Page 1
A81 Valve
D103301X012
Fisherr POSI-SEAL™ A81 Rotary Valve
The Fisher POSI-SEALA81rotaryvalvewithFieldQt
rack-and-pinion actuator offers automated on-off,
quarter-turn performance. It is available in
spring-return and double-acting piston designs.
The valve body meets PN 10 through PN 40, CL150,
and CL300 ratings. Face-to-face dimensions meet EN
558, API 609, and MSS-SP68 standards. Line centering
clips provide for versatility to mount and align the
same wafer style valve body in different piping
configurations (ASME and EN ratings).
The A81 rotary valve features an eccentricallymounted disk with either soft or metal seal, providing
capability for enhanced shutoff. The interchangeable
sealing technology allows for the same valve body to
accept both soft and metal seals.
Product Bulletin
21.1:A81
July 2012
The actuator sizing and selection process is improved
by simply reading a table for information.
A81 Features
Quarter-turn performance– The valve has a square
shaft-to-actuator connection and offers automated
on-off, quarter-turn performance.
Global Standards– The valve meets API, ASME, and
EN standards, making it suitable for use in all world
areas. An optional mounting bracket provides ISO
5211 actuator mounting capability.
PEEK/PTFE bearing as standard– The PTFE-lined
PEEK bearing is a low friction, low wear bearing. It
allows the valve to operate under high pressure
drops for a high cycle life while maintaining low
torque. The drop-in bearing design enables fast,
easy maintenance.
W9479
Improved shaft-disk pinning– The improved
expansion pin system ensures there is a positive,
durable connection between disk and shaft. This
reduces backlash and wear in the drive system,
optimizing long-term performance. It also makes
disassembly for maintenance quick and simple with
no need for special tools.
New Spring-Loaded Shaft– The spring in the
outboard shaft provides support to the drive train
and disk, enabling the shaft to be installed in both
horizontal and vertical orientations with no
detriment to performance or cycle life. This
complements the ability to mount the actuator on
the left- or right-hand side, enabling access for any
installation.
www.Fisher.com
Page 2
Product Bulletin
21.1:A81
July 2012
A81 Valve
D103301X012
Excellent Emissions Capabilities– The optional
ENVIRO-SEALt packing systems, are designed with
very smooth shaft surfaces and live-loading to
provide improved sealing, guiding, and loading
force transmission. The seal of the ENVIRO-SEAL
system can control emissions to below 100 ppm
(parts per million).
Sour Service Capability– Depending on material
selection, some trim and bolting materials are
available for applications involving sour liquids and
gases. These constructions comply with NACE
MR0175-2002, MR0103, and MR0175 / ISO 15156.
Contact your Emerson Process Management sales
office for more information.
Easy Installation– Line-centering clips engage the
line flange bolts to simplify installation and provide
for centering of wafer-style valves in the pipeline.
End connections are compatible with EN and ASME
standards.
Excellent Shutoff– Both the metal and soft seal
rings have pressure-assisting sealing action that
ensures tight shutoff regardless of pressure drop.
Long Seal Life– The opening and closing path of the
eccentric disk minimizes disk contact with the seal
ring, thereby reducing seal wear, undue friction,
and seating torque requirements. See
figure 2.
Reliable Flange Gasketing Surface– The seal
retainer screws and retention clips are outside the
gasket surface of the seal retainer. Spiral-wound or
flat-sheet gaskets can be installed between the
uninterrupted seal retainer face and the pipeline
flange.
Integral Shaft-to-Valve Body Bonding– Standard
valve construction includes conductive packing to
provide electrical bonding for hazardous area
applications.
Powder paint as standard– The Emerson Process
Managementt powder paint finish offers an
excellent corrosion-resistant finish to all steel parts.
High Temperature Capability– The valve will
operate at elevated temperatures, with the
appropriate trim components.
Shaft Retention– Redundant shaft retention
provides added protection. The packing follower,
anti-blowout ring, and shaft groove interact to hold
the shaft securely in the valve body (see figure 1).
Travel Indication– Additional travel indication can
be achieved by using the indication line on the
shaft, along with the disk position markings on the
packing follower (see figure 4).
Table of Contents
A81 Features 1.................................
A81 Valve Specifications and
Materials of Construction 3....................
2
FieldQ Actuator Features 16......................
Page 3
Product Bulletin
A81 Valve
D103301X012
A81 Valve Specifications and Materials of Construction
Table 1. Fisher A81 Valve Specifications
Specifications EN ASME
Valve Body Size DN 50, 80, 100, 150, 200, 250,and 300 NPS2,3,4,6,8,10,and12
Pressure Rating PN 10to 40 per EN 12516-1 CL150 / 300 per ASME B16.34
EN 1.0619 steel WCC steel
EN 1.4409 stainlesssteel CF3M (316L) stainless steel
Valve Body Materials
EN 1.4409 stainlesssteel CF3M stainless steel
Chrome-plated EN 1.4409 Stainless Steel Chrome-plated CF3M Stainless Steel
S31600 (316SST) seal ring - 0.1scfhperunitofNPS(NPS6valve=0.6scfh)perMSSSP-61
Seal
(4)
Seal
(3)
Disk Materials
Face-to-Face Dimensions Meets MSS SP68, API 609, and EN 558 standards
Flow Characteristic Approximately linear
Shaft Diameters and Approximate Weights See table 8
1. This material is not listed in EN 12516-1orASMEB16.34.Seefigure6forpressure/temperatureratings.
2. This material is not listed in EN 12516-1.Seefigure6forpressure/temperatureratings.
3. UHMWPE stands for ultrahigh molecular weight polyethylene.
4. RPTFE is a reinforcedPTFE seal.
5.LCCconstructionisstandardinwaferstyleonly.ConsultyourEmersonProcess Management sales office for single flange valve body style information.
PTFE or RPTFE
Metal or UHMWPE
End Connections Mates with raised-face flanges per EN 1092-1 Mates with raised-face flanges per ASME B16.5
Valve Body Style Wafer (flangeless) and single flange with tapped or through holes
Shutoff
Flow Coefficients See Fisher Catalog 12
Flow Direction Standard (forward flow) is with the seal retainer facingupstream; reverse flow is permissible for soft seals only
Disk Rotation Counterclockwiseto open (when viewed from actuator side of valve body) through 90 degrees of disk rotation
LCC LCC
(1)
CW2M
(2)
M35-2
CW2M CW2M
M35-2 M35-2
PTFE, RPTFE, or UHMWPE seal ring - No visible leakage per MSS SP-61
CW2M
M35-2
(1)
(5)
21.1:A81
July 2012
Table 2. Materials (Other Valve Components)
Component Material
Shafts and Pins S17400 (17-4 PH) stainless steel,S20910 (XM-19) stainless steel, N10276, N05500
Anti-blowout Ring N07718
Seal PTFE, RPTFE, or UHMWPEwith S31600 (316 stainless steel) or R30003 spring. Metalseal is 316 stainless steel with graphite gaskets
Bearings PEEK/PTFE, R30006 (Alloy 6), S31600 Nitride
Packing PTFE/carbon-filled PTFE (standard),graphite die-molded ribbon, ENVIRO-SEAL PTFE packing, ENVIRO-SEAL graphitepacking
Follower Spring N07718 with carbon-filled PEEK or S31600 spring seats
Bolting B8M Class2, B7M, N05500, N07718
Nuts 8M, 2HM,N04400, N10276
Table 3. Trim Combinations with Standard Construction Materials
Valve Body Material Shaft Material Disk Material Bearings Seal Material
1.4409 & CF3M PEEK/PTFE PTFE or RPTFE
1.0619 & WCC S17400 H1075
LCC S17400 H1075 1.4409 & CF3M PEEK/PTFE PTFE
1.4409 & CF3M S20910
CW2M N10276 CW2M PEEK/PTFE PTFE or RPTFE
M35-2 N05500 M35-2 PEEK/PTFE PTFE or RPTFE
1.4409 & CF3M Chrome-Plated
1.4409 & CF3M PEEK/PTFE PTFE or RPTFE
1.4409 & CF3M Chrome-Plated
PEEK/PTFE UHMWPE or Metal
Alloy 6or S31600 Nitride Metal
PEEK/PTFE UHMWPE or Metal
Alloy 6or S31600 Nitride Metal
3
Page 4
Product Bulletin
21.1:A81
July 2012
Figure 1. Typical Fisher A81 Valve Construction Detail
RETAINERCLIP (LINE
CENTERING CLIP)
A81 Valve
D103301X012
ANTI-BLOWOUT
RING
FOLLOWER
SHAFT
EXPANSION PIN
AND TAPER PIN
RETAINER
CLIP
SEAL
RETAINER
SEAL RING
RETAINER
CLIP
SEAL
RETAINER
SEAL RING
DISK
DRIVE SHAFT
BEARING
VALVE BODY
DISK
GE36289-A
4
SOFT SEAL
METAL SEAL
Page 5
A81 Valve
D103301X012
Figure 2. Comparison of Disk Action
SEAL RING (SOFT SEAL
CONSTRUCTION
SHOWN)
CONVENTIONAL
DISK PATH
OF ROTATION
ECCENTRIC
DISK PATH
OF ROTATION
ECCENTRIC
DISK CENTER
OF ROTATION
CENTERLINE OF
VALVE BODY
OPEN
CONVENTIONAL
DISK CENTER
OF ROTATION
CONVENTIONAL
DISK
Product Bulletin
21.1:A81
July 2012
ECCENTRIC
DISK
GE36289-A
DISK FULLY CLOSED DISK FULLY OPEN
Figure 3. Available Seal Configuration
SEAL
RETAINER
PRESSURE-ASSISTED
SEAL
HIGH
PRESSURE
SHUTOFF
DISK
FACE
B1558-3
METAL SEAL
VALVE BODY
SEAL
RETAINER
SPRING
PRESSUREASSISTED
SEAL
HIGH
PRESSURE
SHUTOFF
DISK FACE
VALVE BODY
VALVE
BODY
SEAL
RING
SOFT SEALS
5
Page 6
Product Bulletin
21.1:A81
July 2012
Figure 4. Travel Indication
A81 Valve
D103301X012
GE36289
Table 4. Material Temperature Capabilities
MATERIAL TEMPERATURE LIMITS
PN FLANGES
Valve Body Shaft Bearing Lining and Jacket Seal Packing _C _F
1.0619 Steel S17400 or S20910 PEEK / PTFE
R30006 (Alloy 6) or S31600 Nitride Metal Graphite —10 to 400
LCC S17400 or S20910 PEEK / PTFE PTFE PTFE —46 to 232 —50 to 450
1.4409
Stainless
Steel
CW2M N10276 PEEK / PTFE PTFE or RPTFE PTFE —10 to 232 14 to 450
M35-2 N05500 PEEK / PTFE PTFE or RPTFE PTFE —10 to 232 14 to 450
Valve Body Shaft Bearing Lining andJacket Seal Packing _C _F
WCC steel S17400 or S20910 PEEK / PTFE
LCC S17400 or S20910 PEEK / PTFE PTFE PTFE —46 to 232 —50 to 450
CF3M
Stainless
Steel
CW2M N10276 PEEK / PTFE PTFE or RPTFE PTFE —46 to 232 —50 to 450
M35-2 N05500 PEEK / PTFE PTFE or RPTFE PTFE —46 to 232 —50 to 450
1. For applications exceeding 316_C(600_F), consult your Emerson Process Management sales office for appropriate disk materialselection.
S20910 PEEK / PTFE
R30006 (Alloy 6) or S31600 Nitride Metal Graphite —46 to 500
R30006 (Alloy 6) or S31600 Nitride Metal Graphite —29 to 427
S20910 PEEK / PTFE
R30006 (Alloy 6) or S31600 Nitride Metal Graphite —46 to 454
PTFE or RPTFE PTFE or Graphite —10 to232 14 to 450
UHMWPE PTFE or Graphite —10 to 93 14 to 200
Metal
PTFE or RPTFE PTFE or Graphite —46 to232 —50 to 450
UHMWPE PTFE or Graphite —18 to 93 0 to 200
Metal
ASME FLANGES
PTFE or RPTFE PTFE or Graphite —29 to232 -20 to 450
UHMWPE PTFE or Graphite —18 to 93 0 to 200
Metal
PTFE or RPTFE PTFE or Graphite —46 to232 —50 to 450
UHMWPE PTFE or Graphite —18 to 93 0 to 200
Metal
PTFE —10 to232 14 to 450
Graphite —10 to 260 14 to 500
PTFE —46 to232 —50 to 450
Graphite —46 to 260 —50 to 500
PTFE —29 to232 -20 to 450
Graphite —29 to 260 -20 to 500
PTFE —46 to232 —50 to 450
Graphite —46 to 260 —50 to 500
(1)
(1)
(1)
(1)
—50 to932
—50 to850
14 to 752
-20 to800
(1)
(1)
(1)
(1)
6
Page 7
A81 Valve
D103301X012
Figure 5. Material Pressure/Temperature Curves
Product Bulletin
21.1:A81
July 2012
7
Page 8
Product Bulletin
21.1:A81
July 2012
Figure 6. Material Pressure/Temperature Curves
A81 Valve
D103301X012
1
2
1. CW2Mis not listed in EN 12516-1 or ASME B16.34. The PN and CL designations are used only toindicate relativepressure-retaining capabilities.
2. M35-2 is not listed in EN 12516-1. The PN designations are used only toindicate relative pressure-retaining capabilities.
8
Page 9
A81 Valve
D103301X012
Figure 7. Material Pressure/Temperature Curves
E1140
Product Bulletin
21.1:A81
July 2012
9
Page 10
Product Bulletin
21.1:A81
July 2012
Table 5. Maximum Allowable Shutoff Pressure Drops based on Trim (Seal, Shaft, and Bearings), Bar
Note: Donot exceed the EN or ASME pressure/temperature rating of the valve or mating flanges.
DN
TRIM TEMPERATURE, _C
-46 to 65
93
PTFE or RPTFE Seal
PEEK/PTFE Bearings
UHMWPE Seal
PEEK/PTFE Bearings
Metal Seal
Alloy 6 Bearings
Metal Seal
S31600/Nitride
Metal Seal
PEEK/PTFE Bearings
1. Pressure drops shown for metal seals arefor forward flow only.
(1)
(1)
Bearings
(1)
121
149
191
204
232
-17 to 37
66
93
-46 to 37
93
149
204
260
316
371
427
454
-46 to 37
93
149
204
260
316
371
427
454
-46 to 37
93
149
204
232
260
50 80 100 150 200 250 300
Bar
51.7
48.5
38.6
28.7
13.8
10.3
3.4
51.7
38.6
25.9
18.5
17.0
16.0
15.1
14.3
13.8
13.2
12.5
12.1
19.5
19.3
17.0
15.9
14.5
13.8
13.2
12.5
12.1
51.7
51.7
50.3
48.6
47.2
24.7
51.7
48.5
38.6
28.7
13.8
10.3
3.4
51.7
38.6
25.9
16.5
15.1
14.2
13.4
12.8
12.3
11.9
11.6
11.5
22.4
22.4
22.4
22.4
22.4
22.1
21.5
20.7
20.3
51.7
51.7
50.3
48.6
47.2
21.9
51.7
48.5
38.6
28.7
13.8
10.3
3.4
51.7
38.6
25.9
13.9
12.8
12.0
11.4
10.8
10.3
10.0
9.8
9.7
26.1
26.0
23.7
22.7
21.4
20.8
20.2
19.5
19.2
51.7
51.7
50.3
48.6
46.3
18.5
51.7
48.5
38.6
28.7
13.8
10.3
3.4
51.7
38.6
25.9
12.8
11.7
11.0
10.4
9.9
9.5
9.2
9.0
8.9
20.8
20.6
18.7
17.8
16.8
16.2
15.7
15.2
14.9
51.7
51.7
50.3
48.2
42.6
17.0
51.7
48.5
38.6
28.7
13.8
10.3
3.4
51.7
38.6
25.9
11.0
10.1
9.4
9.0
8.5
8.2
7.9
7.7
7.7
27.6
27.6
27.6
26.3
24.6
23.2
22.4
21.8
21.6
31.0
31.0
31.0
31.0
31.0
14.6
A81 Valve
D103301X012
35.2
35.0
33.8
28.7
13.8
10.3
3.4
35.2
35.1
25.9
6.8
6.3
5.9
5.6
5.3
5.1
5.0
4.8
4.8
12.8
12.8
12.8
12.8
12.5
12.1
11.8
11.4
11.2
17.2
17.2
17.2
17.2
17.2
9.1
41.4
38.8
35.7
28.7
13.8
10.3
3.4
41.4
38.6
25.9
7.0
6.5
6.1
5.7
5.4
5.2
5.0
5.0
4.9
8.0
7.9
7.1
6.8
6.3
6.1
5.9
5.6
5.4
17.2
17.2
17.2
17.2
17.2
9.4
10
Page 11
A81 Valve
D103301X012
Table 6. Maximum Allowable Shutoff Pressure Drops based on Trim (Seal, Shaft, and Bearings), Psi
Note: Donot exceed the EN or ASME pressure/temperature rating of the valve or mating flanges.
NPS
TRIM TEMPERATURE, _F
-50 to150
200
PTFE or RPTFE Seal
PEEK/PTFE Bearings
UHMWPE Seal
PEEK/PTFE Bearings
Metal Seal
Alloy 6 Bearings
Metal Seal
S31600/Nitride
Metal Seal
PEEK/PTFE Bearings
1. Pressure drops shown for metal seals arefor forward flow only.
(1)
(1)
Bearings
(1)
250
300
375
400
450
0 to100
150
200
-50 to100
200
300
400
500
600
700
800
850
-50 to100
200
300
400
500
600
700
800
850
-50 to100
200
300
400
450
500
2 3 4 6 8 10 12
Psi
750
704
560
416
200
150
50
750
560
375
268
246
232
219
208
200
192
181
176
283
280
246
230
211
200
192
181
176
750
750
730
705
685
358
750
704
560
416
200
150
50
750
560
375
239
219
206
195
186
178
172
168
167
325
325
325
325
325
321
312
300
295
750
750
730
705
685
318
750
704
560
416
200
150
50
750
560
375
202
185
174
165
157
150
145
142
141
379
377
344
329
311
301
293
283
278
750
750
730
705
672
269
750
704
560
416
200
150
50
750
560
375
185
170
160
151
144
138
134
130
129
301
299
271
258
243
235
228
220
216
750
750
730
699
618
247
750
704
560
416
200
150
50
750
560
375
159
146
137
130
124
119
115
112
111
400
400
400
382
357
337
325
316
313
450
450
450
450
450
212
Product Bulletin
21.1:A81
July 2012
511
508
490
416
200
150
50
511
509
375
99
91
86
81
77
74
72
70
69
185
185
185
185
182
176
171
165
162
250
250
250
250
250
132
600
563
518
416
200
150
50
600
560
375
102
94
88
83
79
76
73
72
71
116
115
103
98
91
88
85
81
79
250
250
250
250
250
136
Table 7. ISO 5211 F Sizes Available with Optional Mounting Bracket
VALVE SIZE
DN NPS
50 2 F07, F10
80 3 F07, F10
100 4 F07, F10,F12, F14, F16
150 6 F07, F10,F12, F14, F16
200 8 F10, F12,F14, F16
250 10 F10, F12,F14, F16
300 12 F10, F12,F14, F16
ISO 5211F SIZES
11
Page 12
Product Bulletin
21.1:A81
July 2012
Table 8. Dimensions and Weights
VALVE SI ZE /
A C D E
PRESSURE RATING
PN10-40/
DN50/
NPS 2
DN80/
NPS 3
DN100/
NPS 4
DN150/
NPS 6
DN200/
NPS 8
DN250/
NPS 10
DN300/
NPS 12
DN50/
NPS 2
DN80/
NPS 3
DN100/
NPS 4
DN150/
NPS 6
DN200/
NPS 8
DN250/
NPS 10
DN300/
NPS 12
CL150-
300
PN10-40/
CL150-
300
PN10-40/
CL150-
300
PN10-40/
CL150-
300
PN10-16/
CL150
PN25-40/
CL300
PN10-16/
CL150
PN25-40/
CL300
PN10-16/
CL150
PN25-40/
CL300
PN10-40/
CL150-
300
PN10-40/
CL150-
300
PN10-40/
CL150-
300
PN10-40/
CL150-
300
PN10-16/
CL150
PN25-40/
CL300
PN10-16/
CL150
PN25-40/
CL300
PN10-16/
CL150
PN25-40/
CL300
1. This nominal valve shaft diameter is the shaft diameter through the packing box. Use this diameter when selectingFisher actuators.
2. Valve assembly only.
3. 48 mm for CL150and CL300 single flange only.
4. Wafer
5. Single Flange
43 9 15 74 150 --- 109 --- 125 102 12.7 117 --- 14 4.7 6.7
47/
48
(3)
53 14 19 103 222 226 122 147 172 162 19.1 152 32 14 12.5 17.6
57 19 25 108 270 300 147 182 205 218 25.4 152 32 14 15.7 26.5
61 22 30 107 327 342 225 225 258 271 31.8 235 46 18 30.2 40.2
73 22 30 107 358 364 225 225 258 285 31.8 235 46 18 33.9 46.0
69 22 30 109 390 395 218 250 270 324 31.8 235 46 18 38.9 50.5
83 22 30 109 400 450 265 265 270 345 31.8 235 46 18 51.8 79.2
78 27 35 114 381 467 309 309 304 381 38.1 235 46 18 68.7 98.3
92 27 35 114 410 512 309 309 304 410 38.1 235 46 18 76.6 105
1.69 0.35 0.59 2.91 5.91 --- 4.29 --- 4.92 4.02 0.50 4.62 --- 0.55 10 15
1.85/
1.89
(3)
2.09 0.55 0.75 4.06 8.74 8.90 4.80 5.79 6.77 6.38 0.75 6.00 1.25 0.55 28 39
2.24 0.75 0.94 4.25 10.63 11.81 5.79 7.17 8.07 8.58 1.00 6.00 1.25 0.55 35 58
2.40 0.87 1.18 4.21 12.87 13.46 8.86 8.86 10.16 10.67 1.25 9.25 1.81 0.71 67 89
2.87 0.87 1.18 4.21 14.09 14.33 8.86 8.86 10.16 11.22 1.25 9.25 1.81 0.71 75 102
2.72 0.87 1.18 4.29 15.35 15.55 8.58 9.84 10.63 12.76 1.25 9.25 1.81 0.71 86 111
3.27 0.87 1.18 4.29 15.75 17.72 10.43 10.43 10.63 13.58 1.25 9.25 1.81 0.71 114 175
3.07 1.06 1.38 4.49 15.00 18.39 12.17 12.17 11.97 15.00 1.50 9.25 1.81 0.71 151 217
3.62 1.06 1.38 4.49 16.14 20.16 12.17 12.17 11.97 16.14 1.50 9.25 1.81 0.71 169 231
11 15 76 196 196 133 133 130 134 15.9 117 --- 14 7.5 11.2
0.43 0.59 2.99 7.72 7.72 5.24 5.24 5.12 5.28 0.63 4.62 --- 0.55 17 25
F G
(4) (5) (4) (5) (4) (5)
K R S
mm kg
Inches lbs
(1)
T U W
A81 Valve
D103301X012
APPROX-
IMATE
(2)
WEIGHT
12
Page 13
Product Bulletin
A81 Valve
D103301X012
Table9.LineBoltingDimensions
Y
VALVE SIZE
CL150 CL300 PN10 PN16 PN25 PN40
DN80 / NPS 3 4X 5/8-11 8X 3/4-10 8X M20X2.5
DN100 / NPS 4 8X 5/8-11 8X 3/4-10 8X M16X2 8X M20X2.5
DN150 / NPS 6 8X 3/4-10 12X 3/4-10 8XM20X2.5 8X M24X3
DN200 / NPS 8 8X 3/4-10 12X 7/8-9 8X M20X2.5 12X M20X2.5 12X M24X3 12X M27X3
DN250 / NPS 10 12X 7/8-9 16X 1-8 12X M20X2.5 12X M24X3 12X M27X3 12X M30X3.5
DN300 / NPS 12 12X 7/8-9 16X 1-1/8-8 12X M20X2.5 12X M24X3 16X M27X3 16X M30X3.5
1. Not availablein single flange with threaded holes.
Pressure Rating
21.1:A81
July 2012
(1)
(1)
(1)
Figure 8. Dimensions for Fisher A81, Single Flange Valve
Y
F
R
GE42533_3
G
K
Figure 9. Dimensions for Fisher A81, Wafer Style Valve
A
D
C
S
E
A
T
W
A
T
W
U
A
F
GE42533_3
R
D
C
S
KG
E
TT
W
U
W
13
Page 14
Product Bulletin
21.1:A81
July 2012
A81 Valve
D103301X012
Table 10. Dimensions and Weights, Optional Mounting Bracket
(1)
VALVE SIZE /
PRESSURE RATING
DN50/
NPS 2
DN80/
NPS 3
DN100/
NPS 4
DN150/
NPS 6
DN200/
NPS 8
DN250/
NPS 10
DN300/
NPS 12
1. This nominal valve shaft diameter is the shaft diameter through the packing box. Use this diameter when selectingFisher actuators.
PN10-40/
CL150-300
PN10-40/
CL150-300
PN10-40/
CL150-300
PN10-40/
CL150-300
PN10-16/
CL150
PN25-40/
CL300
PN10-16/
CL150
PN25-40/
CL300
PN10-16/
CL150
PN25-40/
CL300
S
mm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch
12.7 0.50 9 0.35 74 2.91 64 2.52 10 0.39
15.9 0.63 11 0.43 76 2.99 64 2.52 12 0.47
19.1 0.75 14 0.55 103 4.06 87 3.43 16 0.63
25.4 1.00 19 0.75 108 4.25 87 3.43 21 0.82
31.8 1.25 22 0.87 107 4.21 85 3.35 22 0.87
31.8 1.25 22 0.87 107 4.21 85 3.35 22 0.87
31.8 1.25 22 0.87 109 4.29 85 3.35 24 0.94
31.8 1.25 22 0.87 109 4.29 85 3.35 24 0.94
38.1 1.50 27 1.06 114 4.49 85 3.35 29 1.14
38.1 1.50 27 1.06 114 4.49 85 3.35 29 1.14
C E L M T U W
49.50 1.95 49.50 1.95 10 0.39 F07
72.12 2.84 72.12 2.84 12 0.47 F10
49.50 1.95 49.50 1.95 10 0.39 F07
72.12 2.84 72.12 2.84 12 0.47 F10
49.50 1.95 49.50 1.95 10 0.39 F07
72.12 2.84 72.12 2.84 12 0.47 F10
88.39 3.48 88..39 3.48 14 0.55 F12
49.50 1.95 49.50 1.95 10 0.39 F07
72.12 2.84 72.12 2.84 12 0.47 F10
88.39 3.48 88.39 3.48 14 0.55 F12
99.00 3.90 99.00 3.90 18 0.71 F14
116.67 4.59 116.67 4.59 22 0.87 F16
72.12 2.84 72.12 2.84 12 0.47 F10
88.39 3.48 88.39 3.48 14 0.55 F12
99.00 3.90 99.00 3.90 18 0.71 F14
116.67 4.59 116.67 4.59 22 0.87 F16
72.12 2.84 72.12 2.84 12 0.47 F10
88.39 3.48 88.39 3.48 14 0.55 F12
99.00 3.90 99.00 3.90 18 0.71 F14
116.67 4.59 116.67 4.59 22 0.87 F16
72.12 2.84 72.12 2.84 12 0.47 F10
88.39 3.48 88.39 3.48 14 0.55 F12
99.00 3.90 99.00 3.90 18 0.71 F14
116.67 4.59 116.67 4.59 22 0.87 F16
ISO
5211
Figure 10. Dimensions for Fisher A81, Wafer Style Valve with Optional Mounting Bracket
S
L
E
GE42533_3
M
TC
W
U
14
Page 15
Product Bulletin
A81 Valve
D103301X012
Table 11. Fisher A81 Valve Breakout Torque Requirements
TRIM CONFIGURATION: SOFT SEAL WITH PEEK/PTFE BEARINGS
200
psid
200
psid
TORQUE, NSm
Shutoff nP
TORQUE, LbfSin
Shutoff nP
TORQUE, NSm
Shutoff nP
TORQUE, LbfSin
Shutoff nP
max
max
300
psid
max
max
300
psid
400
psid
400
psid
500
psid
500
psid
600
psid
600
psid
VALVE
SIZE
DN mm 3bar 7bar 10 bar 15 bar 20 bar 25 bar 35 bar 45 bar 50 bar
50 12.7 12.8 14.7 16.2 18.7 21.1 23.6 28.5 33.4 35.9
80 15.9 19.7 23.4 26.1 30.7 35.3 39.9 49.1 58.2 62.8
100 19.1 31.1 37.6 42.4 50.5 58.7 66.8 83.0 99.2 107
150 25.4 60.8 75.9 87.2 106 125 144 181 219 238
200 31.8 103 135 158 198 237 276 355 434 473
250 31.8 159 212 252 318 385 451 584 --- ---
300 38.1 228 310 371 473 576 678 883 --- ---
VALVE
SIZE
NPS Inch
2 1/2 115 130 145 160 190 220 250 280 325
3 5/8 178 206 234 262 318 374 430 486 570
4 3/4 282 331 381 430 529 628 727 826 975
6 1 553 668 783 898 1130 1360 1590 1820 2160
8 1-1/4 945 1190 1430 1670 2150 2630 3110 3590 4310
10 1-1/4 1460 1870 2270 2680 3490 4300 5110 --- ---
12 1-1/2 2100 2720 3350 3970 5220 6470 7720 8970 ---
VALVE
SIZE
DN mm 3bar 7bar 10 bar 15 bar 20 bar 25 bar 35 bar 45 bar 50 bar
50 12.7 37.3 42.4 46.2 52.5 --- --- --- --- ---
80 15.9 67.7 78.9 87.3 101 115 --- --- --- ---
100 19.1 112 134 151 178 208 233 --- --- ---
150 25.4 241 292 331 395 458 --- --- --- ---
200 31.8 310 422 506 646 786 927 --- --- ---
250 31.8 598 761 884 --- --- --- --- --- ---
300 38.1 926 1270 --- --- --- --- --- --- ---
VALVE
SIZE
NPS Inch
2 1/2 336 374 413 451 --- --- --- --- ---
3 5/8 611 696 782 867 1040 --- --- --- ---
4 3/4 1020 1180 1350 1520 1850 --- --- --- ---
6 1 2190 2580 2970 3360 4140 --- --- --- ---
8 1-1/4 2860 3710 4570 5420 7130 --- --- --- ---
10 1-1/4 5450 6700 7950 --- --- --- --- --- ---
12 1-1/2 8540 11200 --- --- --- --- --- --- ---
SHAFT DIA
SHAFT DIA
SHAFT DIA
SHAFT DIA
50
psid
50
psid
100
psid
TRIM CONFIGURATION: METAL SEAL WITH METAL BEARINGS
100
psid
150
psid
150
psid
21.1:A81
July 2012
750
psid
750
psid
15
Page 16
Product Bulletin
21.1:A81
July 2012
A81 Valve
D103301X012
FieldQ Actuator Features
Simple, modular construction– Makes operation
and maintenance easier. The basic actuator module
includes the pistons, rack and pinion gear, springs
(for spring-return actuators), housing, and position
indicator. Pneumatic operation is accomplished
with an ASCO 8551 solenoid valve. The solenoid is
activated by a 120 VAC 60 Hz or 110 VAC 50 Hz
signal. It is pad mounted and does not require a
bracket. The basic actuator features built-in visual
position indication, travel stops for both directions,
and a balanced pinion design.
Three Point Suspension System–Three carbon-filled
PTFE guide bands provide a low friction bearing
surface for piston alignment and rack support.
Elimination of metal-to-metal contact between
pistons and cylinder wall reduces friction for
outstanding cycle life, smooth piston travel, and
maximum power.
Balanced Piston Design–As part of the design, three
equally spaced bearing surfaces are cast into each
piston. The rack and pinion construction results in
even distribution of bearing loads, optimum gear
engagement, and reduced piston tilt. Equal spring
force applied to each piston enhances actuator life.
Multiple Constructions–Conversion from double
acting to spring return, or vice versa, is simple and
safe, thus reducing spare part requirements.
Valve/actuator action is also field reversible.
Dual Stop Adjustment– This adjustment is standard
on all E Series actuators. The P Series actuators are
supplied with a limit plate adjustment feature.
Dual Piston Design–Air pressure applies a balanced
force across the common pinion gear.
Symmetrically balanced center mount construction
eliminates undue stress on the valve stem,
bearings, and disk.
For further information, refer to:
http://www.emersonprocess.com/valveautomation/
fieldq/index.html
Neither Emerson, Emerson Process Management,nor any of their affiliated entitiesassumes responsibility for the selection, use or maintenance
of any product. Responsibility for proper selection, use,and maintenance of any product remains solely with the purchaser and end user.
Fisher, POSI-SEAL, FieldQ, and ENVIRO-SEAL are marks owned by one ofthe companies inthe Emerson Process Management business unit of Emerson
Electric Co. Emerson Process Management, Emerson, and t he Emerson logoare trademarks andservice 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 available uponrequest. We reserve the right tomodify orimprove thedesigns or specifications ofsuch
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 2008, 2012 Fisher ControlsInternational LLC.All rights reserved.
16
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