Data Sheet

ManualsBrandsEmerson ManualsControl ValvesEmerson Fisher POSI-SEAL A31A

www.Fisher.com

Fisherr POSI-SEALt A31A

High-Performance Butterfly Valve

The Fisher A31A High Performance Butterfly Valve

provides outstanding performance under extreme

pressure and temperature conditions. The A31A valve

maintains tight shutoff and is available in a fire-tested

version.

The A31A valve is available as either a flangeless (wafer

style) design or as a single-flange (lugged) design. A

keyed drive shaft combines with a variety of

handlevers, handwheels, or pneumatic piston

diaphragm actuators to make the A31A a reliable,

high-performance butterfly valve for a variety of on-off

applications in the various process industries.

TheA31Avalvecanbesuppliedwithoneofseveral

dynamic seals (figure 1) that can be used in a variety of

demanding applications. With the appropriate seal

selection and materials of construction, the

pressure-assisted seal provides excellent shutoff

against the full ASME class pressure range for the

specific valve type.

Unless otherwise noted, all NACE references are to

NACE MR0175-2002.

W9134-2

FISHER A31A VALVE WITH BETTIS™ ACTUATOR AND

DVC6200 FIELDVUE™ DIGITAL VALVE CONTROLLER

A31A Valve

D500191X012

Product Bulletin

21.1:A31A

October 2013

Summary of content (12 pages)

PAGE 1
Product Bulletin A31A Valve 21.1:A31A October 2013 D500191X012 Fisherr POSI-SEALt A31A High-Performance Butterfly Valve The Fisher A31A High Performance Butterfly Valve provides outstanding performance under extreme pressure and temperature conditions. The A31A valve maintains tight shutoff and is available in a fire-tested version. The A31A valve is available as either a flangeless (wafer style) design or as a single-flange (lugged) design.
PAGE 2
Product Bulletin A31A Valve 21.1:A31A October 2013 D500191X012 Specifications Valve Sizes(1) NPS J 14, J 16, J 18, J 20, and J 24 Available Valve Configurations J Flangeless (wafer) style or J single-flange (lugged) control valve with a one-piece valve body, a two-component seal/backup O-ring, and a keyed drive shaft End Connection Style J Flangeless style or J single flange valve body designed to fit between raised-face mating flanges per ASME B16.
PAGE 3
Product Bulletin A31A Valve 21.1:A31A October 2013 D500191X012 Features        Economical Tight Shutoff–The pressure-assisted seal design provides tight shutoff and permits the use of smaller, less expensive actuators in applications requiring full ASME B16.34 shutoff capabilities. Excellent Shutoff Integrity–Concentric rotation helps to ensure that the valve disc remains in the closed position in spite of line pressure surges or actuator failure.
PAGE 4
Product Bulletin A31A Valve 21.1:A31A October 2013 D500191X012 Figure 2. Maximum Pressure/Temperature Ratings CL150 SOFT SEAL CL150 NOVEX SEAL CL300 SOFT SEAL CL300 NOVEX SEAL C0759-2 CL150 PHOENIX III SEAL NOTE: CL300 PHOENIX III SEAL 1 Do not throttle PTFE seals at differential pressures greater than 21 bar (300 psid) at disc angles less than 20_ open. Throttling pipe seals under such conditions may cause erosion and seal failure.
PAGE 5
Product Bulletin A31A Valve 21.1:A31A October 2013 D500191X012 Figure 3. Blowout Protection HEX NUT STUD PACKING FLANGE SHAFT LUBRICANT SPRING PACK ASSEMBLY PACKING FLANGE HEX NUT ANTI-BLOWOUT FLANGE HEX NUT SHAFT SHOULDER STUD HEX NUT SHAFT SHOULDER ANTI-BLOWOUT FLANGE ANTI-EXTRUSION RING PACKING FOLLOWER PACKING SET PACKING BOX RING TYPICAL PTFE V-RING PACKING A7090 STANDARD PACKING ARRANGEMENT ENVIRO-SEAL ARRANGEMENT (PTFE SHOWN) Figure 4.
PAGE 6
Product Bulletin A31A Valve 21.1:A31A October 2013 D500191X012 Table 1.
PAGE 7
Product Bulletin A31A Valve 21.1:A31A October 2013 D500191X012 Table 2. Dimensions and Weights, Wafer Style Valves, CL150 S (Shaft Dia at Keyway) Key SQ Size T U W Y 422 470 533 30.2 31.8 38.1 6.35 6.35 9.53 235 235 273 46.0 46.0 50.8 17.5 17.5 20.6 --28.4 31.8 72 94 139 464 581 584 692 44.5 57.2 9.53 12.7 273 337 50.8 76.2 20.6 23.9 31.8 35.1 167 255 12.88 14.62 15.75 13.04 14.77 16.49 16.62 18.50 21.00 1-3/16 1-1/4 1-1/2 0.25 0.25 0.375 9.25 9.25 10.75 1.81 1.81 2.00 0.
PAGE 8
Product Bulletin A31A Valve 21.1:A31A October 2013 D500191X012 Table 3. Dimensions and Weights, Single Flange Valves, CL150 Valve Size, NPS A(1) D E G K M(2) Min. I.D. R 14 16 18 91.9 102 114 146 146 229 63.5 63.5 79.50 295 318 349 327 371 400 331 375 419 531 607 645 20 24 127 154 229 254 79.50 104.9 381 438 432 492 464 581 696 822 14 16 18 3.62 4.00 4.50 5.75 5.75 9.00 2.5 2.5 3.13 11.62 12.50 13.75 12.88 14.62 15.75 13.04 14.77 16.49 20.88 23.88 25.38 20 24 5.00 6.
PAGE 9
A31A Valve D500191X012 Installation Recommended installation for the A31A valve is with the shaft upstream of the seal (retaining ring downstream from the high pressure side of the valve). The standard soft seal offers bubble-tight, bidirectional shutoff. To meet the performance requirements of many of today's fire-tested requirements, a Phoenix III valve must be installed in the preferred valve orientation. The NOVEX seals are uni-directional and should be installed with the shaft upstream of the seal.
PAGE 10
Product Bulletin A31A Valve 21.1:A31A October 2013 D500191X012 Table 4. Dimensions and Weights, Wafer Style Valves, CL300 Valve Size, NPS A(1) D E G K M(2) Min. I.D. R 14 16 18 117 133 149 229 229 254 79.50 79.50 104.9 319 353 384 364 397 419 304 346 389 437 498 556 20 24 159 181 273 273 124.0 124.0 416 483 483 546 442 523 605 716 14 16 18 4.62 5.25 5.88 9.00 9.00 10.00 3.13 3.13 4.13 12.56 13.88 15.12 14.31 15.62 16.50 11.98 13.63 15.32 17.19 19.62 21.88 20 24 6.25 7.
PAGE 11
Product Bulletin A31A Valve 21.1:A31A October 2013 D500191X012 Table 5. Dimensions and Weights, Single Flange Valves, CL300 Valve Size, NPS A(1) D E G K M(2) Min. I.D. R 14 16 18 117 133 149 229 229 254 79.50 79.50 104.9 319 353 384 364 397 419 304 346 389 594 657 721 20 24 159 181 273 273 124.0 124.0 416 483 483 546 442 523 784 924 14 16 18 4.62 5.25 5.88 9.00 9.00 10.00 3.13 3.13 4.13 12.56 13.88 15.12 14.31 15.62 16.50 11.98 13.63 15.32 23.38 25.88 28.38 20 24 6.25 7.
PAGE 12
Product Bulletin 21.1:A31A October 2013 A31A Valve D500191X012 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 remains solely with the purchaser and end user. Fisher, POSI-SEAL, Bettis, FIELDVUE, and ENVIRO-SEAL are marks owned by one of the companies in the Emerson Process Management business unit of Emerson Electric Co.