Emerson Fisher POSI-SEAL A31D Instruction Manual

Instruction Manual

D500248X012

Fisherr POSI-SEAL™ A31D Double-Flange
High-Performance Butterfly Valve

A31D Valve

April 2014

Contents

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

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

Description 2.................................

A31D Valve Specifications and Materials

of Construction 2...........................

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

Installation 3..................................

Valve Orientation 5............................

Before Installing the Valve 5.....................

Adjusting the Actuator Travel Stops or Travel 7.....

Installing the Valve 7...........................

Packing Adjustment and Shaft Bonding 8.........

Maintenance 10................................

Removing and Replacing the Actuator 10.........

Packing Maintenance 11........................

Removing the Valve 11.........................

Seal Maintenance 12...........................

PTFE Seals 12.............................

NOVEX, Phoenix III and/or

Phoenix III Fire-Tested Seals 14............

Anti-Blowout Design, Packing, Valve Shaft,

Disk, and Bearing Maintenance 17.............

Installing the Two-Piece Shaft 20.............

Gasket Retainer 22............................

Parts Ordering 23...............................

Parts List 25...................................

Figure 1. Fisher A31D Valve with 2052 Actuator

X0704

Introduction

Scope of Manual

This instruction manual includes installation, maintenance, and parts ordering information for Fisher POSI-SEAL A31D
double-flange high-performance butterfly valves (see figure 1). Refer to separate instruction manuals for information
covering the actuator and accessories.

Do not install, operate, or maintain an A31D valve 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.

www.Fisher.com

A31D Valve

April 2014

Instruction Manual

A31D Valve Specifications and Materials of Construction

Table 1. Fisher A31D Valve Specifications

SPECIFICATION

Valve Body Size NPS 3, 4, 6, 8, 10, 12, 14, 16, 18, 20, and 24

Pressure Rating Consistent with CL150 and 300 per ASME B16.34

Valve Body Materials

Disk Materials CF8M Stainless Steel

End Connections Mates with RF flanges per ASME B16.5

Valve Body Style Double Flange

Shaft Connection

Face-to-Face Dimensions

Shutoff

Flow Direction Reverse (flow directionis into the shaft sideof the disk)

Flow Characteristic Approximately Linear

Disk Rotation Clockwise (CW) to close

1, 0.1 scfh per unitof NPS at 80 psi.

CL150: ISO 5752 Butterfly Valve Short Series

CL300: ISO 5752 Butterfly Valve Long Series

Soft Seal: Bidirectional ANSI/FCI 70-2 Class VI

NOVEX Seal: Unidirectional MSS SP-61

Phoenix III Seal: ANSI/FCI 70-2 Class VI

WCC Steel

CF8M Stainless Steel

Spline (standard)

Keyed (optional)

(1)

D500248X012

Description

The valve is available in a doubleflanged valve body design, with a variety of seals and internal components. The
pressureassisted seal provides tight shutoff against the full classpressurerangeforthespecifictype.Thesplinedshaft
combines with a variety of Fisher springanddiaphragm or pneumatic double-acting or spring-return piston actuators.
Maximum inlet pressure/temperature ratings are consistent with ASME CL150 and CL300.

Educational Services

For information on available courses for the Fisher POSI-SEAL A31D valve, as well as a variety of other products,
contact:

Emerson Process Management
Educational Services - Registration
P.O. Box 190
Marshalltown, IA 50158-2823
Phone: [phone] or 641-754-3771
FAX: [phone]
e-mail: [e-mail]

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Instruction Manual

D500248X012

A31D Valve

April 2014

Installation

Recommended or ”preferred” installation for the A31D valve is with the flow into the shaft side of the disk (retaining
ring downstream from the high pressure side of the valve).

The standard soft seal and standard Phoenix III seal offer ANSI/FCI 70-2 Class VI, bidirectional shutoff. The Phoenix III
seal for fire-tested applications must be installed in the preferred direction. The Novex seal is unidirectional and should
be installed in the preferred direction. See table 3.

For assistance in selecting the appropriate combination of actuator action and open valve position, consult your
Emerson Process Management sales office.

WARNING

To avoid personal injury or property damage resulting from the sudden release of pressure:

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

injury.

D Do not install the valve assembly where service conditions could exceed the limits given in this manual or on the

nameplates.

D Use pressure-relieving devices as required by government or accepted industry codes and good engineering practices

to protect from over-pressurizing the system.

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

media.

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

instruction manual.

CAUTION

When ordered the valve configuration and construction materials were selected to meet particular pressure, temperature,
pressure drop, and controlled fluid conditions. Responsibility for the safety of process media and compatibility of valve
materials rests solely with the purchaser and end-user. Since some body/trim material combinations are limited in their
pressure drop and temperature range capabilities, do not apply any other conditions to the valve without first contacting
your Emerson Process Management sales office.

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, shut off all pressure lines to the power
actuator, release pressure from the actuator, and disconnect the pressure lines from the actuator. Use lock-out
procedures to be sure that the above measures stay in effect while you are working on the equipment.

WARNING

See the WARNING at the beginningof the Maintenance section for more information before removing the valve from the
pipeline.

2. Install a three-valve bypass around the control valve assembly if continuous operation is necessary during

inspection and maintenance of the valve.

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

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CAUTION

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

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.

Installing Double-Flange Valves

WARNING

The edges of a rotating valve disk have a shearing effect that may result in personal injury. To avoid personal injury, keep
clear of the disk edges when rotating the disk.

CAUTION

To avoid damage to the valve disk during installation, the valve must be in the fully closed position. If the A31D valve is
equipped with a fail-open actuator, remove the actuator before installing the valve/actuator assembly or cycle the valve
into the fully closed position. Then, take appropriate steps to ensure that the actuator does not cause the valve to open
during installation.

1. See table 2 for flange bolt specifications.

2. Properly orient the valve according to the specific application. For optimum performance, install the valve so that

the shaft will be on the high pressure side of the valve at shutoff.

3. Position the valv e between the flanges. Be sure to leave enough room for the flange gaskets. Install the lower flange

bolts.

4. Select the appropriate gaskets for the application. Flat sheet, spiral wound, or other gasket types, made to the

ASME B16.5 group standard or user's standard, can be used on the valve depending on the service conditions of the
application. Install the gaskets and align the valve and the gaskets.

5. Install the remaining bolts.

6. Tighten the flange bolts in an alternating criss-cross fashion to a torque value of one-forth of the final bolting

torque. Repeat this procedure several times increasing the torque value each time by a forth of the final desired
torque. When the final torque value has been applied, tighten each flange bolt again to allow for gasket
compression.

WARNING

An A31D valve body is not grounded when installed in a pipeline. To avoid personal injury or property damage, always
make sure that the valve body is grounded to the pipeline before putting the valve assembly into operation in a flammable
or hazardous atmosphere. To provide shaft and disk-to-body grounding, attach a grounding strap to the shaft with a clamp
and connect the other end of the grounding strap assembly to the valve body.

7. If necessary, attach a grounding strap from the valve body or pipeline to the valve shaft. For additional information

on grounding procedures, contact your Emerson Process Management sales office.

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A31D Valve

Table 2. Stud Bolt and Cap Screw Chart for Double-Flange Valves

VALVE SIZE, NPS

No. of Through Holes 8 8 8 8 16 16 16 24 24 32 32

No. ofTapped Holes --- 8 8 8 8 8 8 8 8 8 8

Size-Dia. Inch & Thread 5/8 - 11 5/8 - 11 3/4 - 10 3/4 - 10 7/8 - 9 7/8 - 9 1-8 1-8 1-1/8 1-1/8 1-1/4 - 8

No. of Stud Bolts 8 8 8 8 16 16 16 24 24 32 32

A-Length of Stud Bolts

No. of Cap Screws --- 8 8 8 8 8 8 8 8 8 8

B-Length of Cap Screws

No. of Heavy Hex Nuts 16 16 16 16 32 32 32 48 48 64 64

VALVE SIZE, NPS

No. of Through Holes 16 16 24 24 32 24 32 32 40 40 40

No. ofTapped Holes --- --- --- --- --- 8 8 8 8 8 8

Size-Dia. Inch & Thread 3/4 - 10 3/4 - 10 3/4 - 10 7/8 - 9 1-8 1-1/8 - 8 1-1/8 - 8 1-1/4 - 8 1-1/4 - 8 1-1/4 - 8 1-1/2 - 8

No. of Stud Bolts 16 16 24 24 32 24 32 32 40 40 40

A-Length of Stud Bolts

No. of Cap Screws --- --- --- --- --- 8 8 8 8 8 8

B-Length of Cap Screws

No. of Heavy Hex Nuts 32 32 48 48 64 48 64 64 80 80 80

(1)

,Inch 4 4-1/2 4-3/4 4-3/4 5-1/2 5-1/2 5-3/4 5-3/4 6-1/4 6-1/2 7-3/8

(2)

,Inch --- 2-1/2 2-1/2 2-3/4 3 3 2-3/4 3 3-1/4 3-1/4 3-3/4

(1)

,Inch 4-1/2 5 5-1/4 6 6-3/4 7-1/4 7-1/2 8 8-1/2 8-3/4 9-3/4

(2)

,Inch --- --- --- --- --- 4-3/4 4-3/4 4-1/4 4-1/4 4-1/2 5

3 4 6 8 10 12 14 16 18 20 24

3 4 6 8 10 12 14 16 18 20 24

A31D, CL150, ISO 5752 BUTTERFLY SHORT SERIES

A31D, CL300, ISO 5752 BUTTERFLY LONG SERIES

April 2014

1. Based on
1/8-inch gasket

A

B

A

2. Optional Alternative for Cap Screws

Valve Orientation

The valve can be installed in any orientation, however, it is recommended that the valve drive shaft be horizontal and
the actuator vertical.

Before Installing the Valve

WARNING

The edges of a rotating valve disk (key 2, figure 9, 10, or 11) close with a shearing, cutting motion. To avoid personal injury,
keep hands, tools, and other objects away from the disk while stroking the valve.

If the A31D valve is equipped with a fail-open actuator, cycle the valve into the fully closed position. Ensure the valve
cannot open during installation by using travel stops, a manual actuator, a constant supply pressure to the pneumatic
actuator, or other steps as necessary.

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A31D Valve

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Figure 2. Available Seal Configurations

Instruction Manual

D500248X012

BACKUP
RING

SOFT SEAL WITH

BODY

VALVE DISK

RETAINING

RING

BODY

VALVE DISK

NOVEX SEAL

NOVEX
SEAL RING

HIGH PRESSURE
AT SHUTOFF

SEAL RING

RETAINING
RING

1

BACKUP O-RING

BODY

BACKUP
RING

RETAINING
RING

VALVE DISK

METAL
SEAL
RING

RESILIENT INSERT

HIGH PRESSURE
AT SHUTOFF

1

PHOENIX III

FIRE-TESTED SEAL

NOTE:

1

FOR OPTIMUM SEAL PERFORMANCE, THE PREFERRED VALVE ORIENTATION AT SHUTOFF IS WITH THERETAINING RING DOWNSTREAM FROM THE HIGH PRESSURE SIDE OF THE VALVE.

HIGH PRESSURE
AT SHUTOFF

1

Table 3. Valve Orientation forOptimalSealPerformance

SEAL TYPE SHUTOFF DIRECTION INSTALLED ORIENTATION

Standard soft seal Bidirectional Preferred

Novex seal Unidirectional Preferred only

Phoenix III seal

Recommended or ”preferred” installation for the A31D valve is with the flow into the shaft side ofthe disk (retaining ringdownstream from the high pressure side of the valve).

Bidirectional

Unidirectional Fire-Tested Preferred

Non Fire-Tested

Preferred

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A31D Valve

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Table 4. Valve Weights

SIZE CL150 CL300

NPS kg lb kg lb

3 15 33 28 63
4 25 56 35 77
6 34 76 65 143

8 54 118 156 343
10 81 178 176 388
12 110 243 294 649
14 152 335 345 760
16 201 443 563 1240
18 243 535 591 1303
20 277 611 706 1556

24 434 956 1307 2881

An A31D valve is normally shipped as part of an assembly with an actuator and other accessories such as a valve
positioner. If the valve and actuator have been purchased separately or if the actuator has been removed for
maintenance, properly mount the actuator and adjust valve/actuator travel and all travel stops before inserting the
valve into the line.

CAUTION

Damage to the disk will occur if any pipe flanges or piping connected to the valve interfere with the disk rotation path. Be
certain to align the valve accurately to avoid contact between the disk (key 2) and the flanges.

Adjusting the Actuator Travel Stops or Travel

Key number locations are shown in figure 9, 10, or 11, unless otherwise noted.

1. Refer to the actuator instruction manual to locate the actuator travel stop that controls the closed position of the
valve disk (key 2). When adjusting the travel stop or travel, make sure that the disk is from 0.25 to 0.76 mm (0.010
to0.030inch)awayfromtheinternalstopinthevalvebody(seefigure5).Thisadjustmentisnecessarytobe
certain that the actuator output torque is fully absorbed by the actuator travel stop or by the actuator. The internal
travel stop in the valve body should not absorb any of the actuator torque.

CAUTION

When using an actuator, the actuator travel stop (or actuator travel, for actuators without adjustable stops) must be
adjusted so the disk stop in the valve does not absorb the output of the actuator. Failure to limit the actuator travel as
described in the Adjusting the Actuator Travel Stops or Travel steps can result in damage to the valve, shaft(s), or other
valve components.

2. Before installing the valve/actuator assembly in the process line, cycle the valve several times to be sure the valve
disk returns to the proper position.

Installing the Valve

The maximum allowable inlet pressures for A31D valves are consistent with the applicable ASME
pressure/temperature ratings except where limited by the material capabilities.

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Instruction Manual

D500248X012

Refer to table 2 for the quantity and size of line bolting required to install the valve in the pipeline.

CAUTION

To avoid damage to the valve disk during installation, the valve must be in the fully closed position. If the A31D valve is
equipped with a fail-open actuator, remove the actuator before installing the valve/actuator assembly or cycle the valve
into the fully closed position. Then, take appropriate steps to be sure that the actuator does not cause the valve to open
during installation.

Figure 3. Properly Installed Valve

GE62595-A

1. Seefigure3forrecommendedvalveorientation.

2. Position the valv e between the flanges. Be sure to leave enough room for the flange gaskets. Install the lower flange
bolts.

3. Select the appropriate gaskets for the application. Flat sheet, spiral wound, or other gasket types, made to the
ASME B16.5 standard or user's standard, can be used on A31D valves depending on the service conditions of the
application.

4. Install the remaining flange bolts.

5. Tighten the flange bolts in an alternating criss-cross fashion to a torque value of one-fourth of the final bolting
torque. Repeat this procedure several times, increasing thetorquevalueeachtimebyafourthofthefinaldesired
torque. After applying the final torque value, tighten each flange bolt again to allow for gasket compression.

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 readjustmentto meet specific service conditions. Check with your process of safety engineer for any
additional measures that must be taken to protect against process media.

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.

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Figure 4. Optional Shaft-to-Valve Body Bonding Strap Assembly

ACTUATOR

A

A

37A6528-A
A3143-2

VALVE BODY

VIEW A-A

A31D Valve

April 2014

CAUTION

For non-ENVIRO-SEAL packing: Tighten the packing follower nuts only enough to prevent shaft leakage. Excessive
tightening will accelerate wear of the packing and could produce higher friction loads on the valve stem.

2. ENVIRO-SEAL Packing Systems: will not require this initial re-adjustment. Refer to the separate instruction manual,
Fisher ENVIRO-SEAL Packing System for Rotary Valves (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 atmosphere.

WARNING

The valve shaft is not necessarily grounded when installed in a pipeline unless the shaft is electrically bonded to the valve.

To avoid personal injury or property damage resulting from the effects of a static electricity discharge from valve
components in a hazardous atmosphere or where the process fluid is combustible, electrically bond the drive shaft (key 3)
to the valve accordingto the following step.

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A31D Valve

April 2014

Note

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. Alternate shaft-to-valve body bonding is available for
hazardous service areas where the standard packing is not sufficient to electrically bond the shaft to the valve (see the following
step).

Instruction Manual

D500248X012

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

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.

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.

Key numbers in this procedure are shown in figure 9, 10, or 11 unless otherwise indicated.

WARNING

The valve closes with a shearing action. To avoid personal injury, keep hands, tools, and other objects away from the valve
while its being stroked.

Avoid personal injury from sudden release of process pressure. 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

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

D Vent the power actuator loading pressure.
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 plug.

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

media.

Removing and Replacing the Actuator

Refer to the appropriate actuator instruction manual for actuator removal and replacement procedures. The actuator
stops or travel stops must limit the rotation of the valve shaft. See the CAUTION below.

CAUTION

When using an actuator, the actuator travel stop (or actuator travel stop, for actuators without adjustable stops) must be
adjusted so the disk stop in the valve does not absorb the output of the actuator. Failure to limit the actuator travel can
result in damage to the valve, shaft(s), or other valve components.

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A31D Valve

April 2014

Packing Maintenance

TheA31Dvalveisdesignedsothepackingcanbereplacedwithoutremovingthevalvefromtheprocesspipeline.

CAUTION

For non-ENVIRO-SEAL packing: Tighten the packing follower nuts only enough to prevent shaft leakage. Excessive
tightening will accelerate wear of the packing and could produce higher friction loads on the valve stem.

Usually, packing leakage can be eliminated by merely tightening the hex nuts (key 15) located above the packing
follower (key 12) while the valve is in the pipeline. However, if leakage continues, the packing must be replaced.

For PTFE ENVIRO-SEAL packing system, refer to instruction manual, Fisher ENVIRO-SEAL Packing System for Rotary
Valves (D101643X012) (see figure 8).

CAUTION

Never use a wrench or pliers on the drive shaft (key 3). A damaged shaft could cut the packing and allow leakage.

1. Before loosening any parts on the valve, release the pressure from the pipeline. Then, remove the hex nuts (key 15)
and lift off the packing follower (key 12).

2. Remove the hex jam nuts (key 17) and the anti-blowout flange (key 10). Remove the packing follower (key 12).
Refer to figure 6 for details of the anti-blowout protection parts.

The packing is now accessible.

3. Use a packing extractor to remove packing. Insert the corkscrew-like end of the tool into the first piece of packing
and pull firmly to remove the packing. Repeat this process until all packing parts have been removed.

CAUTION

Be careful when cleaning the packing box. Scratches to the drive shaft (key 3) or inside diameter of the packing bore might
cause leakage.

4. Before installing new packing, clean the packing box.

5. Install new packing one ring at a time, using the packing follower as a driver. If using split-ring packing, stagger the
splitsintheringstoavoidcreatingaleakpath.

6. Reinstall the packing parts. Refer to figure8forthesequenceofpackingparts.

Removing the Valve

1. Disconnect any operating lines providing air pressure, electric power, or a control signal to the actuator. Be sure the
actuator cannot suddenly open the valve. Vent the power actuator loading pressure.

2. Use bypass valves or completely shut off the process to isolate the valve from process pressure. Relieve process
pressure on both sides of the valve. Drain t he process media from either side of the valve.

11