Samson EB 31a-23, Монтаж и эксплуатация

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3-2
EB 31a-23_EN
Edition: November 2021
Speci fi cations subject to change
Design and principle of operation
3.3.1 HCD hydraulic circuit operating func-
tion
For adjust the stroking time there are two speed control valves:
one valve regulates the opening rotation and the other valve the
closing rotation.
3.3.2 How to adjust the operating time (for
standard rotation - CW to Close top
view)
Fig. | 3-4: Speed control valve
Fig. | 3-5: Quarter-turn actuator HCD
Stroke Adjustment time in opening rotation
Ö
Unscrew the knob safety blocking screw of the speed control
valve (1) (right position from top view)
Ö
Open or close the speed control valve until the desired stroke
time rotation is achieved
Ö
Make rotation test to verify the correct stroke time in opening
rotation. Repeat the previous steps if necessary
Ö
Once the desired operating time is achieved tighten the safe-
ty blocking screw to lock the knob in place.
Stroke Adjustment time in closing rotation
Ö
Unscrew the knob safety blocking screw of the speed control
valve (2) (left position from top view)
Ö
Open or close the speed control valve until the desired stroke
time rotation is achieved
Ö
Make rotation test to verify the correct stroke time in closing
rotation. Repeat the previous steps if necessary
Ö
Once the desired operating time is achieved tighten the safe-
ty blocking screw to lock the knob in place.
3.3.3 Pneumatic / Hydraulic circuit scheme
Spring return
Fig. | 3-6: Pneumatic / Hydraulic circuit scheme SRP HCD (Top view)
Double acting
Fig. | 3-7: Pneumatic / Hydraulic circuit scheme DAP HCD (Top view)