The check valve is installed in the pipeline system, and its main function is to prevent the medium from flowing back. The check valve is an automatic valve that depends on the pressure of the medium to open and close. Wafer check valve is suitable for various pipelines with nominal pressure PN1.0MPa~42.0MPa, Class150~25000; nominal diameter DN15~1200mm; working temperature -196~540℃ to prevent the medium flows back.
When the water valve is closed, there are different pressures at both ends of the check valve. In addition, the inertia when the water flow suddenly stops (is suddenly blocked), so that the check valve flaps quickly swing back and forth, causing the pipeline to produce a kind of rolling stone downhill. Until the pressure on both sides of the check valve is equal.
By selecting different materials, it can be applied to a variety of media such as water, steam, oil, nitric acid, acetic acid, strong oxidizing media and uric acid.