Swing Check Valve Company in China: Carbon Steel Swing Check Valve, DN25-DN400, Pressure 1.6-25 MPa, Carbon Steel Body, Bonnet, Disc. Product name: Carbon Steel Swing Check Valve. Size: DN25-DN400. Working pressure (MPa): 1.6-25. Proper temperature: 425 or 550 Suitable media Water, steam, oil, or weak corrosive medium. Body, bonnet, disc: Carbon steel or Chrome Nickel-titanium Stainless Steel. Sealing surface: Carbon steel surfacing iron-based alloys or body sealed.