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Description

HDM De-clutchable wormgear offers simple and reliable manual positioning of the valves, dampers and others quarterturn
devices when overriding existing pneumatic, electric or hydraulic quarter-turn actuators. All unit are suitable for both
indoor and outdoor installation. The modular design is to provide the most efficient and effective solution to a full range of manual
overriding requirements.


Operation

To engage manual operation, first pull out the lock handle and then rotate the clutch lever in anti-clockwise direction until
engagement takes place. To return to automatic mode, first pull out the lock handle and then rotate the clutch lever in clockwise
direction until engagement take place.


Material 

No.

Name

Material

1

Shaft

45# Steel

2

Seal Ring

EPDM

3

Snap Spring

Spring Steel

4

Upper End Cap

Aluminium Die Casting

5

Screw

304

6

Pull Rod

304

7

Body

Aluminium Die Casting

8

Seal Ring

EPDM

9

Gear

QT500

10

Reducing Sleeve

QT400

11

Worm

QT400


Specification

Model

Pneumatic Actuator Cyilinder diameter Double Acting

Pneumatic Actuator Cyilinder diameter Single Acting

HDM-1

HPA-52DAHPA-92DA

HPA-52SRHPA-92SR

HDM-2

HPA-92DAHPA-105DA

HPA-83SRHPA-105SR

HDM-3

HPA-125DAHPA-160DA

HPA-105SRHPA-125SR

HDM-4

HPA-190DAHPA-210DA

HPA-140SRHPA-160SR

HDM-5

HPA-240DA

HPA-190SRHPA-210SR

HDM-6

HPA-270DAHPA-300DA

HPA-240SRHPA-270SR


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