ZK GB-off valve factory

Backwater to an automatic closing valve mounted on the boiler return water system pipe opening and closing valves, mainly to address the existing boiler return water and open and close manually open and close the valve can not open and close with the boiler circulating pumps, often causing The design of the boiler overflow problems. The method is mainly equipped in the body of the piston shaft, the shaft end of the piston, the lower end of the conical valve connected with the bottom of the conical valve spring. When the boiler circulating pump working piston downward movement by water pressure, the conical valve opens when the pump stops, the hot water loses pressure, valve cone rising valve closed, a fundamental solution to the boiler overflow problems.