User Guide

Rotary Valve Selection Guide
Product Flier
PF51.3:010
October 2010
7
Fisher POSI-SEAL High-Performance Butterfly Valves (Continued)
A81 VALVE
A31A VALVE
W9461/IL
W9134/IL
Figure 7. Fisher POSI-SEAL High-Performance Butterfly Valves (Continued)
A81 A31A A31D
Applications
On/off service, rack-and-pinion actuator for
temperatures from -129 to 454C
On/off service, high-temperature and cryogenic
applications; -196 to 816C
On/off and throttling service, hightemperature
and cryogenic applications; 196 to 816C
Style
Wafer and single flange Wafer and single flange Double flange
Sizes
NPS 2, 3, 4, 6, 8, 10, 12 NPS 14, 16, 18, 20, 24 NPS 3, 4, 6, 8, 10, 12, 14, 16, 18, 20, 24
Ratings
PN 10 to 40
CL150 and CL300
CL150 and CL300 CL150 and CL300
End Connections
Raised-face (RF) Raised-face (RF) and ring-type joint (RTJ) Raised-face (RF) and ring-type joint (RTJ)
Valve Body Materials
EN: 1.0619 steel, 1.4409 stainless steel
ASME: SA216 WCC steel, SA351 CF3M
stainless steel
High-alloy materials are available
SA216 WCC steel or SA351 CF8M stainless
steel
High-alloy materials are available
SA216 WCC steel or SA351 CF8M stainless
steel
High-alloy materials are available
Disc Material
SA351 CF3M stainless steel SA351 CF8M stainless steel SA351 CF8M stainless steel
Seal Types (Material)
Soft (PTFE or UHMWPE) or metal (S31600) Soft (PTFE), NOVEX, and Phoenix III Soft (PTFE), NOVEX, and Phoenix III
Flow Characteristics and Maximum Flow Coefficients
Maximum Cv from 83.7 to 5080 Maximum Cv from 4550 to 21500
Rangeability
100 to 1
100 to 1 100 to 1
Shutoff Class
Soft Seal: SP-61
Metal Seal: SP-61
Soft Seal: Class VI
NOVEX Seal: SP-61
Phoenix III Seal: Class VI
Soft Seal: Bidirectional bubble-tight (Class VI or
better)
NOVEX Seal: Class V (standard); Class VI
(optional)
Phoenix III Seal: Class VI
Available Actuators (refer to page 12)
FieldQ Bettis Fisher 2052, 1051, 1052, 1061, and Bettis