Specifications

Brass Gas Ball Valve
*One leveler external thread
*Small Fluid resistance
*Simple structure, small cubage,and light weigh

 

  The backflow preventer is a kind of water control assemble installation to restrict water flow in sigle way.The fuction is prevent media flow back on pipeling,therefore,it can prevent the meidum from contamaination due to the backflow of the water.

   The operating principles is make use of reducing pressure as mechanical resistance when edia flow into flooding cheek vlave, and make the pressure close and media can flow regularly when pressure of diaphragm greater than force of spring and lower than 0,02MPA, otherwise,the pressure relief valve will be open autoatic and media can't flow.