Structure and working principle of anti-pollution cut-off valve

Anti-fouling cut-off valve: Installed in various types of piping systems to strictly prevent the back flow of the media, to protect the subsequent media or equipment from contaminated non-return valves. Consists of two series-connected check valves and transition sections that are tightly sealed to ensure that there is no back flow in the media.

Pipeline anti-fouling cut-off valve is a safety device for preventing back-flow pollution in drinking water pipelines to ensure the hygiene and safety of drinking water.

Structure: The safety type anti-fouling cut-off valve is composed by adding a drain between two check valves. The upper drain chamber is connected to the inlet end of the primary check valve with a high pressure hose. First, the two-stage check valve is mainly composed of a valve body, a valve cover, a valve flap, a gasket, and a spring. The drain is mainly composed of a valve body, a valve cover, a diaphragm, a valve flap, a sealing plate, a valve core, a valve seat, and a spring. Ordinary anti-soiling partition valve is made up of two check valves in series.

Working principle: The anti-fouling partition valve is made up of two check valves connected in series. When one of the seals is broken, the other seals to prevent backflow. However, when the two check valve seals are destroyed at the same time, they lose the check-return function, and their safety and reliability are relatively poor, and the working principle is relatively simple. The anti-pollution cut-off valve is provided with a drain in the middle of the common type, so that even if the two check valves are sealed and destroyed at the same time, they can also play a role in preventing back-flow pollution.