I-Tork PDS Pneumatic Actuator
Installation and operating manual (PDS-M0108/1010)
I-TORK PDS PNEUMATIC ACTUATOR
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Scotch Yoke Principle & Adjustment;
I-Tork Actuators uses a Scotch Yoke assembly with angled slots.
This allows for a more compact design when compared to Rack & Pinion actuators.
Scotch-Yoke technology is known as the most suitable actuator mechanism for valve
and damper applications, as it produces higher torque at both ends (open and close)
positions compare to Rack and Pinion, which has a constant output torque. The
standard operation ambient temperature range is -20 ~ + 80
℃
.
Single Acting actuators have the pistons rotated 180° for a fail close position; this
means any adjustment will take place in the open position. If the SR actuator is set to
the ‘Fail Open’ position, then the adjustment will take place in the closed position. The
adjustment angle for both is ±3° by Adjusting Screws.
The adjustment is done by loosening the Adjusting Screws, and I-Tork PDS have 2
Adjusting Screws for open and close positions.
