Rubber disc check valve is comprised of body, cover and rubber disc. Inside of the rubber disc is steel plate, steel bar and reinforced nylon liner and the outside is rubber and the disc life is more than one million open-close cycles. To ensure the pressure loss is very little and no sundries pile up in the body ,The valves is devised asunimpeded bore,and it is easy to maintain this kind of valves. Rubber Disc Check Valve Technical Specification: 1. Nominal pressureï¼?.0~1.6Mpa 2. Work temperature: 0~80â„? 3. Nominal diameterï¼?0ï½?00mm 4. Medium: water and weak corrosive fluid, etc. Mail part & material: 1. Bonnet: pray cast iron, ductile cast iron 2. Disc: steel plate+ nylon + NBR 3. Body: pray cast iron, ductile cast iron Main external and connection dimension: DN 50 65 80 100 150 200 250 300 350 400 450 500 600 L 203 216 241 292 356 495 622 698 787 914 978 978 1295