Super Duplex Swing Check Valve Manufacturer in USA
SVR Global manufactures Super Duplex Swing Check Valves built to prevent backflow in piping systems that handle corrosive media, high chloride content fluids, and high pressure operating conditions. Our swing check valves use a hinged disc mechanism that opens with forward flow and closes automatically when flow reverses, protecting pumps, compressors, & downstream equipment from reverse flow damage.
Material Grades We Manufacture?
UNS S32750 (Super Duplex 2507)
UNS S32760 (Zeron 100)
ASTM A995 Grade 5A / 6A (Cast fittings and valve bodies)
ASTM A182 F53 / F55 (forged components)
ASTM A890 Grade 5A / 6A (castings)
Design Standards and Specifications:
Design & Manufacturing: API 594, API 6D, BS 1868, MSS SP-71
Face to Face Dimensions: ASME B16.10
Flanged Ends: ASME B16.5, ASME B16.47
Welding Butt End: ASME B16.25
Wall Thickness: ASME B16.34
Pressure Temperature Ratings: ASME B16.34, ASME B16.5
Inspection & Testing: API 598, API 6D
Pressure Classes and Size Range:
Pressure Classes: Class 150, 300, 600, 900, 1500, 2500
Size Range: DN 15 (1/2") to DN 600 (24")
End Connections: Flanged (RF/RTJ), Butt Weld (BW), Socket Weld (SW), Threaded (NPT/BSP)
Valve Pattern: Full bore and reduced bore configurations
Metallurgical Composition:
Super Duplex material typically contains:
This composition gives the valve body resistance to chloride stress corrosion cracking, pitting, and crevice corrosion in seawater and acidic environments.
Mechanical and Corrosion Properties:
Tensile Strength: ≥ 795 MPa (115 ksi)
Yield Strength: ≥ 550 MPa (80 ksi)
Hardness: ≤ 32 HRC (NACE MR0175 / ISO 15156 compliant)
Elongation: ≥ 15%
Impact Toughness: Charpy V-notch tested at low temperatures per NACE and ASME requirements
Valve Construction Features:
Body and Cover: One piece or bolted bonnet design in Super Duplex casting or forging
Disc and Hinge Mechanism: Non slam design to minimize water hammer effects
Seat Design: Metal to metal or soft seated (PTFE/RPTFE) options
Bonnet Joint: Gasketed or welded construction
Anti static Design: Available for hazardous area applications
Fire Safe Design: Available per API 607 / API 6FA
Testing and Quality Verification:
Hydrostatic Shell Test
Seat Leakage Test (API 598)
Pitting Resistance Test (ASTM G48 Method A/E)
Ferrite Content Measurement
Positive Material Identification (PMI)
Radiographic Test (RT)
Ultrasonic Test (UT)
Dye Penetrant Test (DPT)
Magnetic Particle Test (MPT)
Application Sectors:
SVR Global's Super Duplex Swing Check Valves are supplied for use in:
Offshore oil and gas production platforms
Onshore petrochemical processing plants
Seawater injection and desalination systems
Marine and shipbuilding piping systems
Power generation facilities
Pulp and paper processing lines
Chemical plants
Custom Manufacturing Capabilities:
SVR Global offers manufacturing of Super Duplex Swing Check Valves according to buyer specified drawings, including:
Custom face to face dimensions
Special end connections
Low temperature service configurations
Sour service metallurgy per NACE requirements
Third party witnessed testing and inspection
