Check Valve

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 action to block the back flow of the medium. It is an automatic valve, also known as check valve, one-way valve, return valve or The main function of the isolation valve is to prevent the medium from flowing back, to prevent the pump and the drive motor from reversing, and to discharge the container medium.

The movement mode of the disc of the check valve is divided into lift type and swing type. The lift check valve is similar in structure to the shut-off valve, but lacks the valve stem that drives the 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 check valve has a disc that is inclined and can rotate around the axis, and the working principle is similar to that of the lift check valve.

The check valve is often used as the bottom valve of the pumping device to prevent the backflow of water. The combination of check valve and stop valve can play a role of safety isolation. The disadvantage is that the resistance is large and the sealing performance is poor when closed. 

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Lift Check Valve

Lift Check Valve

Lift Check Valve refers to the valve that automatically opens and closes the valve flap depending on the flow of the medium itself to prevent the medium from flowing back. It is also called check valve, one-way valve, reverse flow valve, and back pressure valve. Lift Check Valve is a check valve whose disc slides along the vertical centerline of the valve body. It can be divided into two types: vertical and horizontal. The connection form can be divided into three types: threaded connection, flange connection and welding.

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Swing Check Valve

Swing Check Valve

Swing Check Valve is also known as one-way valve or check valve. Its function is to prevent the medium in the pipeline from flowing back. It is mainly used in the pipeline where the medium flows in one direction. It only allows the medium to flow in one direction to prevent accidents. The Swing Check Valve produced by Milestone Valve Company is designed and manufactured in strict accordance with the GB12236 standard. The pin and valve disc link adopts a built-in structure with excellent performance and reliable sealing. It is widely used in various pipelines in the petroleum, chemical, pharmaceutical, and electric power industries.

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Flanged Check Valve

Flanged Check Valve

Flanged Check Valve refers to the flow of the medium itself and automatically open and close the valve disc, used to prevent the medium flow back.

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Durable Check Valve made in China can be specially customized from Milestone. Our factory is one of China Check Valve manufactures and suppliers in China. We can assure you that high quality Check Valve has one year warranty and passed CE certification. You don't worry about our price, we can give you our price list. When you see the quotation, you will find the price is cheap. Because our factory supply is in stock, you can buy the bulk of it with low price. We can also provide you with free samples. Looking forward to working with you.
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