Valve actuator
H series
Outline
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.
Features
- – 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.
Specifications
| Unit Size（N・m） | Maximum Output Torque | Unit Gear Ratio | Efficiency | Maximum Stem Diameter (mm) |
|---|---|---|---|---|
| H-25 | 390,000 | 59:1 | 0.35 | 300 |
| H-29 | 540,000 | 63:1 | 0.35 | 360 |
| H-35 | 830,000 | 65:1 | 0.35 | 460 |
※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 |
| H-29 | 1:2.94 | 0.9 | |
| H-35 | 1:4.46 | 0.9 | |
| Double Reducation Gearing | H-25 | 1:24.26 | 0.9 |
| H-29 | 1:24.26 | 0.9 | |
| H-35 | 1:24.26 | 0.9 |