Pneumatic Steam Control Valve(Water, Oil, Gas) ... Electric or Pneumatic Type PN:1.6-10Mpa DN:20-500mm Best price and quality. Pneumatic Diaphragm Steam ... Control Valve(150Lb, 300Lb, 600lb,900Lb,etc) Features ... Diaphragm With nylon fabric nitrile rubber Springs 60Si2Mn Valve Stem 0Cr18Ni9, 2Cr13,304,316Ordering information When ...