H type valve actuator is a worm gear drive for quarter-turn operation, especially designed for the large sized butterfly valve. This actuator is equipped with a helical gear attachment (HGA) to reduce input shaft torque. Single reduction gearing is for motorized operation. Double reduction gearing is for manual operation.
- – This actuator is available for the manual operator attached with other manual operator, as well as a remotely controlled operator combined with motorized or pneumatic valve actuator.
- – The worm is of alloy steel and the worm gear is of high tensile strength bronze; therefore the H type valve actuator is very tough. Fluttering of a valve is minimized because of the least backlash of a high precision gear.
- – Every H type valve actuator has an adjustable and durable mechanical stop limit device, and it can be adjusted by ±5°at both ends of travel.
- – It has 3 unit sizes classified by output torque.
|Unit Size（N・m）||Maximum Output Torque||Unit Gear Ratio||Efficiency||Maximum Stem Diameter (mm)|
※Right hand worm is our standard.
H type valve actuator is equipped with a Helical Gear Attachment.
|Unit Size||HGA Gear Ratio||Efficiency|
|Single Reducation Gearing||H-25||1:2.94||0.9|
|Double Reducation Gearing||H-25||1:24.26||0.9|