Ductile Iron Flanged Ends Globe Check Valve 1.0MPa for WaterBall Check Valve1.Face to Face:DIN3202 F6, BS51532.Flange drilled: DIN2501, BS45043.Normal pressure: 1.0MPa, 1.6MPa, 2.5MPa4.Suitable medium: waterbody,cover: Cast Iron / Ductile irondisc: Ductile iron&EPDM/NBR