Aluminium body Wafer butterfly valve with and 304 disc, PTFE seat, lever, PN 16features:body:Aluminium alloy Body;Seat:PTFE(or NBR/EPDM/VITON);Design Standard: EN 593 , MSS SP67 API 609 BS5155Face to Face: ISO5752, DIN3202,API609;Flange connection: EN1092-2 PN10/16,10K,150LBS,5K;Top flange:ISO5211;Working pressure: PN10,PN16;Size:DN50-DN1200;testing pressure:shell: 1.5 times rated pressure;seat: 1.1 times rated pressure;