Emerson Fisher POSI-SEAL A41 Data Sheet
Product Bulletin
A41 Valve
D500212X012
21.1:A41
January 2013
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.
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 system 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).
Sour Service Capability–Materials are available for
applications handling sour fluids and gases. These
materials comply with the requirements of NACE
MR0175-2002.
www.Fisher.com
Product Bulletin
21.1:A41
January 2013
Specifications
A41 Valve
D500212X012
Valve Sizes and End Connection Styles
NPS
J 2, J 3, J 4, J 6, J 8, J 10, and J 12 valve
sizes available in
J wafer or J single-flanged style
(NPS 2 only in wafer style)
Maximum Inlet Pressures
(1)
Carbon Steel and Stainless Steel Valve Bodies:
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
(1)
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 3)
Shutoff Classifications
J PTFE, Reinforced PTFE, and UHMWPE Seal:
(4)
No
visible leakage for this bidirectional seal per MSS
SP-61. See figure 4
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
psigforwardand100psigreverse
J NOVEX Seal: For NPS 3 through 12. Unidirectional
shutoff is MSS SP-61 in the preferred flow direction.
Seefigure4
J Phoenix III Seal: For NPS 3 through 12. No visible
leakage for this bidirectional seal per MSS SP-61. See
figure 4. For optional Phoenix III Fire-Tested seal
(3)
consult your Emerson Process Management sales
office
NOVEX Seal: -46 to 538_C(-50to1000_F)
Phoenix III: -46 to 232_C (-50 to 450_F)
See table 3 for component temperature ranges
Construction Materials
Refer to table 3 for standard and optional material
selections
Flow Characteristic
Approximately linear
Flow Direction
Refer to figure 4
Flow Coefficients
See table 2, and Fisher Catalog 12
Noise Levels
See Catalog 12 for sound pressure level prediction
Disc Rotation
Clockwise to close (when viewing from the drive shaft
end) through 90 degrees of disc rotation
Available Actuators
J Pneumatic piston, J manual handwheel or
J handlever (handlevers are available for CL150 up to
anNPS8valve,andforCL300uptoanNPS6valve)
Actuator/Valve Action
,
With a pneumatic actuator, the valve action is
reversible. Refer to the information provided in the
Installation section and figure 4
Material Temperature Capabilities
(1)
PTFE and Reinforced PTFE Seals: -46 to 232_C(-50to
450_F)
UHMWPE Seal:
(4)
-18 to 93_C (0 to 200_F)
NPS 2 Metal Seal: -46 to 538_C(-50 to 1000_F)
2
Valve Classification
Face-to-face dimensions of NPS 3 through 12 in
CL150 or 300, and meets API 609 or MSS SP-68
standards for face-to-face dimensions of wafer style
and single-flange valves (see figure 6)
(continued)
A41 Valve
D500212X012
Specifications (continued)
Product Bulletin
21.1:A41
January 2013
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)
Approximate Weights
See table 1
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
Shaft Diameters
(see figure 5). See Bulletin 59.3:041 ENVIRO-SEAL
Packing Systems for Rotary Valves for more
Seefigure6
1. The pressure/temperaturelimits in this bulletin and any applicable standard or code limitation for valve should not be exceeded.
2. Optional ClassV shutoff isavailable by contactingyour Emerson Process Management sales office.
3. For component selection and applicable fire-tested standards and codes,consult your Emerson Process Managementsales office (see table2).
4. UHMWPE stands for ultra high molecular weightpolyethylene.
information
Table 1. Valve Weights
VALVE SIZE, NPS
2 4 4 --- ---
3 5 6 6 11
4 9 10 11 18
6 13 15 16 27
8 21 24 27 42
10 34 44 40 78
12 49 64 62 131
(1)
2
3 10 13 14 25
4 19 23 24 39
6 29 33 35 59
8 47 53 59 93
10 75 96 88 172
12 107 141 137 288
1. Weight of the CL600 NPS 2 valve is the same as the CL150 and CL300 values.
CL150 CL300 CL150 CL300
9.5 9.5 --- ---
WAFER STYLE SINGLE-FLANGE
Kilograms
Pounds
3
Product Bulletin
21.1:A41
January 2013
Figure 1. Typical Valve Construction
RETAINER RING
SCREWS
A41 Valve
D500212X012
W6236
RETAINER RING
(PRESSED-IN)
NOVEX SEAL RING
SINGLE-FLANGED STYLE
WAFER STYLE
PTFE V-RING PACKING
SHAFT
STEP
DOUBLE D SHAFT
4
W6237-1
TAPER PINS
AND HOLLOW PINS
PACKING FOLLOWER
PACKING
FLANGE
Loading...