Purpose

The multifunctional water pump control valve is mainly installed on the outlet pipeline of water pumps in high-rise building water supply systems and other water supply systems. It prevents medium backflow, water hammer, and water hammering phenomena. The valve integrates the functions of an electric valve, check valve, and water hammer arrester, effectively improving the safety and reliability of the water supply system. It meets the requirements of mechanization and automation for water supply engineering equipment.

Product Diagram of JD745X Multifunctional Water Pump Control Valve

Features

1.Excellent water hammer elimination: Integrates the technical principles of slow opening, fast closing, and slow closing to eliminate water hammers, preventing water hammers during pump start and stop.

2.Convenient operation: Only requires operating the pump motor on/off button, and the valve automatically opens and closes according to pump operation procedures.

3.Good energy-saving effect: The valve body adopts a streamlined DC design, with low pressure loss, large flow, and small volume and light weight.

4.Dual-chamber transmission mechanism: Divided into two different pressure chambers, featuring stable water-stop closing without pressure fluctuations. Additionally, the entire transmission mechanism can be disassembled as a whole without removing the diaphragm, facilitating inspection.

Working Principle

The multifunctional water pump control valve consists of a main valve and a conduit control system. The main valve includes the valve body, valve cover, valve stem, large and small valve discs, diaphragm, and diaphragm pressure plate. The upper and middle valve covers, valve stem, diaphragm, diaphragm pressure plate, and small valve disc form an integrated dual-chamber transmission mechanism, divided by the diaphragm. The large valve disc slides up and down on the valve stem. The conduit control system includes ball valves, micro check valves, filters, and pipelines, connecting the main valve inlet to the lower chamber of the control room and the outlet to the upper chamber.

When the pump starts: The inlet pressure rises, and water flows through the ball valve (14), filter (13), and micro check valve (12) into the lower chamber, pushing the diaphragm pressure plate up to open the small valve disc. The large valve disc opens simultaneously with the small one under water flow, completing valve opening. Water in the upper chamber flows to the outlet through filter (10) and ball valve (6). The throttling effect of the micro check valve (12) slows the opening speed, ensuring the valve opens longer than the pump motor starts to avoid water hammers.

When the pump stops: The inlet pressure is lower than the outlet pressure. The large valve disc falls rapidly to close, cutting off about 90% of the flow. Outlet pressure water enters the upper chamber, pushing the diaphragm pressure plate down to close the small valve disc. Adjusting the ball valve (6) at the outlet controls the closing speed of the small valve disc to eliminate water hammers.