Emerson Fisher POSI-SEAL A31A Instruction Manual

Instruction Manual

D500240X012

A31A Valve

Fisherr POSI-SEAL™ A31A High Performance
Butterfly Valve NPS 3 through 12

October 2012

Contents

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

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

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

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

Educational Services 3.........................

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

Adjusting the Actuator Travel Stops or Travel 3.....

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

Preparing for Installation 6......................

Installing Wafer-Style Valves 9...................

Installing Single-Flange Valves 11................

Maintenance 11................................

Replacing Packing 12..........................

Removing the Valve from the Pipeline 13..........

Removing/Installing the Seal Ring 14.............

PTFE Seal Installation 14....................

NOVEX Seal and Phoenix III Fire-Tested

Seal Installation 15......................

Cryogenic Seal Installation 16................

Anti-Blowout Protection, Packing, Valve Shaft(s),

Disk, and Bearing Maintenance 18.............

Removal 18...............................

Installing a One-Piece Shaft 20...............

Installing a Two-Piece Shaft 21...............

Installing the Gasket Retainer 23.............

Figure 1. Typical Fisher A31A Valve

W5811-1

W5812-1

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

Parts List 23..................................

Introduction

Scope of Manual

This instruction manual provides installation, maintenance, and parts ordering information for the Fisher POSI-SEAL
A31A high-performance butterfly valves. Figure 1 shows typical A31A valves. For information regarding actuators and
accessories, refer to separate instruction manuals.

Do not install, operate, or maintain A31A 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.

www.Fisher.com

A31A Valve

October 2012

Table 1. Specifications

Instruction Manual

D500240X012

Available Valve Configurations

J Flangeless, wafer-style or J single-flange (lugged)
controlvalvewithaone-piecevalvebodyanda
two-component seal/backup O-ring, and a keyed
drive shaft

Valve Sizes

NPS J 3, J 4, J 6, J 8, J 10, J 12

Valve Classification

Face-to-face dimensions are in compliance with MSS
SP68 and API 609 standards; valve bodies are
designed for installation between ASME B16.5 CL150
or 300 raised-face flanges

Shutoff Classification. Per ANSI/FCI 70-2

Standard Soft Seal: Bidirectional bubble-tight shutoff
NOVEX Seal: Unidirectional shutoff Class V (reverse

flow direction only)

End Connection Style

J Flangeless, wafer-style or J single flange valve
body designed to fit between raised-face mating
flanges per ASME B16.5 CL150 or CL300

Maximum Inlet Pressure/Temperature

(4)

Consistent with ASME J CL150 and J CL300
pressure/temperature ratings per ASME B16.34. Also,
seefigure2foradditionalinformation.

Phoenix III Seal: Bidirectional bubble-tight shutoff
Phoenix III Seal for Fire-Tested Applications: Consult

your Emerson Process Management sales office for
fire tested performance

Cryogenic seal applications: Consult your Emerson
Process Management sales office

Installed Valve Orientation

See figure 3 for orientation guidelines for optimum
seal performance

Available Seal Configurations

J Standard soft seal ring (PTFE) with fluorocarbon or
EPR backup ring, J NOVEX seal ring, CL150,
(S31600, 316 SST)
standard pressure rating (S31600, 316 SST)

(1)

J NOVEX seal ring, CL300,

(1)

J NOVEX seal ring, CL300, high pressure rating
(S21800), J Phoenix III fire-tested seal ring (S31600,
316 SST) with resilient insert (PTFE) and backup ring
(fluorocarbon), or J cryogenic seal ring (CTFE) with
optional backup ring (aluminum)

1. For specific information about materialsof construction, contact your nearest Emerson Process Management sales office.

2. The pressure/temperaturelimits in this manual, and any applicable codeor standard limitation,should not be exceeded.

Valve In-Line Position

Shaft horizontal. See figure 5

Available Actuators

J Handlever, J handwheel,
J spring-and-diaphragm, or J pneumatic piston

Disk Rotation

Clockwise to close

Description

TheA31Ahigh-performancebutterflyvalvefeaturesakeyeddriveshaft.Thekeyedshaftcombineswithavarietyof
handlevers, handwheels, pneumatic piston or spring-and-diaphragm actuators to make the A31A a reliable,
high-performance, butterfly valve for a variety of applications in the various process industries.

The A31A is available in either a flangeless (wafer) or a single-flange (lugged) valve design, with a variety of seal, valve
body, and internal components. The A31A valve features a dynamic sealing design that is used in a variety of
demanding applications. With the appropriate seal configuration and materials of construction, the pressure-assisted
seal provides shutoff against the full ASME class pressure range for the specific valve type.

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Instruction Manual

D500240X012

A31A Valve

October 2012

Educational Services

For information on available courses for the Fisher POSI-SEAL A31 NPS 3 through 12 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]

st

Ave.

Installation

WARNING

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

To avoid personal injury or property damage resulting from the sudden release of pressure, do n ot install the valve
assembly where service conditions could exceed the limits given in this manual or on appropriate nameplates. Use
pressure-relieving devices as required by government or accepted industry codes and good engineering practices.

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.

CAUTION

The valve configuration and construction materials are selected to meet particular pressure, temperature, pressure drop,
and controlled fluid conditions. Because pressure drop and temperature range capabilities limit some combinations of
materials, do not apply any other conditions to the valve without first contacting your Emerson Process Management sales
office.

The maximum allowable inlet pressures for A31A valves are consistent with the applicable pressure/ temperature
ratings except where limited by material capabilities shown in figure 2 and table 2.

Adjusting the Actuator Travel Stops

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.

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A31A Valve

October 2012

Instruction Manual

D500240X012

CAUTION

When using an actuator, the actuator travel stops or the actuator travel (for actuators without adjustable stops) must be
adjusted so that the disk stop in the valve body does not absorb the output of the actuator. Failure to limit actuator travel
as described in the next step can result in damage to the valve shafts or other valve parts.

1. Locate the actuator travel stop that establishes the closed position of the valve disk. When adjusting the travel stop
or travel, make sure that the disk is from 0.001 to 0.030 inch (0.03 to 0.76 mm) away from the internal stop in the
valve body. This adjustment is necessary to be 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.

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.

Table 2. Material Temperature Ratings

COMPONENT, ASME CLASS, MATERIAL OF CONSTRUCTION

Seal Ring SeeFigure2

Backup Ring

Soft Seal Fluorocarbon

Phoenix III Seal Fluorocarbon

Cryogenic Seal Aluminum (Optional)

Graphite In Oxidizing Media

In Inert or Reducing Media

Electroless Nickel Plating or hard chrome coating

1. These low temperature limits apply to the flowing media. Valve extensions pro vided for cryogenic service maintain highertemperatures at the packing box.

2. Shaft material may affectthe valve pressure rating. Consultyour Emerson Process Management sales office.

3. PEEK stands for PolyEtherEtherKetone

4. CoCr-A hardfacing degrades shutoff performance of the seal. Consult your Emerson Process Management sales office.

EPR

Nitrile

PTFE

Chloroprene

EPR

Nitrile

Chloroprene

PTFE

(2)

N05500
N07718
S20910

(standard)

316 SST

Bronze

(4)

(Alloy 6)

(1)

Shaft Packing

Shaft

17-4PH H1025

17-4PH H1150M

Bearings

(3)

PEEK

PTFE Composition

Disk Hardfacing

CoCr-A

-20 to 400

-65 to 360

-20 to 200

-100 to 400

-45 to 300

-40 to 500

-80 to 400

-40 to 300

-65 to 300

-425 to 400

-425 to 450

-425 to 1000

-425 to 1500

-100 to 800

-320 to 800

-425 to 900

-425 to 1300

-320 to 1100

-100 to 500

-425 to 1500

-425 to 325

-425 to 500

-425 to 1000

-325 to 1500

TEMPERATURE RANGE

_F _C

-29 to 204

-54 to 182

-29 to 93

-73 to 204

-43 to 149

-40 to 260

-62 to 204

-40 to 149

-59 to 149

-254 to 204

-254 to 232

-254 to 538

-254 to 816

-73 to 427

-195 to 427

-254 to 482

-254 to 704

-196 to 593

-73 to 260

-254 to 816

-254 to 163

-196 to 260

-254 to 538

-198 to 816

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A31A Valve

October 2012

Valve Orientation

Note

The NPS 10 through 12 CL150 valves and NPS 8 through 12 CL300 valves have a two-piece shaft. The shaft with the keyed end is
called the drive shaft. The shaft opposite the drive shaft is called the follower s haft.

The NPS 3 through 8 CL150 valves and NPS 3 through 6 CL300 valves have a one-piece shaft. This one-piece shaft is keyed and is
called the drive shaft.

Whenever possible, install the valve with the shaft in the horizontal position as shown in figure 5.

Horizontal installation can enhance valve performance because process fluid flow will sweep entrained solids from valve surfaces,
preventing particle buildup on the seal. Also, installation of the valve with the shaft horizontal will extend bearing life because
entrained solids will be less likely to penetrate the bearings.

Table 3. Valve Body Data, CL150

VALVE SIZE,

NPS

3 14.3 47.6 71.6 8.6 9.5

4 17.5 54.0 93.7 13 15

6 23.8 57.2 147.3 20 22

8 23.8 63.5 195.6 28 30

10 28.5 71.4 254.0 33 43

12 31.8 81.0 298.7 48 64

VALVE SIZE,

NPS

3 9/16 1-7/8 2.82 19 21

4 11/16 2-1/8 3.69 28 32

6 15/16 2-1/4 5.80 45 49

8 15/16 2-1/2 7.70 61 67

10 1-1/8 2-13/16 10.00 73 95

12 1-1/4 3-3/16 11.76 105 141

1. Face-to-face dimensions are incompliance with MSS SP68 and API 609 specifications.

2. Minimum I.D. is theminimum pipe or flange I.D.required for disk swing clearance.

SHAFT DIAMETER

AT YOKE BEARING

SHAFT DIAMETER

AT YOKE BEARING

FACE-TO-FACE
DIMENSION

mm Wafer Single Flange

FACE-TO-FACE
DIMENSION

Inches Wafer Single Flange

(1)

(1)

MINIMUM

.(2)

I.D

MINIMUM

.(2)

I.D

APPROXIMATE WEIGHT,

KILOGRAMS

APPROXIMATE WEIGHT,

POUNDS

The A31A valve is designed for installation with the shaft(s) in any orientation around the pipeline: horizontal, vertical,
or at an intermediate angle. However, when installing the valve in certain services, follow the recommendations
below, which are based on application experience:

D In certain services (process fluids with high concentrations of entrained solids, abrasive slurries, polymerizing

media, or large diameter valves with high flow rates), installing the valve with the shaft horizontal to the pipeline
and downstream of the seal will enhance valve performance.

D Install a valve supplied for uni-directional shutoff with the high pressure side in the direction noted on the valve

body. A flow tag with an arrow is provided for proper installation.

If you have questions about proper valve orientation in a specific application, contact your Emerson Process
Management sales office.

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A31A Valve

October 2012

Table 4. Valve Body Data, CL300

VALVE SIZE,

NPS

3 14.3 47.6 71.6 9.1 10

4 17.5 54.0 93.7 13 14

6 23.8 58.7 147.3 20 25

8 31.8 73.0 186.2 30 41

10 41.3 84.1 231.1 61 75

12 47.6 92.1 281.7 78 107

VALVE SIZE,

NPS

3 9/16 1-7/8 2.82 20 23

4 11/16 2-1/8 3.69 28 31

6 15/16 2-5/16 5.80 44 54

8 1-1/4 2-7/8 7.33 67 91

10 1-5/8 3-5/16 9.10 134 166

12 1-7/8 3-5/8 11.09 171 235

1. Face-to-face dimensions are incompliance with MSS SP68 and API 609 specifications.

2. Minimum I.D. is theminimum pipe or flange I.D.required for disk swing clearance.

SHAFT DIAMETER

AT YOKE BEARING

SHAFT DIAMETER

AT YOKE BEARING

FACE-TO-FACE
DIMENSION

mm Wafer Single Flange

FACE-TO-FACE
DIMENSION

Inches Wafer Single Flange

Instruction Manual

D500240X012

(1)

(1)

MINIMUM

.(2)

I.D

MINIMUM

.(2)

I.D

APPROXIMATE WEIGHT,

KILOGRAMS

APPROXIMATE WEIGHT,

POUNDS

Preparing for Installation

CAUTION

To avoid damage to the valve disk during installation, the valve must be in the fully-closed position. If the A31A 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. The A31A 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.

Follow the instructions in this manual for adjusting travel stops. Also, refer to a separate actuator instruction manual
for detailed actuator mounting and adjustment procedures.

2. If not previously removed, remove the protective end coversfromthevalveandinspectthevalvebodytobecertain
that it is free of foreign material. Also, be certain that adjacent pipelines are free of any foreign material, such as
pipe scale or welding slag that could damage the valve seating surfaces.

CAUTION

TheA31Avalveisdesignedforusewiththeappropriatepiping schedule for the specified ASME class. Minimum inside
diameters for flanges or pipe mating with valves are shown in tables 3 and 4. Be certain to align the valve accurately to
avoid contact between the disk and the flanges. Improper alignment or insufficient space for disk rotation could result in
damage to the disk.

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

4. Refer to table 5 for the quantity and size of flange bolts required.

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Instruction Manual

D500240X012

Figure 2. Maximum Pressure/Temperature Ratings

A31A Valve

October 2012

OPERATING TEMPERATURE, _COPERATING TEMPERATURE,_C

OPERATING TEMPERATURE, _F

OPERATING TEMPERATURE, _F

CL300, SOFT SEALCL150, SOFT SEAL

OPERATING TEMPERATURE, _C

S31600 SST

OPERATINGTEMPERATURE,_F

CL150, NOVEX SEAL

OPERATING TEMPERATURE, _C

S21800

S31600 SST

B2335-2

OPERATING TEMPERATURE,_F

NOTE

1

BECAUSE OF POTENTIAL EROSIV E EFFECTSAND PREMATURE SEAL FAILURETHAT CAN OCCUR,THROTTLING PTFESEALS ATDIFFERENTIAL PRESSURES GREATERTHAN 300PSIDATDISCANGLES

LESS THAN 20 DEGREES OPEN IS NOT RECOMMENDED.

2

TEMPERATURE LIMITATIONS DO NOT ACCOUNT FOR THE ADDITIONAL LIMITATIONS IMPOSED BY THE BACKUP RING USED WITH THIS SEAL TO DETERMINE THE EFFECTIVE TEMPERATURE

LIMITATION OF THE APPROPRIATE SEAL/BACKUP RING COMBINATION, REFER TO TABLE 3.

CL300, NOVEX SEAL

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A31A Valve

October 2012

Figure 2. Maximum Pressure/Temperature Ratings (continued)

OPERATING TEMPERATURE, _C

OPERATING TEMPERATURE, _F

CL150, PHOENIX III SEAL

OPERATING TEMPERATURE, _C

Instruction Manual

D500240X012

OPERATING TEMPERATURE, _F

CL300, PHOENIX III SEAL

OPERATING TEMPERATURE, _C

CTFE

S21800

S21800

B2336-1

NOTE

2

TEMPERATURE LIMITATIONS DO NOT ACCOUNT FOR THE ADDITIONAL LIMITATIONS IMPOSED BY THE BACKUP RING USED WITH THIS SEAL TO DETERMINE THE EFFECTIVE TEMPERATURE

LIMITATION OF THE APPROPRIATE SEAL/BACKUP RING COMBINATION, REFER TO TABLE 3.

OPERATING TEMPERATURE, _F

CL150, CRYOGENIC SEAL

OPERATING TEMPERATURE, _C

CTFE

OPERATING TEMPERATURE, _F

CL300, CRYOGENIC SEAL

8