Bonny Valve has very extended experience in manufacturing of Forged Swing/Piston Type Check Valves Size: ½ inch up to 2 inch (DN15 up to DN50) Pressure Rating: ASME 150LB to 2500LB Materials: Forged Carbon Steel, Low Temperature Carbon Steel, Stainless Steel, Duplex Stainless Steel, Super Duplex Stainless Steel, Nickel Alloys, Nickel Aluminum Bronze, Hastelloy, Inconel Etc. End Connection: Flanged RF, FF, RTJ, BW, NPT, SW Ends Specification: Design API602 / BS5352 / ASME B16.34 End Flange ASME B16.5 BW End ASME B16.25 SW End ASME B16.11 Screwed Ends ASME B1.20.1 Test API598 Special NACE MR-01-75 Features: Bolted Cover , Welded Bonnet or Pressure Seal Bonnet Full port or Conventional Port Swing or Piston Disc