1. Manuals
  2. Brands
  3. Emerson Manuals
  4. Controller
  5. Fisher 656
  6. Instruction manual

Emerson Fisher 656 Instruction Manual

Diaphragm actuator
Hide thumbs
Table of Contents

Advertisement

Quick Links

Instruction Manual
D100304X012
Fisher
656 Diaphragm Actuator
™
Contents
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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
proceeding.
www.Fisher.com
. . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . .
Figure 1. Fisher 656 Actuator
1
1
1
2
2
3
3
3
4
4
5
7
7
7
11
W0454
Emerson sales office
or Local Business Partner before
656 Actuator
June 2017

Advertisement

Table of Contents
loading

Related Manuals for Emerson Fisher 656

Summary of Contents for Emerson Fisher 656

  • Page 1: Table Of Contents

    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.

  • Page 2: Principle Of Operation

    Instruction Manual 656 Actuator June 2017 D100304X012 Table 1. Specifications Maximum Recommended Casing Operating Casing Pressure Connection Pressure 1/4 NPT internal 2.4 bar (35 psig) Maximum Travel Maximum Allowable Casing Pressure MAXIMUM RATED STEM TRAVEL, Maximum mm (INCHES) Maximum Maximum ACTUATOR SIZE Casing Standard...

  • Page 3: Maximum Pressure Limitations

    Instruction Manual 656 Actuator D100304X012 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.

  • Page 4: Maintenance

    Instruction Manual 656 Actuator June 2017 D100304X012 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.

  • Page 5: Assembly

    Instruction Manual 656 Actuator D100304X012 June 2017 Figure 2. Travel Stop Orientation for Size 60 MOUNTING BOSS ON ACTUATOR YOKE LOCATE FOUR TRAVEL STOPS MARKED A MOUNTING BOX ON ACTUATOR YOKE 11A0001‐A 7. Take out the actuator spring (key 6). 8.
  • Page 6 Instruction Manual 656 Actuator June 2017 D100304X012 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).

  • Page 7: Parts Ordering

    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.
  • Page 8 June 2017 D100304X012 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 APPLY LITHIUM GREASE LUBRICANT ON SURFACES A & B 40A7798A...
  • Page 9 Instruction Manual 656 Actuator D100304X012 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...
  • Page 10 Instruction Manual 656 Actuator June 2017 D100304X012 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...

  • Page 11: Casing-Mounted Adjustable Down Travel Stop

    Instruction Manual 656 Actuator D100304X012 June 2017 Figure 7. Casing‐Mounted Adjustable Down Travel Stop for Size 30 and 40 Actuators (Style 2) APPLY LUB BV8054-D Casing‐Mounted Adjustable Description 139* O‐Ring, nitrile Down Travel Stop (figure 7) Sizes 30, 34, & 40 Sizes 45, 46, 50, &...

  • Page 12: D100304X012 June

    Fisher and Vee-Ball are marks owned by one of the companies in the Emerson Automation Solutions business unit of Emerson Electric Co. Emerson Automation Solutions, Emerson, and the Emerson logo are trademarks and service marks of Emerson Electric Co. All other marks are the property of their respective owners.

Table of Contents