Instruction Manual
D100306X012
657 Actuator (30/30i-70/70i and 87)
June 2018
6
Accurate adjustment to the bench set range can be made during the actuator mounting process by making the
adjustment before the actuator is connected to the valve (see the Spring Verification procedure).
Figure 4. Bench Set Adjustment
SPRING ADJUSTER
LOWER BENCH SET
LOADING PRESSURE
UPPER BENCH SET
PRESSURE MARK
VALVE
STEM
RATED VALVE
TRAVEL MEASURE
MARK
VALVE
STEM HERE
UPPER BENCH SET
LOADING PRESSURE
ACTUATOR STEM
NOTES:
THE LOWER PSIG LOADING PRESSURE (MARKED ON NAMEPLATE) WHERE THE FIRST MOVEMENT OF
ACTUATOR STEM IS DETECTED.
THE UPPER PSIG LOADING PRESSURE EXTENDS ACTUATOR STEM.
MARK THIS POINT WITH TAPE OR A MARKER.
MEASURE DISTANCE OF TRAVEL. IT SHOULD EQUAL THE TRAVEL SPAN SHOWN ON THE NAMEPLATE.
2
3
1
3
4
40A8715-B
B2426
1
2
3
4
Spring Verification
Note:
Some spring compression is required to move the diaphragm to the top of its travel.) The steps provided are the same
for push-down-to-close (direct acting) or push-down-to-open (reverse acting) valves.
WARNING
When moving the actuator stem with diaphragm loading pressure, use caution to keep hands and tools out of the actuator
stem travel path. Personal injury and/or property damage is possible if something is caught between the actuator stem and
other control valve assembly parts.
Also, provide a certified pressure gauge suitable to accurately read the diaphragm pressure from 0 through 0.3 bar (5
psig) above the upper operating range pressure marked on the nameplate. Apply loading pressure to the diaphragm.
