Contamination blocking valve
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Today I came across a new type of valve, the dirt-blocking valve. I have never seen this type of valve before, so I would like to ask what its working principle is, what its basic structure looks like, and where it is mainly used. It would be great if there could be pictures available. Thank you very much for your help
Hehe, the pollution-blocking valve you mentioned is the anti-pollution isolation valve. Pipe anti-fouling isolation valves are safety devices used to prevent backflow contamination in domestic drinking water pipes, thereby ensuring the hygiene and safety of such water. Product structure: The safety-type anti-fouling isolation valve is composed of a drain installed between two check valves. The upper chamber of the drain is connected to the inlet end of the primary check valve using a high-pressure hose. First, the primary and secondary check valves are mainly composed of a valve body, a valve cover, valve discs, gaskets, springs, etc. The drain valve is mainly composed of a valve body, valve cover, diaphragm, valve disc, sealing plate, valve core, valve seat, spring, etc. The standard anti-fouling isolation valve is composed of two check valves connected in series. Working principle: The anti-fouling isolation valve consists of two check valves connected in series; when the seal of one of them is damaged, the other still provides sealing to prevent backflow. However, once the seals of both check valves are damaged at the same time, they lose their check function; their safety and reliability are relatively lower, and their working principle is quite simple. The anti-fouling isolation valve features a drain device added in the middle, based on the standard design; this allows it to prevent backflow contamination even if the seals of both check valves are damaged at the same time.
What I saw on site were two Y-shaped filters, with a check valve placed in between. So what type of valve is that?