HP Series Pneumatic Actuator
Installation Operation & Maintenance Manual
Document No. HUMG-HP-16 Rev0
Page 9 / 18
3.1.4.
The valve output shaft must be in lined with the actuator output drive to avoid side-
loading the shaft. To avoid any backlash, flexibility in the mounting bracket or mounting
should not be allowed.
3.2.
Operating Pressure and Method
3.2.1.
The maximum operating Air supply pressure should not exceed 8 bar (115psi). The air
supply should be clean, dry and lubricated.
3.2.2.
CAUTION:
Before using an alternative air supply that is not of instrument quality, please
consult with HKC Co., Ltd.
3.3.
Principles of Operation
3.3.1.
Air connections double acting
OPEN
Air to port 2 : counter clockwise/open
CLOSE
Air to port 4 : clockwise/close
* Pistons must be inverted to reverse actuator rotation
3.3.2.
Air connections of spring return
Spring to Close
Air to port 2: counter clockwise / open
Spring return: clockwise / close
