Flowserve V-378 R1 Edward Equiwedge Gate Valve - Manual (Page 29)

29
Flow Control Division
Edward Valves
Appendix A
(cont.)
TYPE (b) TORQUE ONLY
DISASSEMBLY PROCEDURE
Limitorque Illustration No.22
AUMA Illustration No.23
1. Position the valve gate just off the
seat.
2. Disconnect the electrical wiring to the
actuator.
3. Position a chain hoist of adequate
capacity to the actuator. The pull
point must be directly in line with the
valve stem.
4. Remove all nuts or cap screws from
under the flange.
5. Using a hoist, raise the actuator
above the yoke bushing and position
away. If the actuator is keyed to the
yoke bushing, remove the key so it
will not be lost.
If there is further work to do on the
valve, refer to the proper valve type and
proceed with disassembly.
CAUTION:
UPON REASSEMBLY OF A VALVE EQUIPPED
WITH AN ELECTRO-MECHANICAL
ACTUATOR, THE OPEN AND CLOSED LIMIT
SWITCHES MUST BE RESET. PLEASE REFER
TO THE MAINTENANCE MANUAL PRO-
VIDED BY THE ACTUATOR MANUFACTURER
FOR APPROPRIATE INSTRUCTIONS.
WARNING
SHOULD IT BECOME NECESSARY
TO CHANGE THE TORQUE SWITCH
SETTING FOR ANY REASON, YOUR
LOCAL EDWARD VALVES REPRESENTATIVE
SHOULD BE CONTACTED IN ORDER
THAT A CORRECT NEW SET CAN BE
OBTAINED FROM THE FACTORY.
The torque switch of the motor actuated
valve is set during factory assembly to
close the valve against the specified differ-
ential pressure and requires the same spe-
cial attention for resetting.
Illustration No. 20
Illustration No. 21
Illustration No. 23 Illustration No. 22
Torkmatic Manual Actuator
Auma Actuator
Limitorque Actuator Auma Actuator