The PVC True Union Flanged Check Valve operates automatically, requiring no manual intervention. When the flow pressure exceeds the opening pressure, the valve flap opens, allowing the medium to pass through. If the flow reverses, the valve flap seals tightly against the body to block backflow. The greater the backflow pressure, the tighter the flap seals, ensuring complete closure and preventing backflow. The flanged design makes installation seamless with metal pumps and pipes.

This valve is widely used to prevent backflow, especially in systems like water pumps, where it prevents high-pressure water from flowing back into the pump. Sanking’s PVC True Union Swing Check Valve with flanged design offers more safety and reliability than traditional hemispherical or ball structures. It can be installed horizontally or vertically. Available sizes range from 1/2" to 2", with ANSI, JIS, and DIN options.