Double Flange Butterfly Valve

Double Flange Butterfly Valve  1) Size: 2" - 40" 2) Class: 125lbs 150lbs Technical standards: 1) Design and manufacture: API 6D 2) Face-to-face: DIN3202 F4(SHORT/MIDDLE/LONG BODY)SERIES 13 3) Flange end: PN10 PN16 ANSI B16.5 Main materials: 1) Body and disc: Brass, carbon steel, stainless steel, Hascrome 2) Stem: Stainless steel 3) Torsion spring: Stainless steel 4) Seal surface: Buna-n rubber, stainless steel, gathered four fluorine Ethylene, and nylon plastics

ball valve