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What is a minimum flow valve
How the minimum flow valve works

What is a minimum flow valve
The minimum flow valve, also known as the automatic recirculation valve, is a pump protection valve installed at the outlet of the feed pump to prevent damage to the feed pump due to overheating, severe noise, instability and cavitation when it is operating below load . As long as the flow rate of the feed pump is lower than a certain value, the bypass return port of the valve will automatically open to ensure the minimum flow required by the liquid feed pump.
working principle
The minimum flow valve is connected to the outlet of the pump. Like the check valve, the valve flap is opened by the thrust of the medium. When the pressure of the main channel remains unchanged, the flow rate of the main channel is different, and the opening of the valve flap is different. The flap will be determined at a certain position, and the flap of the main circuit will transmit the action of the main flap to the bypass through a lever to realize the switch state of the bypass.