Key Advantages of the Multifunctional Pump Control Valve:

(1)No manual operation required. Utilizes the pressure differential across the valve during pump start/stop cycles as the control force, enabling automatic opening and closing in tandem with pump operation.

(2) Effectively prevents accidents caused by elevated water hammer pressure waves during valve operation. Field surveys and measurements confirm that peak water hammer pressure during pump shutdown remains below 1.3 times the working pressure.

(3) Requires no on-site commissioning and accommodates a wide range of operating conditions.

(4) Virtually maintenance-free. Replacing three valves with one significantly reduces maintenance workload.

(5)　Low pressure loss. Featuring a streamlined, wide-body design, pressure loss is reduced by over 50% compared to similar foreign products. For example, at an economical flow velocity of v=2m/s, the pressure loss of the DN200 multi-functional pump control valve is 0.7m, whereas comparable foreign products exhibit 1.5m.

Structure and Working Principle of the Multi-Functional Pump Control Valve

2. Working Principle:

1) Before pump startup, pressure at the valve outlet acts on the main valve plate, keeping the valve closed. Simultaneously, the upper chamber of the diaphragm controller connects to pressurized water, while the lower chamber communicates with the low-pressure inlet side of the valve.

2) After pump startup, inlet pressure gradually increases. Concurrently, pressurized water slowly enters the lower chamber of the diaphragm controller through the inlet connection pipe, causing the main valve plate to open gradually. The opening speed can be adjusted via the control valve.

3) When the pump stops, the inlet pressure decreases. As flow approaches zero, the main valve plate rapidly closes under its own weight. Due to the reduced inlet pressure, pressurized water from the outlet enters the upper chamber of the diaphragm controller via the connecting pipe. Water from the lower chamber is forced back to the inlet through the inlet connecting pipe, causing the slow-closing valve plate to close gradually. The slow-closing duration can be adjusted via the control valve. The rapid closure of the main valve plate and the slow closure of the slow-close valve plate follow a two-stage closing pattern, effectively eliminating water hammer.

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