Butterfly valve in different materials and flange standards 1. Body material: Cast Iron, WCB, WC6, WC9, CF8, CF8M, CF3, CF3M 2. Design standard: API 609 3. Face to face: API 609 4. Flange ends: ANSI B16.5 5. Welding ends: ANSI B16.25 6. Pressure test: API 598 7. Type of operation: Lever, Worm Gear actuator, Electric actuator, Pneumatic actuator Applicable Medium: Water, steam, air, oil, alkali, ...