Wormgear butterfly valve 1. Size: DN50-DN350; Pressure: PN10/PN16 2. Body:CI/DI; Disc: DI/SS; Seat: NBR/EPDM 3. Gear operated Wormgear Wafer Butterfly ValveSpecification:Size: 2”-14” / 50mm – 350 mmDesign standard: API 609, BS EN 593, GB T12238Face-to-Face dimension: API 609, ISO 5752, BS EN 558.Flange Drilling: ANSI B 16.1, BS EN 1092-2, JIS 5K, 10K, 16K.Test: API 598.Pressure & Temperature ...