... .6-10Mpa DN:20-500mm Best price and quality. Pneumatic Diaphragm Steam Control Valve(150Lb, 300Lb, 600lb,900Lb,etc) Features ... structure, and the height reduce 30%, the weight reduce 30%. Parts Materilas Body, Bonnet ZG230-450, ZG0Cr18Ni9,304,316,WCB, WC6 ... PTFE, Flexible Graphite Bellows 0Cr18Ni9,304 Gasket A3. 0Cr18Ni9 ,304 Diaphragm With nylon fabric nitrile rubber Springs 60Si2Mn Valve Stem 0Cr18Ni9 ...