1, automatic recirculation control valve includes recirculation flow pressure reduction facilities, so that the high pressure medium through many small diameter flow around, consume a lot of energy, and reduce the pressure.

2, the pump protection valve only has recirculation when the flow rate is very low, so that the pump is cooled, and the pump is running normally, and there is no recirculation, which can save the electricity and water energy consumed by continuous recirculation.

3, the automatic recirculation control valve does not require electrical wiring, nor does it require two regulating valves in series, one for regulation and the other for cutting. And the high speed flow line and erosion phenomenon easily produced by the high pressure system to minimize.

The medium enters the valve body through the valve inlet, and the spool is also the measuring part to feel the flow through. When the flow rate is less than the set value, the liquid is bypassed through the opening on the valve seat and through the valve stem which is also the decompression adjustment channel of the bypass spool. When the outlet flow is greater than the set flow, the fluid enters the main pipe and gradually closes the bypass for normal flow.