Butterfly valve (WLV-D)

Specifications:
1) Class pressure: 150 - 300lbs 
2) Size: 6 - 72"
3) Temperature: -29癈 - 425癈 (WCB), -196癈 - 600癈 (SS) ?70癈
alloy steel
4) Suitable medium: water, oil, vapor
5) Body and disc material: WCB, WC1, WC5, WC6, WC9, WC12, CF3, CF8, CF3M, CF8M
6) Stem material: 410, 304, 316, 304L, 316L, 38CrMoAlA, 25Cr1MoV
7) Stuffing: soft graphite
8) Operation: worm gear, pneumatic, etc.