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Check Valve

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refrigeration check valve

What is refrigeration check valve?

The refrigeration check valve refers to a valve whose opening and closing parts are circular discs and rely on its own weight and medium pressure to generate actions to block the back flow of the medium. It is an automatic valve, also known as check valve, one-way valve, return valve or isolation valve. The movement of the disc is divided into lift type and swing type. The lift-type refrigeration check valve is similar in structure to the stop valve, but lacks the valve stem that drives the valve disc. The medium flows in from the inlet end (lower side) and flows out from the outlet end (upper side). When the inlet pressure is greater than the sum of the weight of the disc and its flow resistance, the valve is opened. On the contrary, the valve is closed when the medium flows back. The swing type refrigeration check valve has a disc that is inclined and can rotate around the axis, and its working principle is similar to that of the lift type refrigeration check valve. The refrigeration check valve is often used as the bottom valve of the pumping device to prevent the backflow of water. The refrigeration check valve is used in combination with the shut-off valve, which can play a role of safety isolation.