wafer type double disc check valves

Wafer check valve is also known as reverse flow valve, check valve, back pressure valve and one-way valve. This type of valve is automatically opened and closed by the force generated by the flow of the medium itself in the pipeline. The valve used to prevent the backflow of the medium belongs to an automatic valve.
Its main function is to only allow the medium to flow in one direction and prevent the flow in the opposite direction.
, Prevent the reverse rotation of the pump and the drive motor, and the discharge of the container medium. Check Valves may also be used on lines supplying auxiliary systems where pressure may rise above system pressure. Check valves are used in piping systems,
The check valve is a valve that automatically opens and closes the valve flap depending on the flow of the medium itself, allowing the medium to flow in one direction, and plays an important role in protecting the pipeline machinery and equipment from water hammer damage. Usually, this kind of valve works automatically. Under the action of fluid pressure flowing in one direction, the valve flap opens; when the fluid flows in the opposite direction, the fluid pressure and the self-coincident valve flap of the valve flap act on the valve seat, thereby cutting off the flow. The working characteristics of the check valve are that the load changes greatly, the opening and closing frequency is small, and once it is put into the closed or open state, the applicable period is very long, and it does not require the movement of moving parts. But once there is a "switching" requirement, it must be flexible,
Wafer check valve, the valve body is cast iron or cast steel, and the valve disc can be made of metal, depending on the performance requirements. The disc can be of all-metal construction, in the form of a rubber pad or rubber ring inlaid on the disc holder, or with a synthetic overlay.
Choose different materials, can be applied to water, steam, oil, nitric acid, acetic acid, oxidizing medium, urea and other media.

Nominal pressure or pressure level: PN1.0-16.0MPa,
Nominal diameter or diameter: DN15~900,
Connection method: flange clip,
Applicable temperature: -196℃~540℃
Body Material: WCB, CAST IRON CF8(304) CF8M(316) CF3M(316L).
Disc Material: WCB, CAST IRON CF8(304) CF8M(316) CF3M(316L).