Emerson Fisher 377- User Manual
Emerson Fisher 377– User 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; Figure 2. Typical Fisher 377 Trip Valve; Specifications; Specifications for 377 trip valves are given in table 1.; Educational Services
- Page 3 – SST
- Page 4 – Declaration of SEP; However, the product; Figure 4. Maximum Trip Point Settings; Installation; WARNING
- Page 6 – Figure 6. Fisher 2625 Volume Booster used with 377L Trip Valve; Supply Pressure Requirements; value of the regulator is greater than
- Page 7 – Be sure all connecting tubing is free of foreign material.; CAUTION
- Page 8 – port to the bottom of the actuator cylinder.; Operating Information; Calibration
- Page 9 – Reset the control device for normal operation.; Principle of Operation; Figure 7 illustrates trip valve operation in the fail‐down mode.
- Page 10 – Figure 7. Fisher 377D Trip Valve Shown in Tripped Condition
- Page 11 – Figure 8. Fisher 377L Trip Valve Shown in Tripped Condition
- Page 12 – Figure 9. Fisher 377U Trip Valve Shown in Tripped Condition; Maintenance
- Page 13 – Periodic Operational Check; Isolate the actuator/valve assembly from the process loop.; Trip Valve Part Replacement Procedures
- Page 14 – set screw to remove all spring compression.; Replacing Stem/Plug Assembly Parts; Refer to the installation and calibration procedures.
- Page 15 – Parts Ordering; Parts Kits; Parts List; Table 2. Common Parts
- Page 18 – Fittings
- Page 19 – Figure 10. Trip Valve Assembly
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Fisher
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377 Trip Valve
Contents
Introduction
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Scope of Manual
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Description
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Specifications
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Educational Services
. . . . . . . . . . . . . . . . . . . . . . . . .
Installation
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Supply Pressure Requirements
. . . . . . . . . . . . . . . . .
Operating Information
. . . . . . . . . . . . . . . . . . . . . . . . .
Calibration
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Principle of Operation
. . . . . . . . . . . . . . . . . . . . . . . . .
377D Trip Valve
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
377L Trip Valve
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
377U Trip Valve
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Maintenance
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Periodic Operational Check
. . . . . . . . . . . . . . . . . . .
Trip Valve Part Replacement Procedures
. . . . . . . .
Replacing Diaphragms and Valve Plug Parts
. . . . .
Replacing Stem/Plug Assembly Parts
. . . . . . . . . . .
Parts Ordering
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Parts Kits
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Parts List
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 1. Fisher 377 Trip Valve Mounted on Size 130
585C Actuator
W8435‐1
Introduction
Scope of Manual
This instruction manual provides installation, operation, maintenance, and parts information for the Fisher 377 trip
valve. Refer to separate instruction manuals for information regarding the control valve, actuator, and accessories.
Do not install, operate, or maintain a 377 trip valve 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 of the contents of this manual, including all safety cautions and warnings.
If
you have any questions regarding these instructions contact your Emerson Process Management sales office before
proceeding.
Description
377 pressure‐sensing trip valves, shown in figures 1, 2, and 3, are for control applications where a specific
valve/actuator action is required when supply pressure falls below a specific point. When supply pressure falls below
the trip point, the trip valve cause the actuator to fail up, lock in the last position, or fail down. When the supply
pressure rises above the trip point, the 377 trip valve automatically resets, allowing the system to return to normal
operation. The trip valve can be top‐mounted on a manifold, yoke‐mounted, or bracket‐mounted to match the
application requirements. 377 trip valves are used with all types of piston actuators.
Instruction Manual
D200319X012
377 Trip Valve
July 2014
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Summary
Instruction Manual D200319X012 377 Trip Valve July 2014 2 Figure 2. Typical Fisher 377 Trip Valve W4292-1 Figure 3. Simplified Sectional View of Trip Valve UPPERDIAPHRAGM EXHAUSTPORT RESTRICTION PORT A PORT B PORT D PORT E PLUGASSEMBLIES PORT F PORT C VALVEPLUG SPRING SUPPLYCONNECTION LOWERDIAPHRAGM...
Instruction Manual D200319X012 377 Trip Valve July 2014 3 Table 1. Specifications Available Configurations 377 Trip Valve: Includes check valve, but no volume tank: user configured for locking position. For fielduse or replacement.When supply pressure falls below the trip point, 377D Trip Valve: Fai...
Instruction Manual D200319X012 377 Trip Valve July 2014 4 Table 1. Specifications (continued) Declaration of SEP Fisher Controls International LLC declares thisproduct to be in compliance with Article 3 paragraph3 of the Pressure Equipment Directive (PED) 97 / 23 /EC. It was designed and manufacture...
