Actuators

[Shatru24]

I am using a actuator for actuating 2 ball valves, with a spring return feature, line pressure is 7 bar. After the supply is closed I need the ball valves to come back to its original position.

But there is still some pressure in the line between the solenoid and the actuator which I need to bleed for the springs in the actuator to release and allow the ball valves to come back to the original position.

Now Please suggest how will I be able to bring back the ball valves to original position without manually bleeding the air between the solenoid and the actuator??

 

[zdas04]

The normal way to do this is a 3-way valve that either sends gas to the actuator or vents the line from the valve to the actuator. Some reason you're not considering that?

David

 

[controlnovice]

3way solenoid valve in the air (or other gas) line to the actuator. When energized, it allows the air (or other gas) to the actuator. When de-energized, it stops air flowing into the actuator and allows the air from the actuator to 'escape'.

Standard design.

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This is normally the space where people post something insightful.

 

[ietech12]

I am assuming you are using a rack and pinion type actuator for on / off control. The three way valve is a standards practice for single port actuation. So the solenoid valve will have port 2 for air supply, port 1 for inlet supply to actuator and port 3 for the exhaust. when the solenoid is de-energized port 2 will close, port 1 will open to port 3 and exhaust the actuator side that is charged with air. when the solenoid is energized port 2 will open to port 1-charging the actuator with air. Port 3 will be blocked from port 1.

Regards,
Aldo

 

[prayogi]

Yup. use 3-way solenoide valve. It has a port as vent to release the pressure. But may be you have to install screen connector at this vent port to avoid the mud dauber insects build nestle in it.