Pneumatic Steam Control Valve(Water, Oil, Gas) Electric or Pneumatic Type PN: ... -10Mpa DN:20-500mm Best price and quality. Pneumatic Diaphragm Steam Control Valve(150Lb, 300Lb, 600lb,900Lb,etc) Features:Top-guided ... structure, and the height reduce 30%, the weight reduce 30%. Parts Materilas Body, Bonnet ZG230-450, ZG0Cr18Ni9,304,316,WCB, WC6 ...