A check valve, also known as a non-return valve or one-way valve, is a mechanical device designed to allow fluid (liquid or gas) to flow in only one direction while preventing reverse flow (backflow) in a system. It operates based on the pressure of the fluid within the system. When fluid flows in the intended direction, it pushes against a movable part, such as a disc, ball, or diaphragm, within the valve. This action opens the valve, allowing the fluid to pass through. If the fluid attempts to flow in the reverse direction, the pressure drops, causing the movable part to close and seal off the flow path. This mechanism is powered by the fluid itself, eliminating the need for an external power source.
Size:DN80-300
Pressure:PN10-16、Class150
Material: cast iron ,CF8/304, copper