... -500mm Best price and quality. Pneumatic Diaphragm Steam Control Valve(150Lb, 300Lb, 600lb,900Lb,etc) Features:Top-guided ... adjustable scope, inherent adjustable ratio is 50:1. The valve actuator use multiple springs structure, and the height reduce ... ,304 Diaphragm With nylon fabric nitrile rubber Springs 60Si2Mn Valve Stem 0Cr18Ni9, 2Cr13,304,316Ordering information When ordering, please specify1 ...