Pneumatic Steam Control Valve(Water, Oil, Gas) Electric ... 500mm Best price and quality. Pneumatic Diaphragm Steam Control Valve(150Lb, 300Lb, 600lb,900Lb,etc) Features: ... Single Seated Control Valves, compact valve body, less component, esay to maintain.The mental valve plug is ... Diaphragm With nylon fabric nitrile rubber Springs 60Si2Mn Valve Stem 0Cr18Ni9, 2Cr13,304,316Ordering information When ...