... quality. Pneumatic Diaphragm Steam Control Valve(150Lb, 300Lb, 600lb,900Lb,etc) Features:Top-guided Single Seated Control Valves, compact valve body ... Body, Bonnet ZG230-450, ZG0Cr18Ni9,304,316,WCB, WC6, WC9, etc Plug, Seat 0Cr18Ni9, 0Cr18Ni9+PTFE, 0Cr18Ni9+stellite,3014,316,stl ... you. Pneumatic Diaphragm Steam Control Valve(150Lb, 300Lb, 600lb,900Lb,etc)