Emerson Fisher POSI-SEAL A41 Instruction Manual
Instruction Manual
D500211X012
A41 Valve
November 2012
Fisherr A41 High Performance Butterfly Valve
Contents
Introduction 1...................................
Scope of Manual 1............................
Description 1................................
Specifications 2..............................
Educational Services 2.........................
Installation 5
Valve Orientation 6...........................
Maintenance 9
Packing Maintenance 12.......................
Seal Ring Maintenance for NPS 3 through 12 13....
Seal Ring Maintenance for NPS 2 19..............
Disc, Drive Shaft and Bearing Maintenance for
NPS 3 through 12 20........................
Disc, Drive Shaft and Bearing Maintenance for
NPS 2 24..................................
Actuator Mounting 26.........................
Parts Ordering 27
Retrofit Kits for ENVIRO-SEALt Packing 27........
Repair Kits for ENVIRO-SEAL Packing 28...........
Parts List 28...................................
....................................
..................................
................................
Introduction
Figure 1. Fisher A41 Valve
W9269
Scope of Manual
This instruction manual includes installation, maintenance, and parts information for Fisher A41 high performance
butterfly valves (figure 1). Refer to separate instruction manuals for information covering the power on-off actuator
and accessories.
Do not install, operate, or maintain A41 valves without being fully trained and qualified in valve, actuator, and
accessory installation, operation, and maintenance. To avoid personal injury or property damage, it is important to
carefully read, understand, and follow all the contents of this manual, including all safety cautions and warnings. If you
have any questions about these instructions, contact your Emerson Process Management sales office before
proceeding.
Description
The A41 high performance butterfly valves have eccentrically mounted discs to reduce wear and reduce torque
requirements. The valve includes filled-PTFE or graphite packing rings that electrically bond the shaft to the valve
body. This valve has a Double D drive shaft end, and soft or metal seal rings for use in a wide variety of applications.
www.Fisher.com
A41 Valve
November 2012
Table 1. Specifications
Instruction Manual
D500211X012
Valve Sizes and End Connection Styles
NPS J 2,
J 3, J 4, J 6, J 8, J 10, and J 12 valves
Flow Characteristic
Approximately linear
in wafer or single flanged style (NPS 2 available in
wafer style only)
Flow Direction
Seefigure4
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
(1)
Disc Rotation
Clockwise to close (when viewing the drive shaft end)
through 90 degrees of disc rotation (see figure 7)
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 2)
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
Shutoff Classifications
J PTFE, Reinforced PTFE, and UHMWPE
(2)
Seal: No
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
psigforwardand100psigreverse
J NOVEX Seal: Unidirectional shutoff is MSS SP-61 in
the preferred flow direction
J Phoenix III Seal: No visible leakage for this
bidirectionalsealperMSSSP-61.ForoptionalPhoenix
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 forvalve should not be exceeded.
2. UHMWPE stands for ultra high molecular weight polyethylene.
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
Educational Services
For information on available courses for the Fisher A41 high performance butterfly valve, as well as a variety of other
products, contact:
Emerson Process Management
Educational Services, Registration
P.O. Box 190; 301 S. 1
Marshalltown, IA 50158-2823
Phone: 800-338-8158 or
Phone: 641-754-3771
FAX: 641-754-3431
e-mail: education@emerson.com
2
st
Ave.
Instruction Manual
D500211X012
Table 2. Valve Size, Shaft Diameter, and Approximate Weight
VALVE SIZE,
NPS
2 150/300/600 12.7 1/2 4.3 9.5 --- ---
3
4
6
8
10
12
PRESSURE
CLASS
150 12.7 1/2 4.5 10 6.4 14
300 15.9 5/8 5.9 13 11 25
150 15.9 5/8 8.6 19 11 24
300 19.1 3/4 10 23 18 39
150 19.1 3/4 13 29 16 35
300 25.4 1 15 33 27 59
150 25.4 1 21 47 27 59
300 31.8 1-1/4 24 53 42 93
150 31.8 1-1/4 34 75 40 88
300 38.1 1-1/2 44 96 78 172
150 38.1 1-1/2 49 107 62 137
300 44.5 1-3/4 64 141 131 288
SHAFT DIAMETER
mm Inches kg Pounds kg Pounds
Wafer-Style Single-Flange
APPROXIMATE WEIGHT
A41 Valve
November 2012
Table 3. Maximum Allowable Inlet Pressure for M35-1 and CW2M Valve Bodies
TEMPERATURE M35-1 CW2M
_C Bar
-46 to 38
93
149
204
260
TEMPERATURE CL150 CL300 CL600
_F Psig
-50 to 100
200
300
400
500
1. M35-1 and CW2M valvematerial are not included in ASME B16.34 pressure/ temperatureratings. The designations 150and 300 for this valve material areusedonlytoindicaterelativepres
sure/retaining capabilities and are not ASME pressure/ temperature rated classes.
2. CL600 is only availablein NPS 2.
15.8
13.8
13.1
12.7
11.7
230
200
190
185
170
41.3
36.5
34.1
33.1
32.8
600
530
495
480
475
82.7
72.7
68.2
65.8
65.5
(2)
1200
1055
990
955
950
(1)
20.0
17.9
15.9
13.8
11.7
CL150 CL300 CL600
290
260
230
200
170
51.7
51.7
50.3
48.6
45.9
750
750
730
705
665
103.4
103.4
100.3
97.2
91.7
1,500
1,500
1,455
1,410
1,330
(2)
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A41 Valve
November 2012
Figure 2. Maximum Pressure/Temperature Ratings
OPERATING TEMPERATURE, _C
PHOENIX III SEAL
WITH PTFE INSERT
PTFE AND REINFORCED
PTFE SEAL
UHMWPE
SEAL
DIFFERENTIAL PRESSURE, PSI
OPERATING TEMPERATURE, _F
NOTE:
1
LIMITATIONS IMPOSED BY THE BACKUP RING USED WITH THISSEAL.
TO DETERMINE THE EFFECTIVE TEMPERATURELIMITATION OF THE
APPROPRIATE SEAL/BACKUP RING COMBINATION, REFER TO TABLE 4.
A6306-2
TEMPERATURE LIMITATIONS DO NOT ACCOUNT FOR THE ADDITIONAL
Instruction Manual
D500211X012
Table 4. Construction Material Temperature Limits
COMPONENTS AND MATERIALS OF CONSTRUCTION
Valve Body Material
Carbon Steel
CF8M
CG8M
Disc Material
S31600
CG8M
Shaft Material
S20910
S17400
Bearing Material
PEEK / PTFE lined
Metal
Packing Material
PTFE V-rings
Graphite rings
Seal Ring
PTFE (Standard) -46 to 232 -50 to 450
Reinforced PTFESoft Seal Ring -46 to 232 -50 to 450
UHMWPE Soft Seal Ring -18 to 93 0to200
NOVEX MetalSealRing -46 to 538 -50 to 1000
NPS2MetalSealring -46 to 538 -50 to1000
Phoenix III MetalSealRing
Fluorocarbon backup ring -40 to 232 -40 to 450
Phoenix III Fire-Tested
Fluorocarbon backup ring
(Specify metal bearings and graphite packing)
1. For component selection and applicable fire-tested standards and codes, consult your Emerson Process Managementsales office.
(1)
MetalSealRing
TEMPERATURE LIMITS
_C _F
-29 to 427
-198 to538
-198 to538
-198 to538
-198 to538
-198 to538
-62 to 427
-73 to 260
-198 to538
-46 to 232
-198 to438
(1) (1)
-20 to 800
-325 to1000
-325 to1000
-325 to1000
-325 to1000
-325 to1000
-80 to 800
-100 to500
-325 to1000
-50 to 450
-325 to1000
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Instruction Manual
D500211X012
A41 Valve
November 2012
Hex Head Cap Screw and Stud Bolt Data
WAFER STYLE SINGLE FLANGESTYLE
VALVE
SIZE,
NPS
(2)
2
3 4 5/8-11 5.75 8 3/4-10 6.5 8 5/8-11 1.875 16 3/4-10 2
4 8 5/8-11 6 8 3/4-10 7 16 5/8-11 2 16 3/4-10 2.25
6 8 3/4-10 6.5 12 3/4-10 7.5 16 3/4-10 2 24 3/4-10 2.5
8 8 3/4-10 7 12 7/8-9 9 16 3/4-10 2.25 24 7/8-9 3
10 12 7/8-9 8 16 1-8 10 24 7/8-9 2.5 32 1-8 3.5
12 12 7/8-9 8.5 16 1-1/8-8 11 24 7/8-9 2.75 32 1-1/8-8 3.75
1. Thread engagement in accordance with ASME B31.3.
2. The NPS 2 valve is only available in wafer style and is multiratedto CL150, 300 and 600.The CL600 stud boltsrequire 8 bolts, have a dia. of 5/8-11, and are6 inches long.
No. of
Stud
Bolts
4 5/8-11 5 8 5/8-11 5.25 --- --- --- --- --- ---
CL150 CL300 CL150 CL300
Size Dia
Inch &
Thread
A
Dimen-
sion,
Inch
(1)
No. of
Stud
Bolts
Size Dia
Inch &
Thread
A
Dimen-
sion,
Inch
No. of
Cap
Screws
Size Dia
Inch &
Thread
B
Dimen-
sion,
Inch
No. of
Cap
Screws
Size Dia
Inch &
Thread
Figure 3. Cap Screws and Stud Bolts for Installation
A3887
A
A3886
STUD BOLT CAP SCREW
B
B
Dimen-
sion,
Inch
Installation
The valve is normally shipped as part of a valve assembly, with the actuator, handlever, or handwheel mounted on the
valve. If the valve or actuator have been purchased separately, or if the actuator has been removed for maintenance,
mount the actuator on the valve, and adjust actuator travel before inserting the valve body into the line. This is
necessary due to the measurements that must be made during the actuator calibration adjustment process. Refer to
the Actuator Mounting section of this manual and to the separate actuator or handlever instruction manual for
mounting and adjustments before proceeding.
WARNING
Always wear protective gloves, clothing and eyewear when performing any installation or maintenance operations to
avoid personal injury.
To avoid personal injury or property damage resulting from the sudden release of pressure, do not install the valve
assembly where service conditions could exceed the limits giveninthismanual,thelimitsontheappropriatenameplates,
or the matching pipe flange rating. Use pressure-relieving devices as required by government or accepted industry codes
andgoodengineeringpractices.
Check with your process or safety engineer for any additional measures that must be taken to protect against process
media.
If installing into an existing application, also refer to the WARNING at the beginning of the Maintenance section in this
instruction manual.
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A41 Valve
November 2012
Instruction Manual
D500211X012
CAUTION
The valve configuration and construction materials were selected to meet particular pressure, temperature, pressure drop,
and controlled fluid conditions specified in the customer's order. Because some body/trim material combinations are
limited in their pressure drop and temperature range capabilities (especially due to differences in thermal expansion rates),
do not apply any other conditions to the valve without first contacting your Emerson Process Management sales office.
1. Install a three-valve bypass around the control valve assembly if continuous operation is necessary during
inspection and maintenance of the valve.
2. Inspect the valve to be certain that it is free of foreign material.
3. Be certain that adjacent pipelines are free of any foreign material, such as pipe scale or welding slag, that could
damage the valve sealing surfaces.
CAUTION
Damage to the disc will occur if any pipe flanges or piping connected to the valve interfere with the disc rotation path. If the
piping flange has a smaller inner diameter than specified for schedule 80 piping, measure carefully to be certain the disc
rotates without interference before putting the valve into operation.
Valve Orientation
When installing the valve, it is highly recommended that the valve drive shaft be horizontal as shown in figure 4.
Valve Direction
The high performance butterfly valve is designed to allow flow in either direction when in the open position. When in
the closed position, high pressure should be applied to a specific side of the disc to provide best performance and
optimal valve life (see list of seal types below). See figure 4.
Table 5. Special Spiral Wound Gasket Dimensions, Inches
Valve Size, NPS Class Gasket Internal Diameter Gasket Outside Diameter
3 150 4.25 5.00 5.375
3 300 4.25 5.00 5.875
4 150 5.25 6.125 6.875
4 300 5.25 6.125 7.125
1. Dimension per API 601 and ASME B16.5 Flanges.
Applications with bi-directional seals, such as soft or Phoenix III, under normal operating conditions can (at different
times) experience pressure in both directions; the highest of the two pressures should be exerted on the preferred side
of the disc. If the two pressures are equal, then the one lasting the longest period of time should be applied to the
preferred side.
1. For PTFE, reinforced PTFE, or UHMWPE seal rings: This seal is bidirectional. For best performance, high pressure
should be applied to the front (retaining ring) side of the disc.
2. For metal seal rings:
Centering Outside
Diameter
(1)
a. NOVEX seal: The NOVEX seal is uni-directional. High pressure at the closed position MUST be at the back
(waterway side) of the disc.
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Instruction Manual
D500211X012
A41 Valve
November 2012
b. Phoenix III Seal: This seal is bidirectional. For best performance, high pressure at the closed position should be
applied to the back (waterway side) of the disc.
c. NPS 2 Seal: The preferred direction of installation is with high pressure at the front (retaining ring side) of the
disc. Reverse shutoff is permissible at lower pressure (see spec ifications table).
Installing the Valve in the Pipeline
WARNING
The edges of a rotating disc have a shearing effect that may result in personal injury. To help prevent such injury, stay clear
of the disc edges when rotating the disc (figure 4).
CAUTION
Damage to the disc (key 3, figure 12) sealing surfaces may occur if the disc is not closed when the valve is being installed or
removed from the pipeline. If necessary, provide a loading pressure to the actuator temporarily to retain the disc in the
closed position while installing or removing the valve from the pipeline.
1. For Fail-Open Actuators: It will be necessary to provide a temporary loading pressure to the actuator diaphragm to
move the valve disc to the closedposition.ObservetheaboveWarning when closing the valve. If a loading pressure
is required, use caution when working with the valve. If the loading pressure is disconnected, the disc will open
rapidly.
2. With the disc in the closed position, install line flange gaskets, and insert the valve between the pipeline flanges.
WARNING
If spiral wound gaskets are to be used with an NPS 3 or 4 CL150 or 300 single flange valve, special spiral wound gaskets
conforming to the dimensions listed in table 5 MUST be used. Improperly sized gaskets may increase the likelihood of 1)
excessive seat leakage, 2) damage due to contact with valve internals, and 3) external leakage; which may result in
personal injury due to a sudden increase or decrease of pressure within
special dimension spiral wound gaskets can be obtained from your local spiral wound gasket vendor.
The remaining single flange valve sizes (NPS 6 through 12) and all wafer style valves (NPS 2 through 12) use the standard
size spiral wound gaskets. Only the single flange valves in the sizes and pressures listed in the table above require special
spiral wound gaskets.
Select the appropriate gaskets for the application. Flat sheet, spiral wound (NPS 6 through 12), or other gasket types
made to ASME 16.5 group or a user's standards can be used for A41 valves depending on the service conditions and
applications.
3. Install the flange studs:
-- or release of pressure from -- the pipeline. The
Note
Lubricate line flange studs or bolts before inserting into flanges. If necessary, provide additional support for the control valve
assembly because of its combined weight.
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A41 Valve
November 2012
Instruction Manual
D500211X012
D Flange Studs: Install two or more line flange studs into the line flanges to help hold the valve in position while
centering the valve. Carefully center the valveontheflangestoensurediscclearance.
D Select and install two pipeline gaskets.
D Flange Cap Screws: If line flange cap screws are used, be certain the cap screw threads engage the tapped holes to a
depth equal to the flange cap screw diameter.
4. Install the remaining line flange bolts to secure the valve in the pipeline. Tighten the bolts in a crisscross pattern to
ensure proper alignment of the valve with the flanges.
Packing Adjustment and Shaft Bonding
WARNING
Personal injury could result from packing leakage. Valve packing was tightened before shipment; however, the packing
might require some readjustment to meet specific service conditions.
CAUTION
Excessive tightening of packing will accelerate wear and could produce higher rotating friction loads on the valve stem.
1. For PTFE or graphite packing: Tighten standard packing follower nuts only enough to prevent shaft leakage.
Excessive tightening of packing will accelerate wear and could produce higher rotating friction loads on the valve
stem. If necessary, refer to the Packing Maintenance section.
2. ENVIRO-SEAL Packing Systems will not require this initial re-adjustment. Refer to the separate ENVIRO-SEAL Packing
System for Rotary Valves Instruction Manual (D101643X012) for repair and adjustment procedures.
3. For hazardous atmosphere or oxygen service valves, read the following Warning, and provide the bonding strap
assembly mentioned below if the valve is used in an explosive or hazardous atmosphere.
WARNING
The valve drive shaft is not necessarily grounded to the pipeline when installed. If the process fluid or the atmosphere
around the valve is flammable, personal injury or property damage could result from an explosion caused by a discharge of
static electricity from the valve components.
Standard PTFE packing is composed of a partially conductive carbon-filled PTFE female adaptor with PTFE V-ring packing.
Standard graphite packing is composed of all conductive graphite ribbon packing rings. Alternate shaft-to-valve body
bonding is available for hazardous service areas where you feel the the standard packing is not sufficient to bond the shaft
to the valve (see the following steps).
For oxygen service applications it is necessary to provide alternate shaft-to-valve body bonding (see the following steps).
4. Attach the bonding strap assembly (key 131, figure 5) to the shaft with the clamp (key 130, figure 5).
5. Connect the other end of the bonding strap assembly to the valve flange cap screws.
6. For more information, refer to the Packing Maintenance section below.
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Instruction Manual
D500211X012
Figure 4. Flow Direction
RETAINER RING SIDE
A41 Valve
November 2012
RETAINER RING SIDE
MFG LABEL
FLOW ARROW
ARROW SHOWS PREFERRED FLOW DIRECTION FOR SOFT SEALS AND NPS 2 METAL SEAL
FORWARD FLOW
MFG LABEL
FLOW ARROW
ARROW SHOWS FLOW DIRECTION FOR NOVEX METAL SEAL, AND PREFERRED
FLOW DIRECTION FOR PHOENIX METAL SEAL
REVERSE FLOW
REVERSE
FLOW
FORWARD
FLOW
NOTES:
1. BY EMERSON PROCESS MANAGEMENT DEFINITION:
D FORWARD FLOW IS INTO THE FACESIDE OF THE DISC.
D REVERSE FLOW IS INTO THE HUB SIDE OF THE DISC.
75B1181-A
A6881-2
FACE SIDE OF DISC
Maintenance
Valve parts are subject to normal wear and must be inspected and replaced as necessary. The frequency of inspection
and replacement depends upon the severity of service conditions. Instructions are given in this section for replacing
packing, seal ring, disc, shaft, bearings, and other valve parts. Also, instructions are provided for changing valve action,
mounting, and adjusting the actuator. Refer to the actuator instruction manual for additional information for
mounting and adjusting the actuator.
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A41 Valve
November 2012
Instruction Manual
D500211X012
CAUTION
It is possible to damage the valve if the actuator travel stops are not properly adjusted before stroking the valve.
WARNING
Avoid personal injury or property damage from sudden release of process pressure or bursting of parts. Before performing
any maintenance operations:
D Do not remove the actuator from the valve while the valve is still pressurized.
D Always wear protective gloves, clothing, and eyewear when performing any maintenance operations to avoid personal
injury.
D Disconnect any operating lines providing air pressure, electric power, or a control signal to the actuator. Be sure the
actuator cannot suddenly open or close the valve.
D Use bypass valves or completely shut off the process to isolate the valve from process pressure. Relieve process pressure
from both sides of the valve. Drain the process media from both sides of the valve.
D Vent the pneumatic actuator loading pressure and relieve any actuator spring precompression.
D Use lock-out procedures to be sure that the above measures stay in effect while you work on the equipment.
D The valve packing box may contain process fluids that are pressurized, even when the valve has been removed from the
pipeline. Process fluids may spray out under pressure when removing the packing hardware or packing rings, or when
loosening the packing box pipe.
D Check with your process or safety engineer for any additional measures that must be taken to protect against process
media.
WARNING
The edges of a rotating disc have a shearing effect that may result in personal injury. To help prevent such injury, stay clear
of the disc edges when rotating the disc (key 3).
CAUTION
During the following steps, do not rotate the disc past 90 degrees in the open direction. Rotating the disc past 90 degrees
can damage the seal ring.
Use caution when tightening the packing flange nuts. Overtightened nuts can damage packing box parts.
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Instruction Manual
D500211X012
Figure 5. Optional Shaft-to-Valve Body Bonding Strap Assembly
VALVE BODY
ACTUATOR
A
A41 Valve
November 2012
37A6528-A
A3143-2
VIEW A-A
A
Stopping Leakage
For PTFE-filled or graphite standard packing arrangements covered in this manual, often leakage from the packing can
be stopped by tightening the packing flange nuts just enough to stop the leak. Use caution when tightening the nuts,
overtightened nuts can damage packing box parts.
D If tightening the packing flange nuts does not stop the leakage, use the following procedures to remove the control
valve assembly from the pipeline, remove the actuator, and to remove and replace the packing parts.
D If the leakage comes from the outside diameter of the packing box, it is possible that the leakage is caused by
scratches on the packing box wall. Carefully inspect the packing box bore and valve drive shaft when the packing is
removed. Use the following steps to remove the actuator, and to remove and replace the packing parts.
Removing the Actuator
WARNING
Refer to the WARNING at the beginning of the Maintenance section in this instruction manual.
1. Isolatethecontrolvalvefromthelinepressure,releasepressure from both sides of the valve body, and drain the
process media from both sides of the valve. If using a power actuator, also shut off all pressure lines to the power
actuator,andreleaseallpressurefromtheactuator.Uselock-outprocedurestobesurethattheabovemeasures
stayineffectwhileyouworkontheequipment.
WARNING
The edges of a rotating disc have a shearing effect that may result in personal injury. To help prevent such injury, stay clear
of the disc edges when rotating the disc (figure 4).
11
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