Data Sheet

ManualsBrandsEmerson ManualsControl ValvesEmerson Fisher POSI-SEAL A41

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Fisherr A41 High-Performance Butterfly Valve

The Fisher A41 valve features an eccentrically

mounted disc with a soft or stainless steel seal ring.

Soft seals provide excellent sealing capabilities in both

flow directions. The metal seal ring provides excellent

shutoff against pressure applied in the recommended

flow direction for both liquid and gas applications. The

NOVEX and Phoenix III metal seals are available for

demanding applications requiring excellent shutoff

capabilities. The double D shaft combines with a

variety of power and manual actuators to form a

reliable, high-performance valve suitable for many

power applications requiring tight shutoff.

Unless otherwise noted, all NACE references are to

NACE MR0175-2002.

Features

 Exceptional Shutoff–Bidirectionalsoftsealring(see

figure 2) with pressure-assisting action results in

exceptional shutoff rates as shown in the

specifications.

 Shaft Retention–Redundant shaft retention

provides added protection. The packing follower

and shaft step interact to hold the shaft securely in

the valve body (see figure 1).

 Easy Installation–The valve body self-centers on the

line flange bolts as a fast, accurate means of

centering the valve in the pipeline.

 Sour Service Capability–Materials are available for

applications handling sour fluids and gases. These

materials comply with the requirements of NACE

MR0175-2002.

W9269

Fisher A41 Valve

 Improved Environmental Capabilities–The optional

ENVIRO-SEALt packing system is designed with

improved sealing, guiding, and loading force

transmission. The ENVIRO-SEAL packing s ystem can

control emissions to below the EPA (Environmental

Protection Agency) limit of 100 ppm (parts per

million) for valves.

 Low Cost Maintenance–Individual disc/shaft

components can be replaced after disassembly due

to sleeve and taper pin connections (see figure 1).

A41 Valve

D500212X012

Product Bulletin

21.1:A41

January 2013

Summary of content (12 pages)

PAGE 1
Product Bulletin A41 Valve 21.1:A41 January 2013 D500212X012 Fisherr A41 High-Performance Butterfly Valve The Fisher A41 valve features an eccentrically mounted disc with a soft or stainless steel seal ring. Soft seals provide excellent sealing capabilities in both flow directions. The metal seal ring provides excellent shutoff against pressure applied in the recommended flow direction for both liquid and gas applications.
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Product Bulletin A41 Valve 21.
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Product Bulletin A41 Valve 21.1:A41 January 2013 D500212X012 Specifications (continued) Approximate Weights See table 1 Mating Flange Capabilities All sizes compatible with appropriate CL150 or 300, and NPS 2 also compatible with CL600, flanges (schedule 80 or lighter, see figure 6, dimension M) ENVIRO-SEAL Packing This optional PTFE or graphite packing system provides improved sealing, guiding, and transmission of loading force to control liquid and gas emissions (see figure 5). See Bulletin 59.
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Product Bulletin A41 Valve 21.1:A41 January 2013 D500212X012 Figure 1.
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Product Bulletin A41 Valve 21.1:A41 January 2013 D500212X012 Figure 2.
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Product Bulletin A41 Valve 21.1:A41 January 2013 D500212X012 Table 2. Flow Coefficients(1) Cv FORWARD FLOW WITH DISC WIDE OPEN (90 DEGREES ROTATION) VALVE SIZE, NPS 2 3 4 6 8 10 12 CL150 CL300 80.2 286 499 1250 2180 3600 5400 80.2 237 488 1110 2070 3480 5130 1. Refer to Fisher Catalog 12 for a complete listing of flow coefficients. Table 3.
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Product Bulletin A41 Valve 21.1:A41 January 2013 D500212X012 Figure 4. Flow Direction RETAINER RING SIDE RETAINER RING SIDE MFG LABEL MFG LABEL FLOW ARROW ARROW SHOWS PREFERRED FLOW DIRECTION FOR SOFT SEALS AND NPS 2 METAL SEAL FORWARD FLOW FLOW ARROW ARROW SHOWS FLOW DIRECTION FOR NOVEX METAL SEAL, AND PREFERRED FLOW DIRECTION FOR PHOENIX METAL SEAL REVERSE FLOW REVERSE FLOW FORWARD FLOW 75B1181-A A6881-2 FACE SIDE OF DISC Note: 1.
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Product Bulletin 21.1:A41 January 2013 Installation It is recommended that the valve drive shaft be mounted in a horizontal position. Operating conditions may require specific valve/actuator fail action, styles, positions and flow direction. Valves with NOVEX seal rings require mounting in the reverse flow direction. Refer to figure 4. Large valve/actuator assemblies may require additional support because of the combined weight.
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Product Bulletin A41 Valve 21.1:A41 January 2013 D500212X012 Figure 5.
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Product Bulletin A41 Valve 21.1:A41 January 2013 D500212X012 Figure 6.
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Product Bulletin A41 Valve 21.1:A41 January 2013 D500212X012 Table 4. CL150 Valve Dimensions G R Valve Size, NPS A E Wafer Style Single Flange K M(2) Wafer Style 2 45 83 102 --- 102 --- 103 --- 3 48 83 70 79 121 73 133 189 12.7 4 54 83 86 102 124 97 171 219 6 57 83 121 129 152 146 219 273 8 64 83 155 157 181 191 272 10 71 89 186 198 229 238 12 81 89 222 230 254 284 Y Flat Size Flat Length T U 9.50 25.4 79 --- 9.50 25.
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Product Bulletin 21.1:A41 January 2013 A41 Valve D500212X012 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 and ENVIRO-SEAL are marks owned by one of the companies in the Emerson Process Management business unit of Emerson Electric Co.