... 8 " ~2" 3)Medium: LPG,natural gas,coal gas,firedamp 4)Pressure: 0-10bar 2W / 2S ... ~2 "2) Working Medium: air, water, oil, gas, LPG, natural gas,coal gas,firedamp3) Action Type: direct action4) ... 1/4G1 1/2G2Motion PatternGuide TypeWorking MediumAir,Water, OilTypeNormal Close TypeOperation Fluid Viscosity20CST BelowWorking Pressure2W ... 3.5Max. Pressure ResistanceAir 0~0.7, Water 0~0.5,Oil,0~0.5Operating ...