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Gas over oil actuator

Wegman valves offers various gas over oil actuators:​
Usually end users have a preference for a certain brand of actuators, we work together with all major manufacturers and can offer any desired brand.​

Wegman Valves ledeen oil over gas actuator

The design is based on a hydraulic scotch yoke actuator.​
The (natural) gas from the pipeline is not directly used in the actuator but hydraulic fluid is used as an intermediate or transfer to the actuator.​
A typical set up includes a high pressure control assembly, hand pump assembly, gas over oil tanks and the hydraulic actuator. The actuator can be single or double acting.​

An alternative is direct gas actuator where the gas operates the pneumatic actuator directly.​
For example:​
Rotork, Biffi, Ledeen