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Hydraulic Actuator
1.Product Description
Our hydraulic actuators are divided into two types:one stroke and two stroke.it is mainly used as the control system on the valve for controlling the on and off of the valve.
2.The Composition and Structure
It is mainly composed  of the cylinder, piston (two-stroke) or spring(one-stroke), upper and lower cylinder cover, springs, seals and pressure relief devices and so on.
3.Working Principle
The working principle of two-stroke hydraulic actuator
The pressure compresses the piston and spring downward to drive the open or close of the gate.when you want to close or open the valve,the pressure goes into the lower piston through the selector valve and then drive the close or open of the gate.
The working principle of one-stroke hydraulic actuator
The pressure compresses the piston and spring downward to drive the open or close of the gate.when the pressure disappears ,the spring automatically reset back to the normal position.


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