Hydraulic props require three-purpose valves to adjust the hydraulic system of the adjustable prop. The three-purpose valve can be a model, but it is not universal. Because the three-purpose valve is composed of one-way valve, safety valve and unloading valve.
Different hydraulic props have different heights and different bearing weights, and the pressure of the three-purpose valve is also different. Therefore, during the use of the three-purpose valve, the pressure value should be adjusted according to the use of the acrow prop to ensure that the hydraulic prop Under the premise of working, it can overflow when the pressure is overloaded.
Acrow prop under 2.0 meters require a pressure of approximately 38.2 zpa and 2.5 meters at approximately 32 zpa. The higher the adjustable prop, the lower the pressure. The same three-purpose valve can be used on acrow prop of different specifications by adjusting different pressure values. In other words, if the three-purpose valve is to be used universally, its pressure must be adjusted. Otherwise, the pillar will be damaged, or even dangerous.
