The working principle and function of flow limiting check valve

Oct 12,2021

The flow-limiting check valve is installed at the outlet of the water pump. When a single pump is started and a non-full-design working pump is working, it will limit the flow of the working pump and make the pump work at a relatively high rate; prevent the motor from working at low head, large flow, and When the efficiency is low, an overload phenomenon occurs; it prevents the occurrence of the phenomenon of burning the motor with an over-rated current, and at the same time, it has an energy-saving effect. The check function of the flow-limiting check valve is equivalent to the micro-resistance slow-closing check valve, and there is no closing noise and zero backflow.
Flow-limiting check valve function: Flow-limiting function The valve is installed at the outlet of the water pump. When a single pump is started and a non-full design working pump is working, it will limit the flow of the working pump and make the pump work at a relatively high rate; prevent the motor When the pump has low lift, large flow and low efficiency. An overload phenomenon occurs; it prevents the occurrence of the phenomenon of burning the motor with an over-rated current, and at the same time, it has an energy-saving effect. The principle of current limiting is: according to the design working condition point head of the water pump, the pilot valve automatically detects and controls the actual working head of the water pump. To limit the working flow of the pump and limit the load of the motor. The valve sets a control working head. When the pump working head is lower than the control head, the valve will close the valve to increase the actual working head; when the pump working head is greater than the set head, the valve will be fully open and the valve will resist. The setting of the control head can be set according to the rated current of the motor, and can also be set according to the rate working condition, and the setting value of the working head of the valve is adjustable.

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