
This actuator/accessory
package is designed to normally position the valve open. The
valve will close when compressed air is admitted into the upper
actuator chamber and the actuator spring will open the valve
when the air is exhausted.
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This actuator/accessory
package is designed to open the valve when compressed air is admitted
into the lower chamber and closes the valve when compressed air
is admitted into the upper chamber.
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This actuator/accessory
package is provided with a positioner to accurately throttle the
valve for pressure, liquid level, flow, temperature, and other
control requirements. A transducer is generally supplied to provide
valve modulation proportional to an electric signal (most often
4-20 ma).
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This actuator/accessory
package is designed to normally position the valve closed. The
valve will open when compressed air is admitted into the lower
actuator chamber and the actuator spring will close the valve
when the air is exhausted.
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