... diaphragm Different ports and connections upon request For single stage oxygen pressure regulator:YQJ/YQJF-1: Input/ output pressure:≤15mpa/ ≤0 ... -25mpa/ 0-2.5mpa Flow rate:0.6m3/hNote:YQJ series for non- corrosive Gases such as H2,O2,N2,CO ... ,CH4,HE,NE,AR and etc. YQJF series for corrosive Gases such as NH3,SO2,H2S,HCL,NO ...