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Check Valves

Check valve, also known as one-way valve or check valve, is automatically opened and closed by the force generated by the flow of medium itself in the pipeline, belonging to an automatic valve. The check valve is used in the pipeline system, its main function is to prevent the reverse flow of medium, prevent the pump and its driving motor from reversing, and discharge the medium in the container. The check valve can also be used to supply the auxiliary system in which the pressure may rise above the main system pressure.

Wafer

Wafer Type Lift Check Valve

The wafer type lift check valve is suitable for the working temperature of -196℃~540℃, to prevent backflow of medium. According different materials, the wafer type lift check valve can be applied to various medium, such as water, steam, oil, nitric acid, acetic, strong oxidizing medium and urea in petrochemical, metallurgy, electric power, light industry and food industries. Different from flange type lift check valve, the wafer type lift check valve has characteristics of short structure length, small volume, light weight, small water hammer pressure, convenient installation, etc.

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BS1868

BS1868 Lift Check Valve

The disc of BS1868 lift check valve is located on the valve seat sealing surface. And the disc can be free to move up and down, other parts is like a globe valve. When the fluid passes, the disc is lift from the seat sealing surface. When the fluid back flow, the disc falls back onto the seat and cut off the flow. Depending on the condition of using, the disc can be made of full metal construction, or be in rubber or rubber ring on the disc holder.

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Axial

Axial Flow Check Valve

Except of the general function of check valves, the axial flow check valve has is also designed with a shock-absorbing spring, which has the effect of silencing and shock-absorbing. It is convenient for users to check and repair on site. The unique axial flow structure has the characteristics of small flow resistance, large flow rate, and small size. It is the optimal valve for oil and gas pipeline network system, especially for oil pump outlets. It is suitable for pipeline of oil, gas and water slurry to prevent the medium from being used in countercurrent.

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Titling

Titling Disc Check Valve

The tilting disc check valve is a non slam check valve. Its main advantage is to overcome the impact and water hammer phenomenon caused by swing check valve and lift check valve, and realize non-impact operation.

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API

API 594 Single Disc Swing Check Valve

API 594 single disc check valve is mainly made of valve body, disc and spring. It can be installed horizontally or vertically on pipeline system, to prevent medium backflow. It is especially suitable for applications where the installation space is limited. This type valve is used in water, steam, oil, nitrate, and strong oxidizing media.

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API

API 594 Dual Plate Swing Check Valve

The API 594 dual plate swing check valve is used in pure pipelines and industrial, environmental protection, water treatment, building water supply and drainage pipelines, to prevent reverse flow of medium. This type valve adopts dual plate, and it is forcibly reset by the spring. The sealing surface can be welded wear material or rubber lining. It has characteristics of wide application range and reliable sealing.

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API

API 6D Swing Check Valve

The API 6D swing check valve is also called non-re valve. The function is to prevent the fluid in the pipeline back flow. Swing check valve is mainly used for the one-way flow of the medium, and only allowing the medium to flow in one direction to prevent accidents. Generally, this type of valves should be installed horizontally in the pipeline.

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