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What is the difference between the drain type hydraulic control check valve and the inner drain type hydraulic control check valve
The function is the same, and the leakage type liquid control has 4 oil ports, XY, AB and XY, for the control oil port
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The difference between adjustable pressure relief valve and proportional pressure relief valve
According to the principle of reducing pressure and different types of structure, the water pressure reducing valve can be divided into adjustable valve and proportional pressure reducing valve. Different from the adjustable valve outlet pressure can be adjusted in a certain range, and can maintain the stability of the valve pressure unchanged. The outlet pressure of the proportional pressure reducing valve changes simultaneously with the change of the inlet pressure, and the pressure behind the valve cannot be adjusted, but the pressure before the valve maintains a fixed ratio.
Adjustable pressure reducing valve: according to the control principle of hydraulic differential or hydraulic pilot control (the main valve is controlled by relief pilot valves) principle, the outlet pressure value shall prevail, regulator valve opening and the flow to realize the outlet pressure of decompression and stability, and the correlation between the inlet pressure is lesser, can be adjusted by the spring device, to effectively adjust the relief valve outlet pressure.
Proportional pressure reducing valve: according to the difference in the sensing area between the inlet and outlet ends of the pressure reducing piston in the valve chamber, the pressure reducing valve with a proportional relationship between the inlet and outlet pressure can be realized, and the outlet pressure can be set according to the inlet pressure.
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How many damping holes does the hydraulic pilot relief valve have
Pilot relief valve has two damping holes, one is in the oil inlet through the pilot valve, to prevent the pilot valve spool suddenly open and close, the other is in the pilot valve main spool center hole, control the opening and closing of the main spool.