Electro-hydraulic valve actuator

rotarysingle-actingIP65

The accumulative type electro-hydraulic actuator manufactured by Zhonghuan is a driving device for the on-off control of valves (without opening degree adjustment); it is emission-free, fully enclosed, and high effective. As the actuator normally has a working pressure above 15 MPa, it has a more compact structure than a gas over oil actuator and single-acting pneumatic actuator of the same specification. The electro-hydraulic actuator not only has a faster operating speed of 10 times an electric actuator of the same output, but also more control functions such as ESD, pressure drop rate, PSH, PSL, and PST. The Zhonghuan electro-hydraulic actuator has unique technology, enabling it to inherit all the control logics of gas over oil actuators. Fully closed hydraulic pressure system After using the air filter for a period of time, water and solid particles accumulate in the oil, damaging its quality; as a result, some valve parts may wear down. This design with the oil cylinder open to the air requires the cylinder to be permanently vertical, otherwise, the oil will spill out. It is not convenient for transportation, and limits the installation direction of the actuator. This technology ensures that no air bubbles will be present in the hydraulic oil. There is little impact on the control valve during operation, with a system of high stability. As water or dust cannot enter the hydraulic system, it makes the system maintenance much easier and extends its service life.