What is the difference between spring return and non-spring return actuators?

Spring Return actuators utilize an internal spring that drives the actuator open or closed on loss of power. Non-Spring return actuators stay in their current position on loss of power.

What is non-spring return valve?

A non-spring return valve requires pressure to open or close the valve. In the absence of pneumatic pressure the valve remains in the last position that was selected. A spring return valve requires pressure in one direction and a release of pressure in the other direction.

What is spring return valve?

Also known as a single-acting valve, a spring return works by having a supply of air or liquid on only one side of the piston. When the media fills the piston, the valve opens or closes. Then, when the supply is cut off, a spring mechanism removes the media and reverses the valve position.

Which way does a non-return valve go?

A non-return valve allows a medium to flow in only one direction and is fitted to ensure that the medium flows through a pipe in the right direction, where pressure conditions may otherwise cause reversed flow.

What is the difference between a single and double acting actuator?

Single action is a control valve that is driven by the air output of the control valve positioner on one side (side open or close) while the other side is moved with the aid of a spring or a membrane. The double acting actuator is the actuator that only use piston as its element to operate the valve.

What does spring return mean in actuator?

A spring return (aka single) actuator provides power with the use of spring force. Air or liquid is dispersed in one direction to push or pull the piston. This action controls whether the valve will open or close. For example, a spring return actuator would be good for clamping.

What does spring return mean?

A spring return (aka single) actuator provides power with the use of spring force. Air or liquid is dispersed in one direction to push or pull the piston. This action controls whether the valve will open or close.

What is spring return actuator?

A spring return actuator allows the ability to remotely control a device, which is often required to adhere to safety standards. If the actuator loses power, air supply, or hydraulic pressure, the springs expand and return the actuated component to its original position, known as the fail position.

What is the difference between single acting and double acting actuator?

How the valve spring works to close the valve?

The valves are fitted in the port at the cylinder head by use of a strong spring. This spring keeps them closed. Each valve within the cylinder head has at the least one spring. The valve spring exerts stress against the valve retainer to maintain the valve closed.