Drain valve

The filter is mainly used to filter impurities in water, the specific principle is as follows: after the filter is connected to the pipeline system, water enters the filter from the lower water inlet, the water after filtering impurities flows out from the outlet, when the impurities in the water pass through the mesh core, because the volume is larger than the mesh core hole, and the vent is cut off in the mesh core, when the accumulation to a certain number, that is, the water inlet and outlet have a certain pressure difference. When the pressure difference between the inlet pressure gauge and the outlet pressure gauge of the filter screen increases to a specified value (the pressure difference of the filter screen with different precision diameters is different, generally 0.15 MPA) , open the discharge valve and put it into operation, when the pressure difference between inside and outside is restored to normal, the discharge valve will be closed to complete the process of filtrating and discharging