... and the casting speed can be controlled by the hydraulic proportional valve.3.2 Holding furnace:The holding furnace is a metal ... : It is made of spray nozzle, high pressure windpipe, valve and so on.3.4 Tank(Atomization chamber): Actually it ... 7 Gas supply system: It consists of intelligent valve, pressure control valve, pressure-reducing valve, pressure sensor, high pressure hose and pressure indicator ...