The check valve also called non-return valve which only allows water, air, steam, or other medium flow one-way direction. The main functions of check valve includes 4 points.

To protect the pump or expensive equipment  from reverse  flow damage.

For the pipelines of the sewage system or desalination system, a check valve makes wastewater or osmosis sewage backflow into the system.

To maintain the pressure of the water system when the pumps shut off.

To prevent the discharge of the medium in the container.

Standard: API, DIN, JIS, GB, API 600, API 602, API 603, ANSI.

Material: Stainless Steel, Carbon Steel, Brass, Bronze, Alloy Steel, Titanium, 904l, Ductile Iron, Cast Iron Forged Steel, Cast Steel.

Size: 1/2"~28", DN15~DN800.

Pressure: 150LB~2500LB, PN10~PN420.

Type: Swing, Dual Plate, Wafer, Pressure Seal, Y Type, Flanged, Cryogenic, Low Temperature, Lift, Ball Type, Tilting Disc, Rubber Flapper, Lined, Non Slam, Silent, Vertical, Multifunctional, Sanitary.