Data Sheet

A31D Valve
D500213X012
Product Bulletin
21.1:A31D
September 2014
3
A31D Valve Specifications and Materials of Construction
Table 1. Fisher A31D Valve Specifications
SPECIFICATION
Valve Body Size NPS 3, 4, 6, 8, 10, 12, 14, 16, 18, 20, and 24
Pressure Rating Consistent with CL150 and 300 per ASME B16.34
(1)
Valve Body Materials
WCC Steel
CF8M Stainless Steel
Disk Materials CF8M Stainless Steel
End Connections Mates with RF flanges per ASME B16.5
Valve Body Style Double Flange
Shaft Connection
Spline (standard)
Keyed (optional)
Face-to-Face Dimensions
CL150: ISO 5752 Butterfly Valve Short Series
CL300: ISO 5752 Butterfly Valve Long Series
Shutoff
Soft Seal: Bidirectional ANSI/FCI 70-2 Class VI
NOVEX Seal: Unidirectional MSS SP-61
(2)
Phoenix III Seal: ANSI/FCI 70-2 Class VI
Flow Direction Reverse (flow direction is into the shaft side of the disk)
Flow Characteristic Approximately Linear
Disk Rotation Clockwise (CW) to close
1, See table 4 and figure 4 for additional information. The pressure/temperature limits in this bulletin and any applicable codes or standard limitation should not be exceeded.
2. 0.1 scfh per unit of NPS at 80 psi.