Emerson Fisher 785C Instruction Manual page 17

Instruction Manual
D104483X012
Figure 13. Handpump Schematic: Fast Stroke MHQ Handpump for 785C Spring Return Rod Retract (Fail Up),
Single- or Double-Acting
PNEUMATIC REMOTE CONTROL TO CLOSE
PRESSURIZED PERMANENTLY THE PNEUMATIC SUPPLY LINE.
PNEUMATIC REMOTE CONTROL TO OPEN
DE-PRESSURIZED THE PNEUMATIC SUPPLY LINE.
EMERGENCY MANUAL OPERATION
IN CASE OF PNEUMATIC SUPPLY FAILURE, CLOSE THE STOP VALVE
351B, SELECT BY THE VALVE "5-D" THE CLOSING OPERATION AND
ACTUATE THE HAND PUMP "5-P".
AT THE END OF THE CLOSING OPERATION CLOSE THE VALVE 351A.
NOTE: THE VALVE "5-D" MUST BE IN "REMOTE CONTROL" POSITION
AND THE STOP VALVES 351A AND 351B MUST BE OPEN TO ALLOW
THE OPERATION WITH PNEUMATIC SUPPLY.
1 SINGLE-ACTING SPRING RETURN PNEUMATIC LINEAR ACTUATOR
3 HYDRAULIC CYLINDER
5 MANUAL OVERRIDE
R — RELIEF VALVE
P — HAND PUMP
D — HAND OPERATED DIRECTIONAL CONTROL VALVE
351 STOP VALVE
395 RELIEF VALVE
785C Actuator
May 2022
PNEUMATIC SUPPLY
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