... saving and long service life.3,3D eccentricity,resistant to high temperature ,corrosion and abrasion.Specifications:1) Pressure class: 150 - 300lbs ... ), 304, 316, 304L, 316L, 38CrMoAlA, 25Cr1MoV7) Packing: graphite 8) Operating type: worm gear, pneumatic actuatorDrawing and technique data sheet will be ... worked out for your confirmation before after place order. wafer type butterfly valve