembly

Part locations and key numbers are shown in figures 5 and 11.

1. Remove the packing flange nuts (key 101) and the packing flange (key 114).

2. Remove the old packing rings, using a formed hook.

CAUTION

Carefully use the hook. Avoid scratching the drive shaft or packing box wall. Scratches on valve surfaces can cause leakage.
[Note: the packing box ring (key 107) can remain in place when replacing the packing only.]

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Instruction Manual

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Clean all accessible metal parts and surfaces to remove particles that would prevent the packing from sealing.

A41 Valve

November 2012

Assembly

Inspect the shaft. If it is damaged, it cannot make a good seal with the packing and it must be replaced. If the leakage
comes from the outside diameter of the packing, it is possible that the leakage is caused by nicks or scratches around
the packing box wall. Inspect the packing box wall for nicks and scratches when performing the following procedures.

If the valve is equipped with the ENVIRO-SEAL packing system, refer to the separate ENVIRO-SEAL Packing System for
Rotary Valves Instruction Manual (D101643X012) for assembly.

Note

Except with oxygen service, lightly lubricate new PTFE V-rings with silicone-base lubricant to aid in assembly.

WARNING

Do not lubricate parts when used in oxygen service, or where the lubrication is incompatible with the process media. Any
use of lubricant can lead to the sudden explosion of media due to the oil/oxygen mixture, causing personal injury or
property damage.

1. Install the new packing parts (see figure 6). Install the packing follower and finger tighten the packing flange nuts
onto the studs only enough to stop leakage.

2. If the valve was equipped with a bonding strap assembly (figure 5), re-install the assembly.

3. Refer to the Actuator Mounting section of this manual. If necessary, refer to the separate actuator instruction
manual for adjustment procedures.

4. When the valve is being placed into operation, check around the packing follower for leakage.

For PTFE-filled or graphite standard packing arrangements covered in this manual, often leakage from the packing can
be stopped by tightening the packing flange nuts just enough to stop the leak.

CAUTION

Use caution when tightening the nuts, overtightening nuts can damage packing box parts and result in increased drive
shaft friction.

Seal Ring Maintenance for NPS 3 through 12

Perform this procedure if the control valve is not shutting off properly (that is, if it is leaking downstream). It is
recommended, but not required, to remove the actuator for easier handling of the valve during the following
procedures.

Key numbers are shown in figure 12 unless otherwise noted.

13

A41 Valve

November 2012

Figure 6. Typical Packing Arrangements

PTFE V-RING PACKING

PACKING
FLANGE
(KEY 102)

REDUNDANT SHAFT
RETENTION

PACKING FOLLOWER
(KEY 102)

PACKING SET
(KEY 105)

PACKING RING
(KEY 105)

PACKING BOX RING
(KEY 107)

STANDARD PACKING

Instruction Manual

D500211X012

1

GRAPHITE RIBBON PACKING

PACKING FLANGE NUT
(KEY 101)

LUBRICANT
(KEY 113)

SPRING PACK ASSEMBLY
(KEY 103)

ANTI-EXTRUSION RING
(KEY 106)

PACKING SET
(KEY 105)

PACKING
FLANGE
(KEY 102)

REDUNDANT SHAFT
RETENTION

SPRING PACK
ASSEMBLY
(KEY 103)

11B5895-A
10B6817-A
B2435
C0785-2

NOTE:

INCLUDES ZINC WASHERS

1

FOR GRAPHITE RIBBON PACKING ONLY

PACKING SET
(KEY 105)

SPRING COMPRESSED
PACKING FLANGE STUD

(KEY 100)

SHAFT STEP

VALVEBODY(KEY1)

PACKING BOX RING
(KEY 107)

ENVIRO-SEAL PTFE PACKING SYSTEM

PACKING FLANGE
NUT
(KEY 101)

LUBRICANT
(KEY 113)

SPRING COMPRESSED

PACKING FLANGE
STUD (KEY 100)

SHAFT STEP

VALVE BODY (KEY 1)
PACKING BOX
RING (KEY 107)

ENVIRO-SEAL GRAPHITE PACKING SYSTEM

14

Instruction Manual

D500211X012

Figure 7. Disc Rotation Indication

DISC STOP
INDICATES

APPROXIMATE

TO OPEN

DISC POSITION

INDICATES
APPROXIMATE
DISC
POSITION

A41 Valve

November 2012

CAUTION: DO
NOT ROTATE
DISC INTO
THIS SECTOR

ROTATE DISC
IN DIRECTION
SHOWN ONLY

ACTUATOR END
OF SHAFT

2

RETAINER RING
(KEY 2)

DISC IN THE

CLOSED POSITION

Note:

SET ACTUATOR TRAVEL STOPS TO OBTAIN AN

EQUAL DISTANCE T DISC SURFACE AS SHOWN.

2

LOCATION OF C MARKINGS FORNPS 2 ONLY.

A6358

DISC ROTATION INDICATION FOR NPS 2 THROUGH 12

2

Figure 8. Removing the Retainer Ring

FLAT END
PUNCH

DISC IN THE

OPEN POSITION

ROTATE DISC IN
DIRECTION
SHOWN ONLY

A2879-2

DISC ROTATION INDICATION FOR NPS 2

ROTATE DISC IN
EITHER DIRECTION

KNOCK-OUT FLAT

A6359

CAUTION

During any of the following steps, do not rotate the disc past 90 degrees in the open direction. Rotating the disc past 90
degrees can damage the seal ring.

Disassembly

Refer to removing the actuator steps in the Packing Maintenance section. Most maintenance procedures will require
the actuator to be removed.

15

A41 Valve

November 2012

Instruction Manual

D500211X012

1. Removing the retainer ring (key 2):

For valves with press-fit retainer rings:

D Place the valve on blocks with the seal retainer facing down. (Note: Position blocks so they do not restrict the

retainer ring removal.)

D Rotate the disc to the open position as shown in figure 7.

D On the seal ring side of the retainer ring, locate one of the knock-out points machined on the retainer ring. Using a

hammerandflatendpunchontheknock-outpoint,pop-outtheretainerringfromthevalvebody(seefigure8).

CAUTION

When popping out the retainer ring, be very careful to hit only the knock-out points. Hitting anywhere else can cause
non-repairable damage to the t-slot area.

D For valves with PTFE seal rings, remove the spring (key 5) as it may be necessary to re-install the spring into the new

PTFE seal ring.

D Cleanallsealingsurfacesandpartsbefore re-assembly. Proceed to step 3 below.

For valves with screwed retainer rings:

D Place the valve on blocks with the seal retainer facing up.

D Remove the retainer ring screws (key 23). If necessary, use two of the retainer screws, in the tapped holes in the

retainer ring (key 2) to jack the retainer ring loose from the valve body surface.

2. Remove the seal ring from the valve body seal ring slot.

D For valves with PTFE seal rings, remove the spring (key 5) as it may be necessary to re-install the spring into the new

PTFE seal ring.

D For valves with metal seals, remove the gasket (key 16) from the valve body surface, and discard it as replacement is

recommended.

3. If it is necessary to replace the disc, drive shaft, and the bearings, refer to the Disc, Drive Shaft, and Bearing
Maintenance section before proceeding with the assembly procedures for the seal ring and retainer. The seal ring
could be damaged if it is in place while removing the disc.

CAUTION

Follow instructions in this manual to avoid damage to the seal ring while either removing or installing the disc.

Assembly

Place the valve on blocks with the seal retainer facing up. If the replacement disc, shaft, and bearings have not been
installed in the valve body, go to the Assembly procedures to install them. Do not
being in place. The seal ring could be damaged while installing the disc.

16

install the seal ring without the disc

Instruction Manual

D500211X012

A41 Valve

November 2012

WARNING

Do not lubricate parts when used in oxygen service, or where the lubrication is incompatible with the process media. Any
use of lubricant can lead to the sudden explosion of media due to the oil/oxygen mixture, causing personal injury or
property damage.

CAUTION

Do not rotate the disc past 90 degrees in the open direction. Rotating the disc past 90 degrees can damage the seal ring or
other component parts.

Note

PTFE, NOVEX, and Phoenix Ill seal rings used in other valve types are not interchangeable with seal rings used in the A41 valve. The
A41 seal rings are not interchangeable with seal rings in any other valve type. To order seal rings for this valve, provide the serial
number on the valve.

1. Installing PTFE seal rings:

a. The valve disc should be open while installing the seal ring. If not, rotate the disc to the open position as shown in

figure 7.

b. Hookthespringendstogether,insertthespring(seefigure9)intothegrooveinthesealring,andworkthe

spring into the recess in the PTFE seal ring.

c. Install the seal ring (key 4) assembly into the slot in the valve body as shown in figure 9. Refer to installing the

retainer ring steps below.

2. Installing metal seals:

Note

For metal seals only, it may be necessary to apply dry film lubricant or equivalent moly disulfide to the sealing surfaces of the disc,
seal, and the seal retainer groove. Prior to applying the lubricant, the sealing surfaces should be inspected for injurious defects.
Surfaces can be polished using a scouring pad or equivalent. The edge of the seal that contacts the retaining ring groove should
also be inspected and polished if necessary.

a. Rotate the disc to the open position as shown in figure 7. The seal ring will be damaged if the disc remains in the

closed position during seal and retainer ring assembly.

WARNING

Do not lubricate parts when used in oxygen service, or where the lubrication is incompatible with the process media. Any
use of lubricant can lead to the sudden explosion of media due to the oil/oxygen mixture, causing personal injury or
property damage.

b. Installthemetalsealringassembly(seefigure9).

17

A41 Valve

November 2012

Instruction Manual

D500211X012

Figure 9. Available Seal Configuration

RETAINING
RING

PRESSURE-ASSISTED
SEAL

HIGH PRESSURE
SHUTOFF

DISC
FACE

B1558-3

GRAPHITE
GASKET
(KEY 16)

RETAINING
RING
(KEY 2)

A6360-1

NPS 2 METAL SEAL

UNIDIRECTIONAL SEAL

NOVEX METAL SEAL

VALVE BODY

VALVE
BODY
(KEY 1)

SEAL RING
(KEY 4)

HUB SIDE
OF DISC

HIGH
PRESSURE
SHUTOFF
FLOW DIRECTION

RETAINING
RING
(KEY 2)

SPRING
(KEY 5)

DISC FACE

GRAPHITE
GASKET
(KEY 16)

BACKUP
O-RING
(KEY 15)

RESILIENT
INSERT

BIDIRECTIONAL SE AL

PTFE SEAL

RETAINING
RING

BIDIRECTIONAL SEAL

PHOENIX III METAL SEAL

VALVE
BODY
(KEY 1)

SEAL
RING
(KEY 4)

VALVE
BODY
(KEY 1)

SEAL RING
(KEY 4)

HUB SIDE
OF DISC

3. Installing the retainer ring:

a. Valves with PTFE seal rings do not require a retainer ring gasket (key 16).

b. Valves with metal seals require a retainer ring gasket (key 16). The gasket is not pre-punched for insertion of

retainer screws. The holes are not necessary for press-fit retainer rings.

CAUTION

When handling the new retainer ring gasket, be sure to avoid kinking, cracking, or breaking the gasket. Damage to the
gasket can cause leakage between the seal retainer and valve body.

c. Lay the gasket (key 16) down so that it is accurately centered on the valve body.

4. For valves with press-fit retainer rings

a. Wipe excessive oil off the retainer ring outside diameter, and off the retainer counterbore in the valve body.

b. Rotate the disc to the open position.

18

Instruction Manual

D500211X012

c. Lay the retainer ring on the valve body.

d. Use a press or a soft-faced hammer to press the retainer ring into its groove in the valve body.

A41 Valve

November 2012

CAUTION

It takes a considerable amount of force with a hammer to drive the retainer ring into place. Be sure not to damage retainer
ring surfaces when installing the ring.

e. Theretainerringisproperlyseatedwhenthefaceoftheretainerringisflushwiththefaceofthevalvebody.

f. To ensure proper seal performance for metal seals, you may need to use the hammer to drive the disc open for

the first few times. When closing the valve, use the C clamps discussed in the next few steps.

CAUTION

Do not damage the gasket seating surfaces on either the valve body or the retainer ring when installing or removing the
C-clamps. Protect the gasket surface by using a soft material between the clamp and valve body/retaining ring serrations
to avoid damage.

g. UsethreeC-clampstoholdtheretainerinplace.LocateoneoftheC-clampsnearthetravelstopinthevalve

body, and the other two at 120 degrees from the stop.

h. When cycling the disc for the first three times, use a dead-blow hammer, with a soft head to drive the disc

closed. Also, you may need to use the hammer to drive the disc open for the first few times.

5. For valves w ith screwed retainer rings

a. Match the retainer ring with the holes in the valve by punching two holes in the gasket to locate where the screw

holes are in the valve.

b. Lay the retainer ring over the gasket, while lining it up with the punched holes. Also insert two retainer screws

(key 17). Finger tighten them.

c. Press the remaining screws through the gasket material and finger tighten them. When all retainer screws are in

place, tighten them in a crisscross pattern.

d. The retainer ring is properly seated when the retainer face is flush with the face of the valve.

6. Turn the disc into and out of the seal ring several times, to help break in the seal and reduce actuator torque
requirements during adjustment.

7. If replacing the packing, remove all packing parts from the valve body. Upon re-assembly of the valve, refer to the
Packing Maintenance procedures to replace the packing.

Seal Ring Maintenance for NPS 2

Thisprocedureistobeperformedifthecontrolvalveisnotshuttingoffproperly(thatis,leakingdownstream).This
procedure does not require removing the actuator from the valve body. Part key numbers are shown in figure 12.

WARNING

Refer to the WARNING at the beginning of the Maintenance section in this instruction manual.

19

A41 Valve

November 2012

1. Isolate the control valve from line pressure, and relieve pressure from the valve body. Shut off and disconnect all
lines from the power actuator.

Instruction Manual

D500211X012

WARNING

The edges of a rotating disc have a shearing effect that may result in personal injury. To help prevent such injury, stay clear
of the disc edges when rotating the disc (key 3).

CAUTION

Damage to the disc (key 3) may occur if the disc is not closed when the valve is being removed from the pipeline. If
necessary, pressure the actuator temporarily to retain the disc in the closed position while removing the valve from the
pipeline.

2. Unscrewtheflangebolts,andremovethevalvefromthepipeline.

3. Unscrew the machine screws (key 8), and remove the seal retainer (key 2). Also remove the retainer clip (key 34).

4. Remove the seal ring or seal ring assembly (key 4). The spring (key 5) is removed with a PTFE seal ring.

5. For S31600 stainless steel seal ring assemblies, replace the gaskets (key 4C) if the entire seal ring assembly is not
replaced.Scrapeofftheoldgasketsfrom both sides of the seal ring and the seal ring sides of the valve body (key 1)
and seal retainer. Clean the gasket surfaces.

6. Reconnect or mount the actuator (if it was removed) before proceeding.

For an actuator with adjustable travel, also adjust the actuator before proceeding. This is necessary due to the
measurements that must be made during the actuator adjustment process.

Refer to the Actuator Mounting section of this manual and to the separate actuator instruction manual for mounting
and adjusting instructions.

7. The valve should be closed during seal ring installation to permit accurate centering of the seal. To install the new
seal ring:

For a PTFE seal, if the spring (key 5) was disassembled, hook the spring ends together. Work the spring into the recess
in the seal ring (key 4). Install the seal ring and spring assembly into the recess in the valve body as shown in figure 13.
For a complete S31600 stainless steel seal ring assembly, install the seal ring assembly as shown i n figure 13.

8. For an S31600 stainless steel seal ring on which the gaskets will be replaced, lay the following parts down in order so
that they are accurately centered on the valve: one new gasket; the seal ring oriented as shown in figure 13; and the
second new gasket.

9. Attach the seal retainer and, if used, the retainer clips and washers to the valve body and secure with the machine
screws. Tighten the machine screws evenly so as not to crack or break the S31600 stainless steel seal ring gaskets, if
used.

Be certain the disc is closed before installing the valve according to the Installation section of this instruction manual.

Disc, Drive Shaft, and Bearing Maintenance for NPS 3 through 12

This procedure is to be performed when replacing the valve disc, drive shaft, taper pins, hollow pins, and bearings due
to wear or damage to one or more component parts.

Partlocationsandkeynumbersareshowninfigures9and11unlessotherwisenoted.

20

Instruction Manual

D500211X012

A41 Valve

November 2012

Disassembly

1. If necessary, loosen the packing flange nuts (key 101). This allows the drive shaft (key 8) to turn without the friction
caused by the packing.

2. Remove the actuator, using the steps provided in the packing maintenance procedures above, and remove the seal
ring using the steps provided in the seal ring maintenance procedures above.

3. Placethevalveonaflatworkingsurfacewiththesealringslotfacingdown.

4. Use blocks to raise the valve body high enough to allow the disc to be rotated to the fully open position (figure 7).

5. Rotate the disc (key 3) to the fully open position.

6. Locatethesmallendsofthetaperpins.Drivethetwotaperpins(key10)outtowardsthelargerendofpins.(Note:
Attempting to drive the taper pins in the opposite direction only tightens the pins.) Also, remove the hollow pins
(key 9) from the disc/shaft connection using the tool shown in figure 11.

Note

Make the tools for removing and installing the hollow pin shown in figure 11.

7. Unscrew and remove the packing flange nuts (key 101), and the packing flange (key 102).

WARNING

Once the shaft has been removed in the following step, the disc may fall out of the valve body cavity. To avoid personal
injury and damage to disc sealing surfaces, support the disc to prevent it from falling as the shaft is being removed.

8. Pulltheshaftoutofthevalvebody,andremovethedisc(key3)fromthevalvebodybore.

9. If the packing is to be replaced, remove all packing parts from the valve body. Upon re-assembly of the valve, refer
tothePackingMaintenanceprocedurestoreplacethepacking.

10. Remove both of the bearings (key 6) from the valve body. For CL150 valves with metal bearings, refer to the
following note.

Note

CL150 valves with metal bearing assemblies have three parts. A disc spacer, bearing, and bearing spacer (keys 7, 6, and 13) are
used in place of a single piece bearing. The disc spacers may fall out of the valve when the disc is removed. If needed for
re-assembly, retain the disc spacer and bearing spacer parts.

11. Clean all of the sealing surfaces and parts, and inspect and/or replace before assembly.

Assembly

1. Install the bearings (key 6):

When installing the bearings in the opposite side of the valve body bore, repeat the following procedure.

D For PEEK/PTFE CL150 and CL300 metal bearings, one piece bearings: Position the bearing edge to match the valve

body bore, and insert the one piece bearing/disc spacer into the bearing bore with the bearing/spacer tab facing
away from the disc stop as shown in figure 10.

21

A41 Valve

November 2012

Figure 10. Orientation of Bearing/Spacer Tab

Instruction Manual

D500211X012

A6357

CENTER LINE OF
SHAFT BORE

DISC STOP

CENTER LINE OF
BODY & DISC SPACER

BEARING TAB OR
DISC SPACER TAB

D For CL150 metal bearings, three p iece assemblies: Metal bearings for CL150 valves are an assembly made up of

three parts: disc spacer, bearing, and bearing spacer (keys 13, 6, and 7) as shown in the orientation of
bearing/spacer tab shown in figure 10.

a. Install the bearing spacer (key 13) into the bearing bore.

b. Install the bearing into the bearing bore until the bearing is flush with the valve body bore.

c. When installing the disc spacer (key 7) position the curved side to match the valve body bore, and position it with

the tab on the spacer pointing away from the disc stop as shown in figure 10.

Note

The disc spacer will have to be held in place when installing the disc and inserting the shaft through the valve body, bearings,
bearing spacer, and disc. To help hold the spacer in place, apply lubricant.

2. Position the disc to be certain that the holes in the disc are towards the actuator side of the valve. Carefully insert
thediscintothevalvebodyborewhileprotectingthediscsealingsurfaces.

3. Install the shaft (key 8):

D For PEEK/PTFE CL150 and CL300 metal bearings, one piece bearings: Slide the shaft through the valve body bore

and bearing. Position the disc as stated above and slide the shaft through the disc and outer bearing. Refer to step 4
below.

D For CL150 metal bearing, three piece assemblies: Slide the shaft into the valve body bore and bearing spacer.

Positionthediscspacerasstatedaboveandholditinplace.Slidetheshaftthroughthebearingandintothedisc.
Position the second disc spacer, and hold it in place. Slide the shaft through the disc spacer and into the outer
bearing.

22

Instruction Manual

D500211X012

Figure 11. Taper Pin and Hollow Pin Removal and Installation

A41 Valve

November 2012

REMOVAL TOOL DIMENSIONS

Shaft

Diameter

A B C D

mm

12.7 3.91 28.43 6.35 4.19

15.88 4.60 38.10 7.87 23.37

19.05 5.13 44.45 9.65 5.41

25.4 7.00 59.44 12.70 7.26

31.75 9.50 76.20 19.05 9.78

38.1 10.82 88.90 19.05 11.10

44.45 12.37 114.30 22.35 12.65

Inch

0.5 0.154 1.12 0.25 0.165

0.625 0.181 1.50 0.31 0.192

0.75 0.202 1.75 0.36 0.213

1 0.275 2.34 0.50 0.286

1.25 0.374 3.00 0.75 0.385

1.5 0.426 3.50 0.75 0.437

1.75 0.487 4.50 0.88 0.498

B

C

 A

INSTALLATION TOOL DIMENSIONS

Shaft

Diameter

A B C D E

mm

12.7 12.7 3.68 6.35 127.0 4.83

15.88 12.7 4.57 7.62 127.0 4.83

19.05 12.7 5.23 8.89 127.0 4.83

25.4 12.7 7.00 10.41 127.0 4.83

31.75 19.05 10.00 13.59 146.0 6.35

38.1 19.05 11.56 15.24 146.0 6.35

44.45 19.05 31.21 16.76 146.0 6.35

Inch

0.5 0.50 0.145 0.250 5.00 0.19

0.625 0.50 0.180 0.300 5.00 0.19

0.75 0.50 0.206 0.350 5.00 0.19

1 0.50 0.275 0.410 5.00 0.19

1.25 0.75 0.395 0.535 5.75 0.25

1.5 0.75 0.455 0.600 5.75 0.25

1.75 0.75 0.520 0.660 5.75 0.25

D

E

15_

 C

 B

 A

0.03 X 45

0.010

0.010 X 45

UNDERCUT PER SIDE

DISC HUB

REMOVAL TOOL

NOTE:

1

REMOVE THE HOLLOW PIN FROM THIS SIDE OFTHE DISC HUB.

INSTALL THE HOLLOW PIN FROM THE OPPOSITE SIDE OF DISC HUB.

A6356

INSTALLATION
TOOL

HOLLOW PINVALVE DISC

FORWARD
FLOW

TAPER PIN AND HOLLOW PIN
LOCATION

1

0.06 X 45

REVERSE
FLOW

FACE SIDE OF DISC

23

A41 Valve

November 2012

Instruction Manual

D500211X012

Installing the Hollow Pin and Taper Pin

4. Placethevalvebodyonaflatworkingsurfacewiththeslotforthesealringfacingup. Block the valve body high
enough to allow the disc to be rotated into the open position as shown in figure 11.

Note

Make sure that the taper pins and hollow pins are free of particulate matter before continuing.

5. Rotate the disc to the open position. Locate the disc position mark on the end of the drive shaft. Rotate the shaft
until it is in the appropriate disc position as shown in figure 7.

6. Line up both holes in the disc hub with the holes in the drive shaft (key 8). (Note: The hole in the drive shaft is offset
topreventtheshaftfrombeinginstalledinthewrongposition.Besuretheholeintheshaftislinedupwiththehole
in the disc hub.)

7. Insert the hollow pins (key 9), into the disc hub as shown in figure 11.

Using the tool shown in figure 11, tap the hollow pin down into the disc hub and shaft until the pin bottoms on the
stop in the disc.

8. Insert the taper pins (key 10) into the hollow pins. Using a flat end punch, drive the taper pins into the hollow pins
until solid contact is felt. Anchor the pins in place by staking them with a center-punchandhammer.Thediscand
shaft should rotate smoothly.

9. Install the seal ring assembly using the appropriate instructions in the Seal Ring Maintenance procedures.

10. Install the packing parts using the appropriate instructions provided in the Packing Maintenance procedures. Refer
to the Actuator Mounting and Adjustment procedures before installing the valve in the pipeline.

Disc, Shaft Assembly and Bearing Maintenance for NPS 2

Thisprocedureistobeperformedtoreplacethevalvedisc,shaft,andtaperpinassemblyifthediscdoesnotrotatein
response to rotation of the actuator end of the valve shaft. Unless otherwise indicated, part key numbers are shown in
figure 13.

Disassembly

1. Remove the seal ring according to steps 1 through 5 of the Replacing Seal Ring section.

CAUTION

Use a wheel puller to separate actuator parts from the valve shaft. Drivingthe parts off the valve shaft could move the valve
bearings and disc away from the centered position, damaging the disc and valve.

2. Remove the cap screws and if used the hex nuts. Remove theclampifthestrapisused.Removetheactuatorfrom
the valve body while referring to the separate actuator instruction manual for assistance.

3. Rotate the disc (key 3) to the fully open position.

4. Locate the half of the disc that has two C markings cast into it as shown in figure 7. Drive the two taper pins (key 3C)
out toward the C-marked side of the disc. Attempting to drive the taper pins in the opposite direction only tightens
the pins.

24

Instruction Manual

D500211X012

A41 Valve

November 2012

5. Unscrew and remove the packing flange nuts (key 12), packing followers (keys 15 and 16), and packing flanges
(keys 9 and 10) if used, from both sides of the valve.

Table 6. Recommended Bolt Torques for Actuator/Mounting Cap Screws and Nuts

VALVE SIZE, NPS

2, 3, 4, 6, & 8 88 65

10 & 12 135 100

2, 3, 4, & 6 88 65

8&10 135 100

12 183 135

NSm lbSft

CL150 Valves

CL300 Valves

RECOMMENDED BOLT TORQUE

WARNING

Once the shaft has been removed in the following step, the disc may fall from the valve body. To avoid personal injury and
disc damage, support the disc to prevent it from falling as the shaft is being removed.

6. Pull the shaft out through the actuator side of the valve.

7. Remove the disc from the valve.

8. Remove the packing rings (key 13), the packing washers (key 27, figure 6) if used, and the packing box ring (key 14).

9. If either of the bearings (key 6) require maintenance or replacement, remove them.

CAUTION

When replacing a valve disc or shaft, a new disc/shaft/taper pin assembly (key 3) should be used. Using a new disc with a
used shaft requires drilling and reaming new taper pin holes in the shaft. The extra set of taperpin holes weakens the shaft
and may cause it to fail in service.

10. Clean the packing boxes and metal packing box parts.

Assembly

1. Dropinthenewbearings.Makesuretoorientthetabinthebearingwiththeslotintheseal.

2. Insert the disc into the valve body. Be certain the taper pin holes in the disc are on the actuator side of the valve.
Also be certain the letter C stamped on either face of thediscisonthesamesideofthevalveastheletterC
stampedontheoutsideofthevalve(figure7).

3. Slide the shaft through the valve body and disc.

4. Install the disc and spacers into the valve body. Insert the shaft into the valve body and through the disc.

5. Slide the shaft all the way into the valve body.

6. To ensure that the direction of taper in the shaft taper pin holes matches that of the disc taper pin holes,
temporarily install the packing follower (key 15) or, if used, the packing flange (key 9) with rotation tag (key 19).
With the disc fully opened, rotate the shaft until the line on the end of the shaft indicates the OPEN position as
shown in figure 7. Insert the taper pins (key 3C), small end first, into the taper pin holes on the C-marked side of the
disc. Do not drive in the pins. Remove the packing follower or flange.

7. Insert a packing box ring (key 14) into each packing box.

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A41 Valve

November 2012

Instruction Manual

D500211X012

8. Install the packing according to the appropriate instructions presented in steps 5 through 8 of the Replacing
Packing section.

9. Drive in the taper pins securely.

10. Rotate the disc to the closed position.

To install the seal ring and complete t he assembly, follow the procedures presented in steps 5 through 9 of the
ReplacingSealRingsection.

Actuator Mounting

Re-install the seal ring and packing rings using the appropriate procedures before installing the actuator or handlever.
Mount the actuator on the valve in accordance with the Actuator Mounting section in the actuator or handlever
instruction manual.

In the Packing Maintenance/Removing the Actuator steps, you should have noted the position of the mark on the end
of the valve shaft, and its relationship to the actuator shaft. If not, determine the configuration needed to match your
application.

Be certain that the disc is rotating counterclockwise to open when viewed from the actuator side of the valve and that
the disc is not rotated beyond its limits.

1. Orientate the valve drive shaft correctly to match the actuator or handlever position, install the actuator coupling,
and hold it in place while matching the actuator mounting pads with each other.

2. Tighten the actuator-mounting cap screws to the appropriate bolt torque from table 6.

CAUTION

The valve disc travel stop in the valve body bore is not to be used as a power actuator travel stop (see figure 7). Use the
actuator travel stops to limit therotationofthevalvedisc.Itispossibledamagetothevalvecomponentpartsmayoccurif
full actuator thrust is applied to the valve disc travel stop.

Note

To obtain proper shutoff, the closed position of the A41/8560 valves must be set with the disc parallel to the retaining ring. Don't
use the disc stop to set the actuator travel stops.

3. Adjust the actuator travel stop to limit the open and closed positions of the valve disc. (If necessary, refer to the
actuator instruction manual for more information about adjustments.) Do not use the disc stop as a actuator travel
stop as discussed in the Caution above.

4. For actuators with adjustable turnbuckles, adjust the turnbuckle to bring the disc to the fully closed position at the
end of the actuator stroke. If necessary, refer to the appropriate actuator instruction manual for assistance.

5. If using a manual handwheel or handlever actuator, refer to the appropriate actuator instruction manual for
mounting positions and adjustments.

6. To determine the fully closed disc position (zero degrees of disc rotation), measure the distances between the
positions on the disc face as shown in figure 7. Use the actuator to rotate the disc while re-checking the two
measurements. Repeat adjustment until the two measurements are equal.

26

Instruction Manual

D500211X012

A41 Valve

November 2012

Parts Ordering

When corresponding with your Emerson Process Management sales office about this equipment, always mention the
valve serial number. When ordering replacement parts, also specify the key number, part name, desired material,
using the Parts List table.

WARNING

Use only genuine Fisher replacement parts. Components that are not supplied by Emerson Process Management should
not, under any circumstances, be used in any Fisher valve, because they may void your warranty, might adversely affect the
performance of the valve, and could cause personal injury and property damage.

ENVIRO-SEAL Packing Arrangements

Retrofit kits and repair kits are listed in the following tables. For additional parts and repair information, refer to the
ENVIRO-SEAL Packing System for Rotary Valves Instruction Manual (D101643X012) or contact your Emerson Process
Management sales office for assistance.

Retrofit Kits for ENVIRO-SEAL Packing

Retrofit kits include new parts for the key numbers listed in the table below (see figure 6 for part locations).

PARTS INCLUDED IN KIT

Key Description

100 Packing stud

101 Packing nut

102 Packing flange

103 Spring pack ass'y

105 Packing set

106 Anti-extrusion washer

107 Packing box ring

111 Tag

112 Tie cable

1. Diameter through the packingbox.

ENVIRO-SEAL Packing System Retrofit Kits For Fisher A41

SHAFT DIAMETER SHAFT DIAMETER SINGLE PTFE PACKING GRAPHITE PACKING

mm Inches For Actuator End Packing Box For Actuator End Packing Box

12.7

15.9

19.1

25.4

31.8

38.1

1/2
5/8
3/4

1
1-1/4
1-1/2

RRTYXRT0972
RRTYXRT0982
RRTYXRT0992

RRTYXRT1012
RRTYXRT1022
RRTYXRT1032

RRTYXRT1072
RRTYXRT1082
RRTYXRT1092

RRTYXRT1102
RRTYXRT1112
RRTYXRT1122

27

A41 Valve

November 2012

Repair Kits for ENVIRO-SEAL Packing

Repair kits include replacement parts for key 105 and 106 for the shaft diameters listed below.

Instruction Manual

D500211X012

ENVIRO-SEAL Packing Repair Kits

SHAFT DIAMETER

mm Inches

12.7 1/2

15.9 5/8

19.1 3/4

25.4 1

31.8 1-1/4

38.1 1-1/2

Parts Included in Kit

Key Description

105 Packing set

106 Anti-extrusionwasher

1. Diameter through the packingbox.

Parts List

Note

Part numbers are shown for recommended spares only. For part
numbers not shown, contact your Emerson Process Management sales
office.

Key Description Part Number

1ValveBody

If you need a new valve body, please order by valve

size, serial number and desired material.
2* Seal Retainer See following table
3ValveDisc
3 Disc/Shaft Assembly,NPS 2 only
4* Seal Ring

PTFE

NPS 2 75B0387X012
NPS 3 75B0020X012
NPS 4 75B0042X012
NPS 6 75B0003X012
NPS 8 75B0311X012
NPS 10 75B0312X012
NPS 12 75B0313X012

UHMWPE

NPS 2 75B0387X022
NPS 3 75B0020X022
NPS 4 75B0042X022
NPS 6 75B0003X022
NPS 8 75B0311X022
NPS 10 75B0312X022
NPS 12 75B0313X022

Glass filled PTFE

NPS 2 75B0387X032
NPS 3 75B0020X032
NPS 4 75B0042X032

(1)

Key Description Part Number

NPS 6 75B0003X032
NPS 8 75B0311X032
NPS 10 75B0312X032
NPS 12 75B0313X032

NOVEX S31600SST

NPS 2 17A7544X022
NPS 3 75B1108X012
NPS 4 75B1109X012
NPS 6 75B1110X012
NPS 8 75B0341X012
NPS 10 75B1112X012
NPS 12 75B1113X012

NOVEX S21800

NPS 3 75B1108X022
NPS 4 75B1109X022
NPS 6 75B1110X022
NPS 8 75B0341X022
NPS 10 75B1112X022
NPS 12 75B1113X022

Phoenix III S31600/PTFE

NPS 3 75B1115X012
NPS 4 75B1116X012
NPS 6 75B1117X012
NPS 8 75B0351X012
NPS 10 75B0337X012
NPS 12 75B0339X012

5* Spring

S31600 SST

NPS 2 12A9022X012
NPS 3 75B0021X012
NPS 4 75B0043X012
NPS 6 75B0004X012
NPS 8 75B0012X012
NPS 10 75B0029X012
NPS 12 75B0036X012

R30003

NPS 2 12A9022X062
NPS 3 75B0021X052
NPS 4 75B0043X052

28

*Recommended spare parts

Instruction Manual

D500211X012

A41 Valve

November 2012

Key Description Part Number

NPS 6 75B0004X052
NPS 8 75B0012X052
NPS 10 75B0029X052
NPS 12 75B0036X052

6* Bearing (2 req'd)

PEEK/PTFE

NPS 2 75B0620X012
NPS 3

CL150 75B1066X012
CL300 75B1073X012

NPS 4

CL150 75B1067X012
CL300 75B1074X012

NPS 6

CL150 75B1068X012
CL300 75B1075X012

PEEK/PTFE

NPS 8

CL150 75B1069X012
CL300 75B1076X012

NPS 10

CL150 75B1070X012
CL300 75B1077X012

NPS 12

CL150 75B1071X012
CL300 75B1078X012

316/Nitride

NPS 2 75B0599X012
NPS 3

CL150 75B1136X012
CL300 75B1099X012

NPS 4

CL150 75B1136X022
CL300 75B1100X012

NPS 6

CL150 75B1136X032
CL300 75B1101X012

NPS 8

CL150 75B1136X042
CL300 75B1102X012

NPS 10

CL150 75B1136X052
CL300 75B1103X012

NPS 12

CL150 75B1136X062
CL300 75B1104X012

7* Disc Spacer w/ MetalBearings, CL150 only (2 req'd)

NPS 3 75B1176X012
NPS 4 75B1176X022
NPS 6 75B1176X032
NPS 8 75B1176X042
NPS 10 75B1176X052

NPS 12 75B1176X062
8* Drive Shaft See following table
9* Hollow Pin See following table
10* Taper Pin See following table
13* Bearing Spacer (2 req'd)

w/ MetalBearings, CL150 only

NPS 3 75B1137X012
NPS 4 75B1137X022
NPS 6 75B1137X032
NPS 8 75B1137X042
NPS 10 75B1137X052
NPS 12 75B1137X062

Key Description Part Number

14 Hex Head Cap Screw, Steel
14 Stud Bolt, SST
15* Backup Ring See following table
16* Gasket, Graphite

w/ Metal and Phoenix III seals

NPS 3 75B1124X022
NPS 4 75B1124X032
NPS 6 75B1124X042
NPS 8 75B1545X012
NPS 10 75B1545X022

NPS 12 75B1545X032
17 Hex Socket Cap Screw
18 Mfg Label
19 Drive Screw, w/ nameplate
20 Hex Nut
21 Nameplate
22 Lead Seal & Wire
23 Bottom Cap, NPS 12 only
24 Bottom Cap Stud, NPS 12 only
25 Bottom Cap Hex Nut, NPS 12 only
27* Bottom Cap Gasket, NPS 12 only

PTFE 75B1186X022

Graphite 75B1186X012
29 Flow Arrow, NPS 3-12
30 Retainer Clip, NPS 2 only

Packing

SHAFT DIAMETER

1/2 2&3 2

5/8 4 3

3/4 6 4

1 8 6

1-1/4 10 8

1-1/2 12 10

1-3/4 --- 12

Note

Part numbers in this section are listed by shaft diameter (inches).

Key Description Part Number

100 PackingStud(2req'd)
101 Packing Nut (2 req'd)
102 Packing Flange
103 Spring Pack Assembly, ENVIRO-SEAL & KALREZr
105* Packing Set

PTFE/Carbon filled PTFE

1/2 inch 12A9016X022
5/8 inch 1R5795X0012
3/4 inch 12A8995X022
1-inch 12A8832X022
1-1/4 inch 12A8951X022

CL150 CL300

VALVE SIZE

*Recommended spare parts

29

A41 Valve

November 2012

Instruction Manual

D500211X012

Key Description Part Number

1-1/2 inch 12A8935X022
1-3/4 inch 12A9057X022

ENVIRO-SEAL PTFE

1/2 inch 12B7053X012
5/8 inch 12B7402X012
3/4 inch 12B7414X012
1-inch 12B7438X012
1-1/4 inch 12B7450X012
1-1/2 inch 12B7462X012
1-3/4 inch 14B3049X012

ENVIRO-SEAL Graphite

1/2 inch 13B8816X012
5/8 inch 13B8816X032
3/4 inch 13B8816X052

ENVIRO-SEAL Graphite

1-inch 13B8816X092
1-1/4 inch 13B8816X112
1-1/2 inch 13B8816X142
1-3/4 inch 13B8816X152

KALREZ/PTFE

1/2 inch 24B6254X012
5/8 inch 24B6254X022
3/4 inch 24B6254X032
1-inch 24B6254X052
1-1/4 inch 24B6254X062
1-1/2 inch 24B6254X072

KALREZ/CRCC

1/2 inch 24B6255X012
5/8 inch 24B6255X022
3/4 inch 24B6255X032
1-inch 24B6255X052
1-1/4 inch 24B6255X062
1-1/2 inch 24B6255X072

106* Anti-ExtrusionRing, ENVIRO-SEAL PTFE

1/2 inch 12B7054X012
5/8 inch 12B7406X012
3/4 inch 12B7418X012

Key Description Part Number

1-inch 12B7442X012
1-1/4 inch 12B7454X012
1-1/2 inch 12B7466X012
1-3/4 inch 14B3045X012

107* Packing Box Ring

Standard and ENVIRO-SEAL Packing

1/2 inch 16A6082X012
5/8 inch 16A6083X012
3/4 inch 16A6084X012
1-inch 16A6085X012
1-1/4 inch 16A6086X012
1-1/2 inch 16A6087X012
1-3/4 inch 12A9058X012

KALREZ

1/2 inch 14B6188X012
5/8 inch 14B6190X012
3/4 inch 14B6191X012
1-inch 14B6195X012
1-1/4 inch 14B6197X012
1-1/2 inch 14B6198X012

108* Packing Ring, Graphite Ribbon

1/2 inch 12A9134X012
5/8 inch 12A9135X012
3/4 inch 12A9136X012
1-inch 12A9137X012
1-1/4 inch 12A9138X012
1-1/2 inch 12A9139X012

1-3/4 inch 12A9140X012
111 Tag
114 Packing Follower
115 Packing Washer, Graphite Ribbon

1/2 inch 14A8362X012

5/8 inch 14A9771X012

1-inch 14A8365X012

1-1/4 inch 14A8366X012

1-1/2 inch 14A8367X012

1-3/4 inch 14A9772X012

30

*Recommended spare parts

Instruction Manual

D500211X012

Key 2*. Seal Retainer

VALVE STYLE

Wafer

Wafer

Single Flange

Single Flange

VALVE SIZE,

NPS

2 75B0385X012 75B0385X022 75B0385X032 75B0385X042 75B0385X062 75B0385X052
3 75B0019X012 75B0019X022 75B0019X032 75B0019X042 75B0019X062 75B0019X052
4 75B0041X012 75B0041X022 75B0041X032 75B0041X042 75B0041X062 75B0041X052
6 75B0002X012 75B0002X022 75B0002X032 75B0002X042 75B0002X062 75B0002X052

8 75B0010X012 75B0010X022 75B0010X032 75B0010X042 75B0010X062 75B0010X052
10 75B0027X012 75B0027X022 75B0027X032 75B0027X042 75B0027X062 75B0027X052
12 75B0034X012 75B0034X022 75B0034X032 75B0034X042 75B0034X062 75B0034X052

2 21B4667X012 21B4667X022 --- --- --- ---

3 75B1040X012 75B1040X072 75B1040X082 --- --- ---

4 75B1041X012 75B1041X072 75B1041X082 --- --- ---

6 75B1042X012 75B1042X072 75B1042X082 --- --- ---

8 75B1539X012 75B1539X022 75B1539X032 --- --- --­10 75B1540X012 75B1540X022 75B1540X032 --- --- --­12 75B1541X012 75B1541X022 75B1541X032 --- --- ---

3 75B0085X012 75B0085X022 75B0085X032 75B0085X042 75B0085X062 75B0085X052

4 75B0078X012 75B0078X022 75B0078X032 75B0078X042 75B0078X062 75B0078X052

6 75B0050X012 75B0050X022 75B0050X032 75B0050X042 75B0050X062 75B0050X052

8 75B0060X012 75B0060X022 75B0060X032 75B0060X042 75B0060X062 75B0060X052
10 75B0067X012 75B0067X022 75B0067X032 75B0067X042 75B0067X062 75B0067X052
12 75B0074X012 75B0074X022 75B0074X032 75B0074X042 75B0074X062 75B0074X052

3 75B1047X132 75B1047X072 75B1047X082 --- --- ---

4 75B1048X132 75B1048X072 75B1048X082 --- --- ---

6 75B1049X132 75B1049X072 75B1049X082 --- --- ---

8 75B1542X012 75B1542X022 75B1542X032 --- --- --­10 75B1543X012 75B1543X022 75B1543X032 --- --- --­12 75B1544X012 75B1544X022 75B1544X032 --- --- ---

A41 Valve

November 2012

MATERIAL

Steel CF8M CG8M CN7M CW2M M35-1

PTFE Seal Ring

NOVEX and Phoenix III Seal Ring

PTFE Seal Ring

NOVEX and Phoenix III Seal Ring

Key 8*. Shaft

VALVE SIZE, NPS

(1)

2

3 75B1105X012 75B1105X072 75B1105X132 75B1105X252 75B1105X192

4 75B1105X022 75B1105X082 75B1105X142 75B1105X262 75B1105X202

6 75B1105X032 75B1105X272 75B1105X152 75B1105X272 75B1105X212

8 75B1105X042 75B1105X102 75B1105X162 75B1105X282 75B1105X222

10 75B1105X052 75B1105X112 75B1105X172 75B1105X292 75B1105X232

12 75B1105X062 75B1105X122 75B1105X182 75B1105X302 75B1105X242

3 75B1106X022 75B1106X092 75B1106X162 75B1106X302 75B1106X232

4 75B1106X032 75B1106X102 75B1106X172 75B1106X312 75B1106X242

6 75B1106X042 75B1106X112 75B1106X182 75B1106X322 75B1106X252

8 75B1106X052 75B1106X122 75B1106X192 75B1106X332 75B1106X262

10 75B1106X062 75B1106X132 75B1106X202 75B1106X342 75B1106X272

12 75B1106X072 75B1106X142 75B1106X212 75B1106X352 75B1106X282

1. The NPS 2 valveis multi-rated to CL150, 300 and 600.

*Recommended spare parts

S17400 H1075 S20910 N08020 N10276 N05500

75B0608X012 75B0608X022 75B0608X032 75B0608X042 75B0608X052

MATERIAL

CL150

CL300

31

A41 Valve

November 2012

Instruction Manual

D500211X012

Key 9*. Hollow Pin (2 req'd)

CL150 CL300

VALVE SIZE,

NPS

3 75B1122X012 75B1122X082 75B1122X222 75B1122X152 75B1122X022 75B1122X092 75B1122X232 75B1122X162

4 75B1122X022 75B1122X092 75B1122X232 75B1122X162 75B1122X032 75B1122X102 75B1122X242 75B1122X172

6 75B1122X032 75B1122X102 75B1122X242 75B1122X172 75B1122X042 75B1122X112 75B1122X252 75B1122X182

8 75B1122X042 75B1122X112 75B1122X252 75B1122X182 75B1122X052 75B1122X122 75B1122X262 75B1122X192

10 75B1122X052 75B1122X122 75B1122X262 75B1122X192 75B1122X062 75B1122X132 75B1122X272 75B1122X202

12 75B1122X062 75B1122X132 75B1122X272 75B1122X202 75B1122X072 75B1122X142 75B1122X282 75B1122X212

S17400

H1075 &

S20910

Shaft Material Shaft Material

N08020 N10276 N05500

S17400

H1075 &

S20910

N08020 N10276 N05500

Key 10*. Taper Pin (2 req'd)

CL150 CL300

VALVE SIZE,

NPS

2 12A9019X072 12A9019X052 12A9019X042 12A9019X032 12A9019X072 12A9019X052 12A9019X042 12A9019X032

3 19A3749X012 19A3749X042 --- 19A3749X032 F14119X0052 F14119X0062 F14119X0072 F14119X0082

4 F14119X0052 F14119X0062 F14119X0072 F14119X0082 G11299X0032 G1129940092 G1129940152 G1129940022

6 G11299X0032 G1129940092 G11299400152 G1129940022 F13668X0022 F1366840092 F13668X0032 F1366840022

8 F13668X0022 F1366840092 F13668X0032 F1366840022 G13725K0022 G1372540092 G13725X0082 G1372540022

10 G13725K0022 G1372540092 G13725X0082 G1372540022 75B0333X012 75B0333X022 75B0333X032 75B0333X042

12 75B0333X012 75B0333X022 75B0333X032 75B0333X042 75B0334X012 75B0334X022 75B0334X032 75B0334X042

S17400

H1075 &

S20910

Shaft Material Shaft Material

N08020 N10276 N05500

S17400

H1075 &

S20910

N08020 N10276 N05500

Key 15*. Backup Ring (Use w/ Phoenix III Seal)

VALVE SIZE, NPS

3 75B1123X022 75B1123X092 75B1123X162 75B1123X502 75B1123X442

4 75B1123X032 75B1123X102 75B1123X172 75B1123X512 75B1123X452

6 75B1123X042 75B1123X112 75B1123X182 75B1123X522 75B1123X462

8 V110611X032 V110611X022 V110611X042 V110611X072 V110611X062

10 75B0344X012 75B0344X022 75B0344X032 75B0344X062 75B0344X052

12 75B0340X012 75B0340X022 75B0340X032 75B0340X062 75B0340X052

EPR FKM Fluorocarbon CR Chloroprene Filled Silicone NBR

MATERIAL

32

*Recommended spare parts

Instruction Manual

D500211X012

Figure 12. Wafer Valve Assembly for the NPS 3 through 12

A41 Valve

November 2012

ALLOY FOLLOWER

ASSY

NOVEX SEAL

PHOENIX III SEAL

NOTE:
KEYS21,22,AND28ARENOTSHOWN.

75B0094-B

PTFE SEAL

METAL BEARING

CL150

SIZE 12 CL300

33

A41 Valve

November 2012

Figure 12. Wafer Valve Assembly for the NPS 3 through 12 (continued)

Instruction Manual

D500211X012

PTFE SEAL

34B5064-A

GRAPHITE PACKING

ALLOY FOLLOWER

ASSY

METAL BEARING

CL150

34

NOVEX SEAL

PHOENIX III SEAL

NOTE:
KEYS 21, 22, AND 28ARE NOT SHOWN

75B0096-B

SIZE 12 CL300

Instruction Manual

D500211X012

Figure 13. Valve Assembly for NPS 2

A41 Valve

November 2012

GRAPHITE PACKING

NOTE: PARTS 21 AND 22 NOT SHOWN

75B0625

PTFE SEAL

METAL SEAL

34B5064-A

TWO PIECE FOLLOWER

35

A41 Valve

November 2012

Instruction Manual

D500211X012

Neither Emerson, Emerson Process Management, nor any of their affiliated entities assumes responsibility for the selection,use or maintenance
of any product. Responsibility for proper selection,use, and maintenance of any product remainssolely with the purchaser andend user.

Fisher and ENVIRO-SEAL are marks owned by one of the companies in the Emerson Process Management business unit of Emerson Electric Co. Emerson
Process Management, Emerson, and the Emerson logo are trademarks and service marks of Emerson Electric Co. KALREZ is a mark owned by E.I. DuPont De
Nemours Co. All other marks arethe property of their respective owners.

The contents of this publication are presented for informational purposes only, and while every effort has been made to ensure their accuracy, they arenot
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, whichare availableupon request.We reservethe right to modify or improve the designs or specifications of such
products at any time without notice.

Emerson Process Management
Marshalltown, Iowa 50158 USA
Sorocaba, 18087 Brazil
Chatham, Kent ME4 4QZ UK
Dubai, United Arab Emirates
Singapore 128461 Singapore

www.Fisher.com

36

E 1994, 2012 Fisher Controls International LLC. All rights reserved.