Emerson 667 Instruction manual Download

Transcript
Instruction Manual
667NS Actuator
D102603X012
November 2012
Fisherr 667NS Diaphragm Actuators
Size 40, 45, 70, and 80
Contents
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Scope of Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Educational Services . . . . . . . . . . . . . . . . . . . . . . . . .
Maximum Pressure Limitations . . . . . . . . . . . . . . . . . .
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Actuator Mounting . . . . . . . . . . . . . . . . . . . . . . . . . .
Direct-Acting
(Push-Down-to-Close) Valves . . . . . . . . . . . .
Reverse-Acting
(Push-Down-to-Open) Valves . . . . . . . . . . . .
Loading Connection . . . . . . . . . . . . . . . . . . . . . . . . . .
Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Travel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1
1
1
3
3
3
4
5
5
6
8
9
9
Spring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Discussion of Bench Set . . . . . . . . . . . . . . . . . . . 9
Adjustment Steps . . . . . . . . . . . . . . . . . . . . . . . 10
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Replacement of the Elastomeric Parts . . . . . . . . . . 12
Size 40, 45, and 70 Actuators . . . . . . . . . . . . . 12
Size 80 Actuators . . . . . . . . . . . . . . . . . . . . . . . 13
Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Size 40, 45, and 70 Actuators . . . . . . . . . . . . . 14
Size 80 Actuators . . . . . . . . . . . . . . . . . . . . . . . 14
Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Size 40, 45, and 70 Actuators . . . . . . . . . . . . . 15
Size 80 Actuators . . . . . . . . . . . . . . . . . . . . . . . 16
Parts Ordering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Introduction
Scope of Manual
This manual provides installation, maintenance, and parts list information for the Fisher 667NS actuator. Refer to
separate instruction manuals for information regarding the control valve and accessories.
Do not install, operate, or maintain 667NS actuators 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 667NS actuator is a reverse-acting, spring-opposed diaphragm actuator that is used for operation of automatic
control valves. The 667NS actuator yoke construction and special bonnet-to-yoke bolting provides a high structural
resonant frequency that exceeds most nuclear service seismic requirements.
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