... : water, oil, gas,vapor,steam etc.5) Body and disc material: WCB, CF3, CF8, CF3M, CF8M etc.6) Stem ... material: 410(1Cr13),420(2Cr13), 304, 316, 304L, 316L, 38CrMoAlA, 25Cr1MoV7) ... : graphite 8) Operating type: worm gear, pneumatic actuatorDrawing and technique data sheet will be worked out for your confirmation before after place ...