Emerson Fisher 656- Installation Manual
Emerson Fisher 656– Installation Manual, read for free online in PDF format. We hope this helps you resolve any issues you may have. If you have further questions, please contact us through the contact form.
Table of Contents:
- Page 2 – Instruction Manual; Principle of Operation; Specifications; WARNING
- Page 3 – Maximum Pressure Limitations; Installation; Adjustment
- Page 4 – Maintenance; Disassembly
- Page 5 – Assembly
- Page 7 – Parts Ordering; Parts List; Handwheel Assembly
- Page 11 – Casing-Mounted Adjustable
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Fisher
r
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-Ball
t
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 Process Management sales office before
proceeding.
Instruction Manual
D100304X012
656 Actuator
August 2012
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Summary
Instruction Manual D100304X012 656 Actuator August 2012 2 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 ActuatorSizing (2) , Bar (Psig) Maximum Excess Diaphragm Pressure (1) ...
Instruction Manual D100304X012 656 Actuator August 2012 3 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 max...
Instruction Manual D100304X012 656 Actuator August 2012 4 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 i...
