Instruction Manual
D200319X012
377 Trip Valve
August 2012
3
Figure 2. Typical Fisher 377 Trip Valve
W4292-1 / IL
Figure 3. Simplified Sectional View of Trip Valve
UPPER
DIAPHRAGM
EXHAUST
PORT
RESTRICTION
PORT A
PORT B
PORT D
PORT E
PLUG
ASSEMBLIES
PORT F PORT C
VALVE
PLUG SPRING
SUPPLY
CONNECTION
LOWER
DIAPHRAGM
W4303‐1 / IL
Specifications
Specifications for 377 trip valves are given in table 1.
Educational Services
For information on available courses for 377 trip valves, as well as a variety of other products, contact:
Emerson Process Management
Educational Services, Registration
P.O. Box 190; 301 S. 1st Ave.
Marshalltown, IA 50158-2823
Phone: 800-338-8158 or
Phone: 641-754-3771
Fax: 641-754-3431
e‐mail: education@emerson.com
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