Overview
Check Valve is applicable for various pipelines with nominal pressure of PN1.0MPa~42.0 MPa,Class150~2500 and nominal diameter of DN15~1200mm,NPS1/2-48 and working temperature of -196~540℃ to be used for protecting from medium back flowing. The different materials selection can apply to the medium involving water, steam, oils, nitric acid, strong oxidizing medium and urea etc.
Technical Data
Stem: Stainless Steel
Spring: Stainless Steel
Seat: EPDM, NBR, Stainless Steel
Size: DN40-DN600mm PN1.0-1.6MPa
Working temperature:-196℃~+560℃
Body: Cast Iron, Ductile Iron, Carbon Steel, Stainless Steel
Flange Connection: DIN, ANSI, BS, JIS, UNIVERSAL FLANGE
Disc: Ductile Iron with Nickel Coating, Ductile Iron with Nylon Coating, Stainless Stee 304/316l, Alu-Bronze
Product Features
Resilient Buna-N or EPDM Seat
Upper and lower PTFE thrust washers
Wafer body style fit between FF or RF flanges
Torsion springs assist valve closure, preventing flow reversal
Thrust washer reduce friction and wear of valve plate hinges
Dual plate valves give maximum strength with minimum opening time
Main Parameter Specification
BW end Dimension：ASME B16.25
Face to Face and End to End：ASME B16.10
Pressure-temperature ratings：ASME B16.34
Wall Thickness Dimension：API 600,BS 1868
Inspection and Test：API598,API600 or API 6D
Design and Manufacture：Cast Steel Check Valve to BS 1868,ASME B16.34,API 6D