Check valves prevent backflow in a piping system. Also known as non-return valves or NRV, these mechanisms ensure that the valve closes if the fluid flow passing through the pipe reverses. Ensuring unobstructed flow, a check valve can automatically close when pressure decreases.
Since 1825, when the British Klux invented the balanced tank water meter, the development of water meters has nearly 200 years of history, and with the development of modern science and technology and intelligent water services, the types of water meters are becoming more and more diverse, so how many types of water meters are there today.
A good performing air valve should have the following characteristics: good flow characteristics, high durability, can be used in extreme weather conditions, effectively avoid leakage and injection, and still work properly under low-pressure operation.