Quarter Turn Gear Box

The unit are efficient , reliable , rugged and simple in construction . The   Housing is totally enclosed.

APPLICATION :
For the manual operation of pneumatic actuators / valves in event of electric or pneumatic failure.

FEATURES :
Suitable for direct mounting to most valves & actuators.
Readily adaptable to suit Rotary Actuators.
Can be field mounted into existing equipment.
Low rim pull.
Robust construction.
Self-locking Gear Unit which prevents Hand wheel spin-back  when used with spring return actuators.
Mountings as per ISO standard, without Locating Spigots, for   ease of mounting of various types of actuators.
Simple Declutching arrangement.
Clockwise input at the hand wheel to give clockwise output as seen from top.
Can be provided with Adaptor plates & Coupling pins at Valve & Actuator ends to meet specific requirements.

All the components are precisely machined from carefully selected materials. 

Bill Of Material 

FOR QUARTER TURN VALVES

( i.e. Butterfly valves, ball valves, Plug valves, Dampers etc.)

For these requirements, the movement of the valve stem is thru 90�. The large electrical actuators are multiturn type & there fore it is necessary to provide an intermediate quarter turn gear operator in between the valve & the actuator to achieve 90� rotation of the final control element.

Data to be supplied by customer :

1) Type & size of valve

2) Shaft dia. Of valve

3) Mounting flange details

4) Operating time in secs.

5) Type of duty

6) Output Torque required