Specifications - Fisher A41 Instruction Manual

Table 1. Specifications
Valve Sizes and End Connection Styles
NPS J 2, J 3, J 4, J 6, J 8, J 10, and J 12 valves
in wafer or single flanged style (NPS 2 available in
wafer style only)
Maximum Inlet Pressures
Carbon Steel, Stainless Steel, and CN7M Valves:
Consistent with CL150 and 300 pressure-temperature
ratings per ASME B16.34, unless limited by material
temperature capabilities. NPS 2 is also consistent with
CL600
Maximum Pressure Drops
Consistent with CL150 and 300 pressure/
temperature ratings per ASME B16.34 except for
PTFE, UHMWPE, and Phoenix III seals that are derated
at some higher pressure/temperatures values. (See
figure 2)
Shutoff Classifications
J PTFE, Reinforced PTFE, and UHMWPE
visible leakage for this bidirectional seal per MSS
SP-61
J NPS 2 Metal Seal: Bidirectional shutoff. 0.001% of
maximum valve capacity (1/10) of Class IV per
ANSI/FCI 70-2 and IEC 60534-4. Pressure Drop is 740
psig forward and 100 psig reverse
J NOVEX Seal: Unidirectional shutoff is MSS SP-61 in
the preferred flow direction
J Phoenix III Seal: No visible leakage for this
bidirectional seal per MSS SP-61. For optional Phoenix
III Fire-Tested seal, consult your Emerson Process
Management sales office
1. The pressure/temperature limits in this manual and any applicable standard or code limitation for valve should not be exceeded.
2. UHMWPE stands for ultra high molecular weight polyethylene.
2
(1)
(1)
(2)
Seal: No
Flow Characteristic
Approximately linear
Flow Direction
See figure 4
Disc Rotation
Clockwise to close (when viewing the drive shaft end)
through 90 degrees of disc rotation (see figure 7)
Valve Classification
Face-to-face dimensions of NPS 3 through 12 in
CL150 or 300, and meets API 609 or MSS-SP68
standards for face-to-face dimensions of wafer-style
and single-flange valves
Actuator/Valve Action
With the diaphragm or piston actuators, the valve
action is field-reversible. Refer to information in the
Installation section and in figures 6 and 7.
Shaft Diameters
See table 2
Approximate Weights
See table 2
ENVIRO-SEAL Packing
This optional PTFE or graphite packing system
provides excellent sealing, guiding, and transmission
of loading force to control liquid and gas emissions
(see figure 6). See Bulletin 59.3:041 ENVIRO-SEAL
Packing System for Rotary Valves for more
information