... is composed of air tank, safety valve, closing valves, ball valves, and pressure gauges ect.4 O2/N2 Separation ... buffer tank, flowmeters, dust filters, pressure regulating valve, throttle, and safety valve etc.6 Oxygen Compressed SystemThe Oxygen Compressed System ... , the status light, sound and light alarm fault instructions, purity display, driving pneumatic valve by setting procedures etc. Electrical ...