Emerson Fisher 656 User manual

www.Fisher.com

Fisher™656 Diaphragm Actuator

Contents

Introduction 1.................................

Scope of Manual 1.............................

Description 1.................................

Principle of Operation 2.........................

Specifications 2...............................

Maximum Pressure Limitations 3................

Installation 3..................................

Adjustment 3..................................

Maintenance 4.................................

Disassembly 4................................

Assembly 5...................................

Parts Ordering 7................................

Parts List 7....................................

Handwheel Assembly 7........................

Casing‐Mounted Adjustable Down

Travel Stop 11..............................

Figure 1. Fisher 656 Actuator

W0454

Introduction

Scope of Manual

This instruction manual includes installation, maintenance, and parts information for Fisher 656 diaphragm actuators.

Refer to separate manuals for instructions covering the valve, positioner, and accessories.

Description

Fisher 656 actuators are long stroke, spring opposed, direct‐acting diaphragm actuators. They operate Vee‐Ballt

control valves, butterfly valves, built‐in turbine valves, louvers, dampers and similar equipment. They are suitable for

either push‐down‐to‐close (PDTC) or push‐down‐to‐open (PDTO) applications and are available in sizes 30, 40 and 60

to provide 54 mm (2.125 inch), 64 mm (3.5 inch) and 105 mm (4.125 inch) travel, respectively.

Do not install, operate, or maintain a 656 actuator 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 sales office or Local Business Partner before

proceeding.

Instruction Manual

D100304X012

656 Actuator

June 2017

Instruction Manual

D100304X012

656 Actuator

June 2017

Table 1. Specifications

Maximum Recommended Casing Operating

Pressure(1)

2.4 bar (35 psig)

Maximum Allowable Casing Pressure(2)

Actuator

Size

Maximum

Casing

Pressure for

Actuator

Sizing(2),

Bar (Psig)

Maximum

Excess

Diaphragm

Pressure(1),

Bar (Psig)

Maximum

Diaphragm

Casing

Pressure(2,3),

Bar (Psig)

30 8.6 (125) 1.0 (15) 9.7 (140)

40 4.5 (65) 0.69 (10) 5.2 (75)

60 2.8 (40) 0.69 (10) 3.4 (50)

1. Additional pressure may be added when the actuator is at full travel. If the Maxi

mum Excess Diaphragm Pressure is exceeded, damage to the diaphragm or dia

phragm casing might result. See the Maximum Pressure Limitation section.

2. Maximum diaphragm casing pressure must not be exceeded and must not produce

a force on the actuator stem greater than the maximum allowable actuator output

thrust or the maximum allowable stem load. See the Maximum Pressure Limitation

section.

3. This maximum casing pressure is not to be used for normal operating pressure. Its

purpose is to allow for typical regulator supply settings and/or relief valve tolerances.

Operating Temperature Range(3)

J-40 to 82°C (-40 to 180°F) with Nitrile Elastomer

J-40 to 149°C (-40 to 300°F) with Silicone

Diaphragm

Casing Pressure Connection

1/4 NPT internal

Maximum Travel

ACTUATOR SIZE

MAXIMUM RATED

STEM TRAVEL,

mm (INCHES)

Standard

Travel

Stop

Optional

Travel

Stop

30 54 (2.125) Not available

40 89 (3.5) 76 (3)

60 105 (4.125) 97 (3.8125)

Actuator Weight

Actuator Size

Approximate

Shipping Weight,

kg (Pounds)

30 23 (50)

40 32 (70)

60 73 (160)

Options

JTop‐mounted handwheel/adjustable travel stop

JCasing‐mounted adjustable down travel stop

1. Control and stability may be impaired if this pressure is exceeded.

2. Exceeding this pressure can cause damage to the diaphragm, diaphragm casing, or other parts.

3. The temperature limits in this manual and any applicable standard or code limitation for valve should not be exceeded.

Principle of Operation

In a direct acting diaphragm actuator, increasing loading pressure moves the actuator stem downward, compressing

the spring. When the diaphragm pressure is decreased, the spring moves the actuator stem upward. In the event of

failure of the loading pressure, the actuator stem moves to the extreme upward position.

Specifications

Refer to table 1 for Specifications of the 656 actuator. See the actuator nameplate for specific information for your

actuator.

WARNING

To avoid personal injury or damage to equipment that may result in the malfunction of the control valve or loss of control

of the process caused by excessive pressure, do not exceed the Maximum Pressures listed in table 1. Refer to the following

Maximum Pressure Limitations section.

Instruction Manual

D100304X012

656 Actuator

June 2017

Maximum Pressure Limitations

The casing and diaphragm of 656 actuators are pressure operated. This air pressure provides energy to compress the

spring, to stroke the actuator, and to seat the valve. The following explanations describe the maximum pressure limits

for an actuator. Refer to the nameplate or table 1 for maximum values for your actuator.

D Maximum Casing Pressure for Actuator Sizing: This is the maximum pressure that can be applied at less than full

travel of the actuator. If this stroking pressure is exceeded before the upper diaphragm plate contacts the travel

stop, damage to the stem or other parts might result.

D Maximum Excess Diaphragm Pressure: Additional pressure may be added when the actuator is at full travel. If the

Maximum Excess Diaphragm Pressure is exceeded, damage to the diaphragm or diaphragm casing might result.

Because the actuator has traveled its specified travel, and the diaphragm head is physically stopped from movement,

the energy from any additional air pressure is transmitted to the diaphragm and diaphragm casings. The amount of air

pressure that can be added once the actuator has traveled to the stops is limited by the resultant adverse effects that

may occur. Exceeding this limiting factor could result in leakage or casing fatigue due to the deformation of the upper

diaphragm casing.

D Maximum Diaphragm Casing Pressure: If the Maximum Diaphragm Casing Pressure is exceeded, damage to the

diaphragm, diaphragm casing, or actuator might result.

Installation

When an actuator and valve are shipped together, the actuator is normally mounted on the valve. Follow the valve

instructions when installing the valve and actuator in a pipeline. If the actuator is shipped separately, or if it is

necessary to mount the actuator on the valve, four holes have been tapped into the yoke boss to anchor it to a

mounting bracket.

WARNING

Always wear protective gloves, clothing, and eyewear when performing any maintenance operations to avoid personal

injury.

To avoid personal injury or property damage caused by bursting of pressure retaining parts, be certain the diaphragm

casing pressure does not exceed the limits listed in the Specifications table. Use pressure relieving or pressure limiting

devices to prevent the diaphragm casing pressure from exceeding these limits.

If installing into an existing application, also refer to the WARNING at the beginning of the Maintenance section in this

instruction manual.

To make the stem connection, follow the appropriate assembly step 10 in the Maintenance section. Standard actuator

sizes 30 and 40 have mounting holes tapped 3/8 inch UNC, and the size 60 mounting holes are tapped 1/2 inch UNC.

A 1/4 NPT loading pressure connection is located in the top of the upper diaphragm case. Using either pipe or tubing,

connect either the loading pressure connection or valve positioner input connection (if a valve positioner is furnished,

the loading pressure connection to the actuator will be made at the factory) to the output pressure connection on the

controller. Keep the length of the pipe or tubing as short as possible to avoid transmission lag in the control signal.

Adjustment

When the actuator is completely installed and connected to the controller, it should be checked for correct travel,

freedom from friction and correct PDTC or PDTO action.

Instruction Manual

D100304X012

656 Actuator

June 2017

The actuator spring and diaphragm have been selected to meet the requirements of the application. It should be

noted that the actuator spring has a constant rate of compression and that adjustment of the spring compression

merely shifts the initial spring setpoint up or down to make the actuator travel within the initial spring setpoint and the

maximum diaphragm pressure indicated on the nameplate.

In some instances, however, such as high friction butterfly and ball valves, the actuator will fully stroke with less

diaphragm pressure than indicated on the nameplate. To increase the pressure required to initiate actuator stem

movement, turn the lower bearing seat (key 14) up toward the spring case. To decrease the pressure at which

movement begins, turn the lower bearing seat down, away from the spring case.

Maintenance

WARNING

Avoid personal injury or property damage from sudden release of process pressure or uncontrolled movement 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 power 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 are working 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 plug.

D Check with your process or safety engineer for any additional measures that must be taken to protect against process

media.

Disassembly

1. If the actuator is installed on a control valve, isolate or bypass the control valve.

2. Shut off the diaphragm loading pressure and remove the pipe or tubing from the loading pressure connection in

the top of the diaphragm case.

3. Turn the lower bearing seat (key 14) down, away from the spring case to relieve all spring compression.

4. If the entire actuator is to be removed from its mounting, disconnect the actuator stem (key 10) from the stem

connector, clevis, etc., and remove the jam nuts (key 23). Loosen the cap screws that hold the yoke (key 9) to its

mounting plate or bracket, and lift the entire actuator from its mounting.

5. Remove the diaphragm case cap screws and nuts (keys 19 and 20) and lift the upper diaphragm case (key 1 ) off the

actuator. Remove the diaphragm (key 2).

6. Lift out the diaphragm plate (key 4) and stem (key 10). They may be separated by removing the cap screw (key 3).

Instruction Manual

D100304X012

656 Actuator

June 2017

Figure 2. Travel Stop Orientation for Size 60

11A0001‐A

MOUNTING BOSS

ON ACTUATOR YOKE

LOCATE FOUR TRAVEL

STOPS MARKED A

MOUNTING BOX

ON ACTUATOR YOKE

7. Take out the actuator spring (key 6).

8. The lower diaphragm case (key 5) can be removed from the yoke, if required, by loosening the travel stops and cap

screws (keys 7 and 8).

9. Remove the lower spring seat (key 11) and thrust bearing (key 13). Unscrew the lower bearing seat (key 14) from

the adjusting screw (key 12).

10. Remove the set screw (key 22) and remove the adjusting screw to complete disassembly.

Assembly

1. Apply lithium grease lubricant, or equivalent, to the adjusting screw threads (key 12) and screw this into the yoke

(key 9). Replace set screw (key 22). The set screw should engage the machined thread relief in the adjusting screw.

2. With the eared portion up, screw the lower bearing seat (key 14) all the way onto the adjusting screw.

3. Apply lithium grease lubricant, or equivalent, to the thrust bearing (key 13) and position it on the lower bearing seat

(key 14). Lay the lower spring seat (key 11) on top of the thrust bearing assembly.

4. Mount the lower diaphragm case (key 5) to the top of the yoke (key 9) using the travel stops and cap screws (keys 7

and 8). Alternate screws and travel stops on the sizes 30 and 40. See figure 2 for the correct orientation of the size

60.

5. Position the actuator spring (key 6) on the lower spring seat.

6. Attach the diaphragm plate (key 4) to the actuator stem (key 10) with the cap screw (key 3). Apply lithium grease

lubricant, or equivalent, to the stem. Place this assembly, actuator stem first, into the yoke with the actuator stem

through the spring adjustor (key 12).

7. Position the diaphragm (key 2) on the diaphragm plate (key 4) and align the holes with the lower diaphragm casing

(key 5). Attach the upper diaphragm case (key 1) to the lower diaphragm casing (key 5) using the cap screws and

nuts

(keys 19 and 20).

Note

When you replace actuator diaphragms in the field, take care to ensure the diaphragm casing bolts are tightened to the proper

load to prevent leakage, but not crush the material.

Instruction Manual

D100304X012

656 Actuator

June 2017

Note

Do not use lubricant on these bolts and nuts. Fasteners must be clean and dry.

a. The first four bolts tightened should be diametrically opposed and 90 degrees apart. Tighten these four bolts to

13 NSm (10 lbfSft).

b. Tighten the remaining bolts in a clockwise, criss‐cross pattern to 13 NSm (10 lbfSft).

c. Repeat this procedure by tightening four bolts, diametrically opposed and 90 degrees apart, to a torque of 27

NSm (20 lbfSft).

d. Tighten the remaining bolts in a clockwise, criss‐cross pattern to 27 NSm (20 lbfSft).

e. After the last bolt is tightened to 27 NSm (20 lbfSft), all of the bolts should be tightened again to 27 NSm (20

lbfSft) in a circular pattern around the bolt circle. Once completed, no more tightening is recommended.

8. If the actuator has been removed from its mounting, position it on its mounting plate or bracket, and secure with

cap screws.

9. Attach the pressure pipe or tubing to the loading pressure connection on top of the upper diaphragm case.

10. Attach the actuator stem to the stem connector or clevis and adjust the travel by using the appropriate procedure

below.

D For Push‐Down‐to‐Open applications:

1. Set the controlled element (valve plug, louver, damper, etc.) in the closed position.

2. Turn the lower bearing seat (key 14) up toward the spring case far enough to ensure that the actuator stem is at the

top of its stroke.

3. Make the actuator stem connection, making sure that there is full engagement of the actuator stem threads.

Tighten slightly.

4. Apply loading pressure to the diaphragm case to move the controlled element toward its wide open position. Screw

the controlled element linkage into the actuator stem connection far enough to move the controlled element

toward its closed position 3.2 mm (1/8 inch), and tighten the stem connection securely. This adjustment ensures

that the controlled element will close before the actuator stem travels to the top of its stroke. The travel stops (key

7) in the lower diaphragm case ensure correct travel of the controlled element in the open direction.

5. If travel starts at a lower or higher pressure than is required for proper operation, turn the lower bearing seat (key

14) up or down respectively, as described in the Adjustment section.

D For Push‐Down‐to‐Close applications:

1. Set the controlled element (valve plug, louver, damper, etc.) in the open position.

2. Turn the lower bearing seat (key 14) up toward the spring case far enough to ensure that the actuator stem is at the

top of its stroke.

3. Tighten the actuator stem connection slightly, making sure that there is full engagement of the actuator stem

threads.

4. Apply loading pressure to the diaphragm case and observe the travel of the controlled element to make sure that it

closes completely. If the travel is not correct, it can be changed by screwing the controlled element linkage in or out

of the stem connection. When the travel is set correctly, tighten the stem connection securely, and lock the jam

nuts (key 23).

5. If travel starts at a lower or higher pressure than is required for proper operation, turn the lower bearing seat in or

out respectively, as described in the Adjustment section.

Instruction Manual

D100304X012

656 Actuator

June 2017

Parts Ordering

When corresponding with your Emerson sales office or Local Business Partner about this equipment, refer to the serial

number found on the actuator nameplate.

WARNING

Use only genuine Fisher replacement parts. Components that are not supplied by Emerson Automation Solutions should

not, under any circumstances, be used in any Fisher valve, because they may void your warranty, might adversely affect the

performance of the valve, and could cause personal injury and property damage.

Parts List

Note

Contact your Emerson sales office or Local Business Partner for Part

Ordering information.

Key Description

1 Diaphragm Case, steel

Standard

2* Diaphragm, Nitrile

Size 30

Size 40

Size 60

3 Cap Screw, steel

4 Diaphragm Plate, cast iron

5 Lower Diaphragm Case, steel

6 Actuator Spring, steel

7 Down Travel Stop, steel Sizes 30 & 40 (3 req'd),

Size 60 (4 req'd)

8 Cap Screw, steel Sizes 30 & 40 (3 req'd), Size 60 (4 req'd)

9 Yoke, cast iron

10 Actuator Stem, steel

11 Lower Spring Seat, steel

12 Adjusting Screw, brass

13 Thrust Bearing, steel ball bearing

14 Lower Bearing Seat, steel

Key Description

17 Nameplate, SST

18 Drive Screw, SST (6 req'd)

19 Cap Screw, steel Size 30 (12 req'd), Size 40 (16 req'd),

Size 60 (24 req'd)

20 Hex Nut, steel Size 30 (12 req'd), Size 40 (16 req'd),

Size 60 (24 req'd)

21 Valve Stem, 316 SST (Size 30 only)

22 Set Screw, steel

23 Hex Nut, steel (2 req'd)

25 Warning Nameplate

Handwheel Assembly

51 Handwheel, cast iron

54 Jam Nut, steel

133 Stem, brass

135 Pusher Plate Assembly, steel

137 Jam Nut, steel

138* O‐ring, nitrile

Size 30 & 40

Size 60

139* O‐ring, nitrile

Size 30 & 40

Size 60

140 Groove Pin, steel

141 Cap Screw, steel Sizes 30 & 40 (6 req'd), Size 60 (8 req'd)

142 Handwheel body, cast iron

164 Body Extension, steel

171 Spacer, 416 SST (size 60 only)

*Recommended spare parts

Instruction Manual

D100304X012

656 Actuator

June 2017

Figure 3. Fisher 656 Size 30 Actuator

APPLY THREAD LOCKING ADHESIVE (HIGH STRENGTH) TO SURFACE A

CK1580

A0345‐1

Figure 4. Fisher 656 Size 40 & 60 Actuators

40A7798A

APPLY LITHIUM GREASE LUBRICANT ON SURFACES A & B

Instruction Manual

D100304X012

656 Actuator

June 2017

Figure 5. Typical Top‐Mounted Handwheel Assembly for Diaphragm Actuator, Size 30 & 40

LUBRICATE END OF STEM AND PLATE WITH LITHIUM GREASE

LUBRICATE STEM THREADS WITH ANTI‐SEIZE LUBRICANT

38A1209‐D

Instruction Manual

D100304X012

656 Actuator

June 2017

Figure 6. Typical Top‐Mounted Handwheel Assembly for Diaphragm Actuator, Size 60

LUBRICATE END OF STEM AND PLATE WITH LITHIUM GREASE

LUBRICATE STEM THREADS WITH ANTI‐SEIZE LUBRICANT

32B0262‐B

Table of contents

Other Emerson Controllers manuals

Emerson

Emerson F02/EPI2 User manual

Emerson

Emerson Tescom 44-2300 Series User manual

Emerson

Emerson REGAL 3F User manual

Emerson

Emerson Leroy-Somer R220 Instruction Manual

Emerson

Emerson unidrive m200 User manual

Emerson

Emerson Affinity User manual

Emerson

Emerson Fisher 585CLS User manual

Emerson

Emerson Dixell XC645D Wiring diagram

Emerson

Emerson Yarway Integral Strainerimpulse 400 Series Operation and maintenance manual

Emerson

Emerson Digitax ST User manual

Emerson

Emerson Bettis RTS User manual

Emerson

Emerson Dixell XRi30T Wiring diagram

Emerson

Emerson Fisher easy-Drive 200R User manual

Emerson

Emerson Keystone EPI2 User manual

Emerson

Emerson Level-Trol 2500 Series User manual

Emerson

Emerson Sempell series User manual

Emerson

Emerson Dixell IEV12D Wiring diagram

Emerson

Emerson Dixell XV300K Series Wiring diagram

Emerson

Emerson Fisher T205 User manual

Emerson

Emerson FISHER 67 User manual

Emerson

Emerson CBA730 Installation instructions

Emerson

Emerson Advantage 2.1 User manual

Emerson

Emerson Bettis 2000 Series E796 M2CP Manual

Emerson

Emerson Dixell Wing XW570L Wiring diagram

Popular Controllers manuals by other brands

Digiplex

Digiplex DGP-848 Programming guide

YASKAWA

YASKAWA SGM series user manual

Sinope

Sinope Calypso RM3500ZB installation guide

Isimet

Isimet DLA Series Style 2 Installation, Operations, Start-up and Maintenance Instructions

LSIS

LSIS sv-ip5a user manual

Rockwell Automation

Rockwell Automation 1769-L31 installation instructions

Airflow

Airflow Uno hab Installation and operating instructions

ABB

ABB ACS580-01 drives Hardware manual

Panasonic

Panasonic GM1 Series Reference manual

AutoAqua

AutoAqua Smart ATO micro SATO-120P manual

Panasonic

Panasonic FP? Positioning Unit RTEX Technical manual

Samson

Samson Type 5824 Mounting and operating instructions

Alpha IP

Alpha IP MIOB 21001 manual

Siemens

Siemens OpenAir GMA 1 Series Mounting instructions

Surecom

Surecom SR-629 user manual

Fishman

Fishman TriplePlay installation guide

Regulus

Regulus SRS1 T Installation and operation manual

3M MicroTouch EX113 reference guide