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  • Die & Mould India International Exhibition

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Product : Overcentre valves

Overcentre valves

Al - Ameen Enterprises

 Overcentre valves give static and dynamic control of loads y regulating flow into and out of hydraulic actuators. The overcentre valve will stop the load from running away in the event of a hose burst. If open centre directional control valves are used, they will allow the thermal expansion relief of the hydraulic fluid. These valves provide excellent hose burst protection. The check section allows free flow into the actuator (from 2 to 1) then holds and locks the load against movement  (from 1 to 2). The pilot pressure in the pilot port (3) will give a controlled movement to piston when the pressure is  applied. The pressure required to open the valve and allow movement depends on the pilot ratio of the valve. For optimization of load control and energy usage, a choice of pilot ratios can be made available. The pressure required to open the valve and start actuator movement can be calculated as follows:Pilot Pressure = (Relief Setting) - (Load Pressure) Pilot Ratio.

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