Emerson Fisher POSI-SEAL A31A Instruction Manual
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Emerson Fisher POSI-SEAL A31A Instruction Manual

Emerson Fisher POSI-SEAL A31A Instruction Manual

High performance butterfly valve nps 3 through 12
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Instruction Manual
D500240X012
Fisher
POSI-SEAL
™
Butterfly Valve NPS 3 through 12
Contents
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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
www.Fisher.com
A31A High Performance
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Figure 1. Typical Fisher A31A Valve
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Emerson sales office
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before proceeding.
A31A Valve
February 2019
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Summary of Contents for Emerson Fisher POSI-SEAL A31A

  • Page 1: Table Of Contents

    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 sales office before proceeding. www.Fisher.com...

  • Page 2: Specifications

    (aluminum) Clockwise to close 1. For specific information about materials of construction, contact your nearest Emerson sales office. 2. The pressure/temperature limits in this manual, and any applicable code or standard limitation, should not be exceeded. Description The A31A high‐performance butterfly valve features a keyed drive shaft.

  • Page 3: Educational Services

    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 Automation Solutions Educational Services - Registration Phone: 1-641-754-3771 or 1-800-338-8158 E-mail: education@emerson.com emerson.com/fishervalvetraining...
  • Page 4 1. These low temperature limits apply to the flowing media. Valve extensions provided for cryogenic service maintain higher temperatures at the packing box. 2. Shaft material may affect the valve pressure rating. Consult your Emerson sales office. 3. PEEK stands for PolyEtherEtherKetone 4. CoCr‐A hardfacing degrades shutoff performance of the seal. Consult your Emerson sales office.

  • Page 5: Valve Orientation

    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 sales office.

  • Page 6: Preparing For Installation

    Instruction Manual A31A Valve February 2019 D500240X012 Table 4. Valve Body Data, CL300 SHAFT DIAMETER FACE‐TO‐FACE MINIMUM APPROXIMATE WEIGHT, VALVE SIZE, .(2) AT YOKE BEARING DIMENSION KILOGRAMS Wafer Single Flange 14.3 47.6 71.6 17.5 54.0 93.7 23.8 58.7 147.3 31.8 73.0 186.2 41.3...
  • Page 7 Instruction Manual A31A Valve D500240X012 February 2019 Figure 2. Maximum Pressure/Temperature Ratings OPERATING TEMPERATURE, _C OPERATING TEMPERATURE, _C OPERATING TEMPERATURE, _F OPERATING TEMPERATURE, _F CL150, SOFT SEAL CL300, SOFT SEAL OPERATING TEMPERATURE, _C S31600 SST OPERATING TEMPERATURE, _F CL150, NOVEX SEAL OPERATING TEMPERATURE, _C S21800 S31600 SST...
  • Page 8 Instruction Manual A31A Valve February 2019 D500240X012 Figure 2. Maximum Pressure/Temperature Ratings (continued) OPERATING TEMPERATURE, _C OPERATING TEMPERATURE, _F CL150, PHOENIX III SEAL OPERATING TEMPERATURE, _C OPERATING TEMPERATURE, _F CL300, PHOENIX III SEAL OPERATING TEMPERATURE, _C OPERATING TEMPERATURE, _C CTFE CTFE S21800 S21800...

  • Page 9: Installing Wafer-Style Valves

    Instruction Manual A31A Valve D500240X012 February 2019 Figure 3. Available Seal Configurations BACKUP BODY BODY RING GRAPHITE GASKET SEAL RING RETAINING T-SLOT RING RETAINING RING CRYOGENIC HIGH PRESSURE SEAL RING HIGH PRESSURE AT SHUTOFF AT SHUTOFF VALVE DISK VALVE DISK SOFT SEAL WITH CRYOGENIC SEAL BACKUP O-RING...
  • Page 10 Instruction Manual A31A Valve February 2019 D500240X012 Figure 4. Optional Shaft‐to‐Valve Body Bonding Strap Assembly ACTUATOR VALVE BODY 37A6528‐A A3143‐2 VIEW A‐A Table 5. Hex Head Screw, Stud Bolt and Cap Screw Data NUMBER SIZE DIA. INCH & THREAD LENGTH, INCH VALVE SIZE, NPS CL150 CL300...

  • Page 11: Installing Single-Flange Valves

    Gasket Retaining Bolts Note: These values are based upon standard materials, S66286/N07718 screws and ASTM A193GRB6 bolts. For other special fastener materials, please contact your Emerson sales office. Maintenance WARNING 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.

  • Page 12: Replacing Packing

    Instruction Manual A31A Valve February 2019 D500240X012 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 either side of the valve. D Vent the power actuator loading pressure and relieve any actuator spring precompression.

  • Page 13: Removing The Valve From The Pipeline

    Instruction Manual A31A Valve D500240X012 February 2019 1. Before loosening any parts, isolate the valve from the line pressure, release pressure from both sides of the valve body, and drain the process media from both sides of the valve. Then, remove the hex nuts (key 15) and lift off the packing flange (key 11).

  • Page 14: Removing/Installing The Seal Ring

    T‐slot area, retaining ring, and, if required, polish the disk thoroughly with fine steel wool or other appropriate material. PTFE Seal Installation Unless otherwise indicated, key numbers and part names are listed in figure 8. A maintenance kit with installation tools is available through your Emerson sales office.

  • Page 15: Novex Seal And Phoenix Iii Fire-Tested Seal Installation

    Unless otherwise indicated, key numbers and part names are listed in figure 8. A maintenance kit with installation tools is available through your Emerson sales office. 1. Locate the replacement seal ring (key 5) and note the shape of the ring. The ring is wider across one edge diameter and narrower across the other edge diameter.

  • Page 16: Cryogenic Seal Installation

    Instruction Manual A31A Valve February 2019 D500240X012 Figure 6. Typical Seal Installation LARGEST OUTSIDE DIAMETER (KEY 5) A5251‐1* WARNING Avoid personal injury or property damage caused by the impact of a falling or tipping valve. Support large valves during maintenance. 7.
  • Page 17 D500240X012 February 2019 A maintenance kit with installation tools is available through your Emerson sales office. 1. Locate the replacement seal ring (key 5) and note the shape of the ring. The ring is wider across one edge diameter and narrower across the other edge diameter. Also, note the wide groove around the outside circumference. If an aluminum backup ring is provided, fit this over the back of the seal ring (matching seal and backup ring angles) prior to installation in the valve.

  • Page 18: Anti-Blowout Protection, Packing, Valve Shaft(S), Disk, And Bearing Maintenance

    Instruction Manual A31A Valve February 2019 D500240X012 Figure 7. Anti‐Blowout Protection Detail PACKING FLANGE PACKING FLANGE STUD (KEY 14) (KEY 11) (KEY 11) AND HEX NUT PACKING (KEY 15) ANTI-BLOWOUT ANTI-BLOWOUT FOLLOWER RING (KEY 16) FLANGE HEX JAM NUT (KEY 12) ANTI-BLOWOUT (KEY 10) (KEY 17)
  • Page 19 Do not attempt to remove the bearing stop which is found in the drive shaft bearing bore immediately after the packing box. The bearing stop is pressed into the bearing bore. If the bearing stop needs replacement, contact your Emerson sales office for more information.

  • Page 20: Installing A One-Piece Shaft

    Instruction Manual A31A Valve February 2019 D500240X012 For valves with tangential pins and/or disk pins, locate the tangential pins (key 26) in the drive shaft (key 3) and the disk pin (key 26) in the follower shaft (key 4). a. If a maintenance kit is available, use the pin extractor to remove the disk pins. Select the correct size pin extractor tip with screws of proper thread size to match the thread size in the disk pins.

  • Page 21: Installing A Two-Piece Shaft

    Instruction Manual A31A Valve D500240X012 February 2019 3. Using caution to prevent damage to the bearing, insert one journal bearing (key 7) from the valve body bore into the drive shaft bearing bore until it hits the bearing stop (key 8). When properly installed, a portion of the journal bearing will extend into the valve body bore.
  • Page 22 Instruction Manual A31A Valve February 2019 D500240X012 3. Using caution to prevent damage to the bearings, insert the required number of journal bearings (key 7) from the valve body bore into the drive shaft bearing bore. When properly installed, one end of the journal bearing(s) will be flush with the interior end of the packing box, the other end of the journal bearing(s) will be flush with the valve body bore.

  • Page 23: Parts Ordering

    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 Automation Solutions 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.
  • Page 24 Responsibility for proper selection, use, and maintenance of any product remains solely with the purchaser and end user. Fisher, POSI-SEAL, and ENVIRO-SEAL are marks owned by one of the companies in the Emerson Automation Solutions business unit of Emerson Electric Co.

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