升降貨梯液壓閥是利用閥芯在閥體內的相對運動來控制閥口的通斷及開口的大小，以實現壓力、流量和方向控制。液壓閥工作時，所有閥的閥口大小、閥進、出油口間的壓差以及通過閥的流量之間的關系都符合孔口流量公式(q＝KA·Δp m)，只是各種閥控制的參數各不相同而已。
Is the use of hydraulic lifts hydraulic valve spool relative movement in the valve body to control the on-off valve port and the size of the opening, in order to achieve pressure, flow and direction control. When the hydraulic valve job, port size of all valves, the valve inlet and outlet pressure difference between the oil and the flow through the relationship between the valve orifice flow equation are consistent with (q = KA · Δp m), just all kinds of valves parameter controls vary it.
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