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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 eccentrically-

mounted 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.

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 Standa rds– 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. I t

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 t here 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.

A81 Valve

D103301X012

Product Bulletin

21.1:A81

July 2012

Summary of content (16 pages)

PAGE 1
Product Bulletin A81 Valve 21.1:A81 July 2012 D103301X012 Fisherr POSI-SEAL™ A81 Rotary Valve The Fisher POSI-SEAL A81 rotary valve with FieldQt 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.
PAGE 2
Product Bulletin A81 Valve 21.1:A81 July 2012  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).
PAGE 3
Product Bulletin A81 Valve 21.1:A81 July 2012 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 NPS 2, 3, 4, 6, 8, 10, and 12 Pressure Rating PN 10 to 40 per EN 12516-1 CL150 / 300 per ASME B16.34 Valve Body Materials PTFE or RPTFE(4) Seal Disk Materials WCC steel EN 1.
PAGE 4
Product Bulletin A81 Valve 21.1:A81 July 2012 D103301X012 Figure 1.
PAGE 5
Product Bulletin A81 Valve 21.1:A81 July 2012 D103301X012 Figure 2. Comparison of Disk Action SEAL RING (SOFT SEAL CONSTRUCTION SHOWN) ECCENTRIC DISK CENTER OF ROTATION CENTERLINE OF VALVE BODY OPEN CONVENTIONAL DISK CENTER OF ROTATION CONVENTIONAL DISK PATH OF ROTATION ECCENTRIC DISK PATH OF ROTATION ECCENTRIC DISK CONVENTIONAL DISK VALVE BODY GE36289-A DISK FULLY CLOSED DISK FULLY OPEN Figure 3.
PAGE 6
Product Bulletin A81 Valve 21.1:A81 July 2012 D103301X012 Figure 4. Travel Indication GE36289 Table 4. Material Temperature Capabilities MATERIAL TEMPERATURE LIMITS PN FLANGES Valve Body Shaft Bearing Lining and Jacket Seal Packing _C _F 1.
PAGE 7
A81 Valve D103301X012 Product Bulletin 21.1:A81 July 2012 Figure 5.
PAGE 8
Product Bulletin A81 Valve 21.1:A81 July 2012 D103301X012 Figure 6. Material Pressure/Temperature Curves 1 2 1. CW2M is not listed in EN 12516-1 or ASME B16.34. The PN and CL designations are used only to indicate relative pressure-retaining capabilities. 2. M35-2 is not listed in EN 12516-1. The PN designations are used only to indicate relative pressure-retaining capabilities.
PAGE 9
A81 Valve D103301X012 Product Bulletin 21.1:A81 July 2012 Figure 7.
PAGE 10
Product Bulletin A81 Valve 21.1:A81 July 2012 D103301X012 Table 5. Maximum Allowable Shutoff Pressure Drops based on Trim (Seal, Shaft, and Bearings), Bar Note: Do not exceed the EN or ASME pressure/temperature rating of the valve or mating flanges. DN TRIM TEMPERATURE, _C 50 80 100 150 200 250 300 Bar PTFE or RPTFE Seal PEEK/PTFE Bearings -46 to 65 93 121 149 191 204 232 51.7 48.5 38.6 28.7 13.8 10.3 3.4 51.7 48.5 38.6 28.7 13.8 10.3 3.4 51.7 48.5 38.6 28.7 13.8 10.3 3.4 51.7 48.5 38.
PAGE 11
Product Bulletin A81 Valve 21.1:A81 July 2012 D103301X012 Table 6. Maximum Allowable Shutoff Pressure Drops based on Trim (Seal, Shaft, and Bearings), Psi Note: Do not exceed the EN or ASME pressure/temperature rating of the valve or mating flanges.
PAGE 12
Product Bulletin A81 Valve 21.1:A81 July 2012 D103301X012 Table 8. Dimensions and Weights VALVE SIZE / PRESSURE RATING A C D F E (4) G (5) (4) K R S(1) T U W (5) APPROXIMATE WEIGHT(2) (4) mm DN50/ NPS 2 PN10-40/ CL150300 DN80/ NPS 3 PN10-40/ CL150300 DN100/ NPS 4 DN150/ NPS 6 DN200/ NPS 8 DN250/ NPS 10 DN300/ NPS 12 kg 43 9 15 74 150 --- 109 --- 125 102 12.7 117 --- 14 4.7 6.7 47/ 48 11 15 76 196 196 133 133 130 134 15.9 117 --- 14 7.5 11.
PAGE 13
Product Bulletin A81 Valve 21.1:A81 July 2012 D103301X012 Table 9. Line Bolting Dimensions Y Pressure Rating VALVE SIZE CL150 CL300 DN80 / NPS 3 4X 5/8-11 8X 3/4-10 PN10 PN16 PN25 PN40 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 8X M20X2.5 8X M24X3(1) 8X M20X2.5 DN200 / NPS 8 8X 3/4-10 12X 7/8-9 8X M20X2.5 12X M20X2.5 12X M24X3 12X M27X3(1) DN250 / NPS 10 12X 7/8-9 16X 1-8 12X M20X2.5 12X M24X3 12X M27X3 12X M30X3.
PAGE 14
Product Bulletin A81 Valve 21.1:A81 July 2012 D103301X012 Table 10. Dimensions and Weights, Optional Mounting Bracket VALVE SIZE / PRESSURE RATING DN50/ NPS 2 PN10-40/ CL150-300 DN80/ NPS 3 PN10-40/ CL150-300 DN100/ NPS 4 DN150/ NPS 6 DN200/ NPS 8 DN250/ NPS 10 DN300/ NPS 12 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(1) C E L M T mm inch mm inch mm inch mm inch mm inch 12.7 0.50 9 0.
PAGE 15
Product Bulletin A81 Valve 21.1:A81 July 2012 D103301X012 Table 11. Fisher A81 Valve Breakout Torque Requirements TRIM CONFIGURATION: SOFT SEAL WITH PEEK/PTFE BEARINGS VALVE SIZE TORQUE, NSm SHAFT DIA Shutoff nPmax DN mm 3 bar 7 bar 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.
PAGE 16
Product Bulletin A81 Valve 21.1:A81 July 2012 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.