Page 1
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
Page 2
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)
Page 3
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
Page 4
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
Page 5
A41 Valve
D500212X012
Product Bulletin
21.1:A41
January 2013
Figure 2. Available Seal Configurations
RETAINING
RING
PRESSUREASSISTED
SEAL
HIGH PRESSURE
SHUTOFF
DISC
FACE
B1558-3
GRAPHITE
GASKET
RETAINING
RING
A6301-1
NPS 2 METAL SEAL
HIGH
PRESSURE
SHUTOFF
UNIDIRECTIONAL SEAL
NOVEX METAL SEAL
VALVE BODY
VALVE
BODY
PRESSUREASSISTED
SEAL
SEAL RING
HUB SIDE
OF DISC
RETAINING
RING
SPRING
PRESSUREASSISTED
SEAL
HIGH
PRESSURE
SHUTOFF
DISC FACE
BIDIRECTIONAL S EAL
PTFE, REINFORCED PTFE, AND UHMWPE SEALS
RETAINING
RING
GRAPHITE
GASKET
BACKUP
O-RING
RESILIENT
INSERT
BIDIRECTIONAL SEAL
PHOENIX III METAL SEAL
VALVE
BODY
SEAL
RING
VALVE
BODY
SEAL RING
HUB SIDE
OF DISC
HIGH
PRESSURE
SHUTOFF
Figure 3. Maximum Pressure-Temperature Ratings
OPERATING TEMPERATURE,_C
PHOENIX III SEAL
WITH PTFE INSERT
PTFE AND
REINFORCED PTFE
UHMWPE
SEAL
A6306-2
Note:
Temperaturelimitationsdo not account for the additional limitations imposed by the backup ringused with this seal. To determine the effective temperature limitation of the appropriate
1
seal/backup ring combination,,refer to table 3.
OPERATING TEMPERATURE,_F
SEAL
5
Page 6
Product Bulletin
21.1:A41
January 2013
A41 Valve
D500212X012
Table 2. Flow Coefficients
VALVE SIZE,
NPS
2
3
4
6
8
10
12
1. Refer to Fisher Catalog 12 for a complete listing of flow coefficients.
(1)
CvFORWARD FLOW WITH DISC W IDE OPEN (90 DEGREES ROTATION)
CL150 CL300
80.2
286
499
1250
2180
3600
5400
80.2
237
488
1110
2070
3480
5130
Table 3. Construction Material Temperature Limits
COMPONENTS AND MATERIALS OF CONSTRUCTION
Valve Body Material
Carbon Steel
S31600
S31700
Disc Material
316
CG8M
Shaft Material
S20910
17-4PH
Bearing Material
PEEK / PTFE lined
Metal
Packing Material
PTFE V-rings
Graphite rings
Seal Ring
PTFE (Standard) -46 to232 -50 to450
Reinforced PTFE Soft Seal Ring -46 to232 -50 to450
UHMWPE Soft Seal Ring -18 to93 0 to200
NOVEX MetalSealRing -46 to538 -50 to1000
NPS2MetalSealring -46 to538 -50 to1000
Phoenix III MetalSealRing
Fluorocarbon backup ring -40 to232 -40 to450
Phoenix III Fire-Te sted
Fluorocarbon backup ring
(Specify metal bearings and graphite packing)
1. For component selection and applicable fire-tested standardsand codes, consult yourEmerson Process Management sales office.
(1)
MetalSealRing
TEMPERATURE LIMITS
_C _F
-29 to427
-198 to538
-198 to538
-198 to538
-198 to538
-198 to538
-62 to427
-73 to260
-198 to538
-46 to232
-198 to438
(1) (1)
-20 to800
-325 to1000
-325 to1000
-325 to1000
-325 to1000
-325 to1000
-80 to800
-100 to500
-325 to1000
-50 to450
-325 to1000
6
Page 7
A41 Valve
D500212X012
Figure 4. Flow Direction
Product Bulletin
21.1:A41
January 2013
RETAINER RING SIDE
MFG LABEL
FLOW ARROW
ARROW SHOWS PREFERRED FLOW DIRECTION FOR SOFT
SEALS AND NPS 2 METAL SEAL
FORWARD FLOW REVERSE FLOW
RETAINER RING SIDE
MFG LABEL
FLOW ARROW
ARROW SHOWS FLOW DIRECTION FOR NOVEX METAL SEAL,
ANDPREFERRED FLOW DIRECTION FORPHOENIX METAL SEAL
REVERSE
FLOW
FORWARD
FLOW
75B1181-A
A6881-2
Note:
1. By Emerson Process Management definition: Forward flow is into the face side of the disc. Reverse flow is into the hubside of the disc.
FACE SIDE OF DISC
7
Page 8
Product Bulletin
21.1:A41
January 2013
A41 Valve
D500212X012
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.
Fail Action: For actuators with spring returns, spring
fail action is available for: fail-to-open or fail-to-close
valveaction.Thevalveaction is field reversible.
For assistance in selecting the valve/actuator
mounting suited to your application, consult your
Emerson Process Management sales office.
Dimensions for wafer-style and single-flanged valves
are shown in figure 6.
8
Page 9
A41 Valve
D500212X012
Figure 5. Packing Arrangements
Product Bulletin
21.1:A41
January 2013
PACKING
FOLLOWER
PTFE V-RING PACKING
PACKING FLANGE
SPRING PACK
ASSEMBLY
ANTI-EXTRUSION
RING
PACKING SET
PACKING SET
PACKING RING
PACKING BOX
RING
STANDARD PACKING
ENVIRO-SEAL PTFE PACKING SYSTEM
1
GRAPHITE RIBBON PACKING
PACKING FLANGE
NUT
LUBRICANT
PACKING FLANGE
STUD
PACKING BOX
RING
PACKING FLANGE
SPRING PACK
ASSEMBLY
PACKING SET
C0785*A
Note:
Includes zinc washers for graphite ribbon packing only.
1
PACKING FLANGE
NUT
LUBRICANT
PACKING FLANGE
STUD
PACKING BOX
RING
ENVIRO-SEAL GRAPHITE PACKING SYSTEM
9
Page 10
Product Bulletin
21.1:A41
January 2013
Figure 6. Typical Valve Dimensions (also see tables 4 and 5)
A41 Valve
D500212X012
R
R
G
WAFER STYLE VALVE
G
K
K
E
E
Y-4 CLEARANCE
HOLES
S
FLAT
LENGTH
S
Y
G
R
K
E
S
SINGLE-FLANGE VALVE
A
FLAT SIZE
T
14B0818-D
14B0829-D
14B0830-D
B2437-2
18A3110-E
18A9075-C
A7082
NPS 12 CL300
W
WAFER-STYLE VALVE
U
TYPICAL VALVE MOUNTING
FLAT LENGTH
R
S
GKE
NPS 2 A41
WAFER STYLE VALVE
WTHD
F
T
A
10
Page 11
Product Bulletin
A41 Valve
D500212X012
Table4.CL150ValveDimensions
Valve
Size,
NPS
A E
2 45 83 102 --- 102 --- 103 --- 9.50 25.4 79 --3 48 83 70 79 121 73 133 189 12.7 9.50 25.4 83 19
4 54 83 86 102 124 97 171 219 15.9 11.07 25.4 83 19
6 57 83 121 129 152 146 219 273 19.1 14.25 25.4 95 25
8 64 83 155 157 181 191 272 333 25.4 17.45 25.4 95 25
10 71 89 186 198 229 238 330 406 31.8 20.60 25.4 133 38
12 81 89 222 230 254 284 387 476 38.1 25.37 38.1 133 38
2 1.78 3.25 4.00 --- 4.00 1.88 4.06 --- 1/2 0.374 1 3.12 --- 1/2-13 ---
3 1.88 3.25 2.75 3.12 4.00 2.88 5.25 7.44 1/2 0.374 1 3.25 0.75 3/8-16 5/8-11 4-holes
4 2.12 3.25 3.38 4.00 4.88 3.81 6.75 8.62 5/8 0.436 1 3.25 0.75 3/8-16 5/8-11 8-holes
6 2.25 3.25 4.75 5.06 6.00 5.75 8.62 10.75 3/4 0.561 1 3.75 1.00 1/2-13 3/4-10 8-holes
8 2.50 3.25 6.12 6.19 7.12 7.50 10.69 13.12 1 0.687 1 3.75 1.00 1/2-13 3/4-10 8-holes
10 2.81 3.50 7.31 7.81 9.00 9.38 13.00 16.00 1-1/4 0.811 1 5.25 1.50 5/8-11 7/8-912-holes
12 3.19 3.50 8.75 9.06 10.00 11.19 15.25 18.75 1-1/2 0.999 1.5 5.25 1.50 5/8-11 7/8-912-holes
1. This nominal valve shaft diameter is the shaft diameterthrough the packing box. Use this diameter when selecting Fisher actuators.
2. Disc chordal swing diameter at valve face. Please verify clearance with piping.
Wafer
Style
G
Flange
Single
(2)
K
M
Wafer
Style
R
Single
Flange
Inches
mm
Flat
Size
Flat
Length
T U W
See thread
information
below
(1)
S
21.1:A41
January 2013
Y
Single Flange
Only
---
See thread
information
below
Table5.CL300ValveDimensions
Valve
Size,
NPS
A E
2 45 83 102 --- 102 --- 103 --- 9.50 25.4 79 ---
3 48 83 89 95 119 73 132 206 15.7 11.07 25.4 83 19
4 54 83 114 121 146 97 162 238 19.0 14.25 25.4 95 25
6 59 83 146 152 178 145 221 308 25.4 17.45 25.4 95 25
8 73 89 175 183 210 188 276 375 31.8 20.60 25.4 133 38
10 83 89 232 229 243 233 330 438 38.1 25.37 38.1 133 38
12 92 89 308 308 279 278 389 508 44.4 28.55 38.1 146 38
2 1.78 3.25 4.00 --- 4.00 1.88 4.06 --- 1/2 0.374 1 3.12 --- 1/2-13 ---
3 1.88 3.25 3.50 3.75 4.69 2.88 5.19 8.12 5/8 0.436 1 3.25 0.75 3/8-16 3/4-10 8-holes
4 2.12 3.25 4.50 4.75 5.75 3.81 6.38 9.38 3/4 0.561 1 3.75 1.00 1/2-13 3/4-10 8-holes
6 2.31 3.25 5.75 6.00 7.00 5.69 8.69 12.12 1 0.687 1 3.75 1.00 1/2-13 3/4-10 12-holes
8 2.88 3.50 6.88 7.19 8.25 7.38 10.88 14.75 1-1/4 0.811 1 5.25 1.50 5/8-11 7/8-912-holes
10 3.25 3.50 9.12 9.00 9.56 9.19 13.00 17.25 1-1/2 0.999 1.5 5.25 1.50 5/8-11 1-816-holes
12 3.62 3.50 12.12 12.12 11.00 10.94 15.31 20.00 1-3/4 1.124 1.5 5.75 1.50 3/4-10 11/8-816-holes
1. This nominal valve shaft diameter is the shaft diameterthrough the packing box. Use this diameter when selecting Fisher actuators.
2. Disc chordal swing diameter at valve face. Please verify clearance with piping.
WaferS
tyle
G
Single
Flange
(2)
K
M
Wafer
Style
R
Flange
Single
Inches
mm
Flat
Size
Flat
Length
T U W
See thread
informationb
elow
(1)
S
Y
Single FlangeOnly
---
See thread
information below
11
Page 12
Product Bulletin
21.1:A41
January 2013
A41 Valve
D500212X012
Neither Emerson, Emerson Process Man agement, nor any of their affiliated entities assumes responsibility for the selection, use or maintenance
of anyproduct. Responsibility for proper selection, use, and maintenance of any product remains solely withthe purchaserand end user.
Fisher and ENVIRO-SEAL are marks owned by one of the companies in the Emerson Process Management business unitof EmersonElectric Co.Emerson
Process Management, Emerson, and the Emerson logo are trademarks and service marks of Emerson Electric Co. All other marks are the property of their
respective owners.
The contents of this publication are presented for informational purposes only, and while every effort has been made to ensure their accuracy, they arenot
to be construed as warranties or guarantees, express or implied, regarding the products or services described herein or their use or applicability. All sales are
governed by our terms and conditions, which are availableupon request. We reserve the right to modify or improve the designs or specificationsof such
products at any time without notice.
Emerson Process Management
Marshalltown, Iowa 50158 USA
Sorocaba, 18087 Brazil
Chatham, Kent ME4 4QZ UK
Dubai, United Arab Emirates
Singapore 128461 Singapore
www.Fisher.com
E 1991, 2013 Fisher Controls International LLC. All rightsreserved.
12
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