When the pump is switched on, the oil from the pump extends the cylinder. After full extension, the Check Valve (1) holds the load in place at which point the pump can be switched off. To lower the valve, the Solenoid Valve (3) is energized which opens the flow of oil to tank. The rate of lowering is adjusted by means of a Flow Control Valve (3). There is an inbuilt Relief Valve (4) for pump protection in case of a rise in pressure.
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Umbergaon, Valsad, Gujarat