... building materials, metallurgy, mine, petrochemical, power, light industry and other industries, used for high pressure pneumatic conveying cement, ... valve perfect structure, reversing flexible, reliable, and good air-tightness and wear resistance, etc, and transmission channel smooth, no jam, ensure ... temperatureSuitable media0.5MPa≤200°CCoal, raw, cement powder and granular materialsSix, contour map