Concealed cut off valve - has built in pipe ventilator and return flow preventer with internally threaded seat

摘要

Concealed cut-off valve with a built-in pipe ventilator and return flow preventer where the seat for the ventilation body (16) is cylindrical to accept the cylindrical ventilation body which is secured from turning on the back side by two pins (18). The seat has an internal thread on the front side to screw in a holding put (10, 11, 12), which fixes the ventilation section in its seat. The ventilation body has a sealing ring and a fitting ring, which form a unit with the body. In addition it has a top flat which acts a valve seat for the valve (20).