Four-column hydraulic press pressure control valve introduction

The four-column hydraulic pressure control valve is a valve used to adjust and control the oil pressure in the hydraulic system. According to their different functions and uses, pressure control valves can be divided into relief valves, pressure reducing valves, sequence valves, pressure relays, etc. Their common feature is to use the principle of the balance between the hydraulic force on the valve core and the spring force. Work.

There are two main purposes of the relief valve of the four-column hydraulic press: one is to keep the pressure of the system or circuit constant, for example, it is used as an overflow constant pressure valve in the throttling speed control system of a quantitative pump to keep the outlet pressure of the pump constant; Second, it is used as a safety valve in the system. When the system is working normally, the overflow valve is in a closed state, and when the system pressure is greater than or equal to its set pressure, the overflow valve opens to overflow, which acts as an overload protection for the system. . In addition, the relief valve can also be used as a back pressure valve, unloading valve, brake valve, balance valve and speed limit valve. According to their different structures, relief valves can be divided into two types: direct-acting and pilot-operated.

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