The overall size of the valve is comparable to a normal […]
The overall size of the valve is comparable to a normal check valve and consists of a main valve and an external accessory. Among them, the main valve includes a valve body, a pressure plate and a diaphragm, a large valve plate, a slow closing valve plate, a valve seat, a valve stem assembly and the like. The valve stem assembly of the slow-closing valve plate is connected with the pressure plate and the diaphragm, and the diaphragm is pressed between the valve cover and the diaphragm seat, and the up and down movement of the diaphragm drives the slow-closing valve to rise and fall. The valve stem passes through the center hole of the large valve plate, so that the large valve plate can slide along the valve stem within a certain range. In normal times, the large valve plate is pressed against the valve seat under the pressure of its own weight and the upper compression spring, so that the valve is closed. The external accessory of the multi-function water pump control valve is installed on both sides of the valve diaphragm and the inlet and outlet pipes of the valve. The control valve, the filter and a special counter-stop are installed on the connecting pipe of the lower chamber of the diaphragm and the inlet side of the valve. valve.
There is only a filter and a control valve on the connecting pipe of the upper chamber of the diaphragm and the water outlet side of the valve. The movement and position of the large valve plate and the slow-closing valve plate in the main valve determine the change of the working state of the valve and the opening and closing. The external fittings and pipelines of the valve transmit the pressure changes before and after the valve to the upper and lower chambers separated by the diaphragm, control the movement of the large valve plate and the slow-closing valve plate, and can change the large valve plate by adjusting the accessories. Slowly closing the operating speed of the valve plate, so that the opening and closing time of the valve is within the specified range.