SHARED VALVE UNIT WITH AUTOMATIC SWITCH OF GAS SOURCES ACCORDING TO THE INPUT PRESSURES OF DIFFERENT GAS SOURCES WITH NO NEED TO CHANGE THE NOZZLE

摘要

A shared valve unit with automatic switch of gas sources according to the input pressures of different gas sources with no need to change the nozzle includes a housing, a differential pressure component and two nozzles, said housing configured with a chamber and a gas flow passage, a gas inlet passage, communicated with the inlet end of said chamber and gas flow passage, a gas outlet passage, communicated with the outlet end of said chamber and gas flow passage, said differential pressure component configured inside said chamber, including a differential pressure diaphragm and a controlling device configured on said differential pressure diaphragm, with its one end configured with a sealing block to seal the gas outlet passage, an elastic component, abutting between one end of said housing and said differential pressure diaphragm, said two nozzles having different diameters, respectively preinstalled inside said gas flow passage and on the outlet end.