Abacus Precision-Engineered Wafer Check Valves

Providing reliable backflow prevention and protection for pipelines, ensuring safe and efficient operation in various industries.

Abacus products are available in a wide range of materials including:
Stainless Steels (Austenitic, Martensitic and Duplex), Carbon Steels (LCB, LCC, WCB), HastelloyTM, (Nickel Alloy), MonelTM (Nickel Alloy), Titanium, Cast Iron and Plastics (PTFE, PVC, PP, PVDF).

Types

Series 4X7 – Retainerless Long Pattern Twin Plate

  • Retainerless design
  • No leakpath to atmosphere
  • Lightweight
  • Compact
  • Economical
  • Easily installed
  • Tight shut-off (resilient seat)
  • Anti-slam
  • Complies fully with API594
  • Suitable for vertical pipe
  • Suitable for all the common flanges

Series 4X4 – Double Flanged Twin Plate

  • Retainerless design
  • No leakpath to atmosphere
  • Lightweight
  • Compact & Economical
  • Easily installed
  • Tight shut-off (resilient seat)
  • Anti-slam
  • Complies with API594 (except face to face)
  • Suitable for vertical pipe
  • Suitable for ASME B16.5 flanges

eSeries 9X7 – Short Pattern Twin Plate

  • Lightweight
  • Compact
  • Economical
  • Easily installed
  • Tight shut-off (resilient seat)
  • Anti-slam
  • Suitable for all common flanges

Series 9X9 – Long Pattern Twin Plate

  • Lightweight
  • Compact
  • Economical
  • Easily installed
  • Tight shut-off (resilient seat)
  • Anti-slam
  • Complies fully with API 594
  • Suitable for all common flanges
  • Full flow area

Series 4X7H – Hub Ended Twin Plate

  • Double flanged type (independent bolting arrangement)
  • Retinerless design as standard
  • No Leak Path to the Atmosphere
  • Metal to metal seating for inherent fire safety
  • Resilient Seat option
  • API 594 design standard
  • ASME B16:34 Pressure / Temp. ratings

Series 4x7L Solid Lugged Twin Plate

  • Solid lugged type (through bolting arrangement)
  • Retainerless design as standard
  • No Leak Path to the Atmosphere
  • Metal to metal seating for inherent fire safety
  • Resilient Seat Option
  • API 594 design standard
  • ASME B16:34 Pressure / Temp. ratings

Series 4x7U Double Flange Twin Plate

  • Double flanged type (independent bolting arrangement)
  • Retainerless design as standard
  • No Leak Path to the Atmosphere
  • Metal to metal seating for inherent fire safety
  • Resilient Seat option
  • API 594 design standard
  • ASME B16:34 Pressure / Temp. ratings

Series 497 Short FTF/Cast Iron Twin Plate

  • Lightweight
  • Compact
  • Economical
  • No Leak Path to the Atmosphere
  • Easily Installed
  • Tight Shut-Off (Resilient Seat)
  • Anti-Slam
  • Complies with API 594
  • Suitable for all common flanges

Series 3X7 – Nozzle Check Valve

  • Quick, dynamic non-slam
  • Minimum pressure drop
  • Tight shut-off
  • API 6D compliant
  • API 598 compliant
  • ASME B16.34 Pressure/Temp. ratings
  • Suitable for all common flanges

Series 3X5 – Nozzle Check Valve

  • Slimline Design
  • Quick, dynamic non-slam
  • Minimum pressure drop
  • Tight shut-off
  • API 6D compliant
  • Suitable for all common flanges

Series 9X5 – Sprung Disc Wafer Check

  • Lightweight
  • Compact
  • Economical
  • Easily installed
  • Tight shut-off (resilient seat)
  • Anti-slam
  • Face to face to BS 7438 and EN 558.2
  • Suitable for vertical pipe
  • Suitable for all common flanges
Series 9x5 Datasheet

Series 545 – Short Pattern Sprung Disc

  • Lightweight
  • Compact
  • Economical
  • Easily installed
  • Tight shut-off (resilient seat)
  • Tight shut-off (resilient seat)
  • Suitable for vertical pipe
  • Suitable for all the common flanges
Series 545 Datasheet

Series 5X6 – Short Pattern Swing Type

  • Lightweight
  • Extremely compact
  • Economical
  • Easily installed
  • Tight shut-off
  • Low maintenance
  • Retained disc
  • Single moving part

Series 5X7 – Long Pattern Swing Type

  • Lightweight
  • Compact
  • Economical
  • Easily installed
  • Anti-slam
  • Tight shut-off (resilient seat)
  • Low maintenance
  • One piece disc and shaft for maximum strength
  • Complies with API 594
  • Suitable for all common flanges
  • One moving part

Series 5X8 – Long Pattern Sprung Swing

  • Lightweight
  • Compact
  • Economical
  • Easily installed
  • Anti-slam
  • Tight shut-off (resilient seat)
  • Low maintenance
  • One piece disc and shaft for maximum strength
  • Complies with API 594
  • Suitable for all common flanges
  • Retained disc

Series 5X9 – Full Bore Sprung Swing

  • Full Bore
  • Lightweight
  • Compact
  • Economical
  • Easily installed
  • Tight shut-off (resilient seat)
  • Anti Slam
  • One piece disc and shaft for maximum strength

Series 7X6 – Short Pattern Swing Type

  • Lightweight
  • Extremely Compact
  • Economical
  • Low maintenance
  • Easily installed
  • Tight shut-off (resilient seat)
  • One moving part
  • Retained disc
  • One piece disc and shaft for maximum strength
  • Complies with API 6D
  • Suitable for all common flanges
Series 5x7 Datasheet

Series 7X9 – Full Bore Swing Type

  • Full Bore
  • Lightweight
  • Compact
  • Economical
  • Low maintenance
  • Easily installed
  • Tight shut-off (resilient seat)
  • One moving part
  • One piece disc and shaft for maximum strength
  • Retained disc
Series 5x8 Datasheet

Series 9X6 – Short Pattern Sprung Swing

  • Lightweight
  • Compact
  • Economical
  • Low maintenance
  • Easily installed
  • Tight shut-off (resilient seat)
  • Anti-slam
  • Retained disc
  • One piece disc and shaft for maximum strength
Series 5x9 Datasheet
Series 7x6 Datasheet
Series 7x9 Datasheet
Series 9x6 Datasheet

Series 743X – Sprung Disc

  • Suitable for raised face flanges
  • Lightweight
  • Compact
  • Economical
  • Easily installed
  • Anti-slam
  • Face to face to BS 7438 and EN 558.2
  • Suitable for vertical pipe

Series 943X – Swing Type

  • Lightweight
  • Compact
  • Economical
  • Easily installed
  • Tight shut-off
  • One moving part
  • Retained disc
  • One piece lined disc and shaft for maximum strength

Series 7X0 – Swing Type Wafer Check

  • Full bore
  • Lightweight
  • Compact
  • Economical
  • Low maintenance
  • Easily installed
  • Tight shut-off
  • One moving part
  • One piece lined disc and shaft for maximum strength
  • Suitable for all the common flanges
  • Retained disc

Series 7X1 – Sprung Disc Wafer Check

  • Lightweight
  • Compact
  • Economical
  • Easily installed
  • Tight shut-off
  • Anti-slam
  • Face to face to BS 7438 and EN 558.2
  • Suitable for vertical pipe
  • Suitable for all the common flanges
Series 743X Manual

Series 7X2 – Short Pattern Swing Type

  • Lightweight
  • Extremely Compact
  • Economical
  • Low maintenance
  • Easily installed
  • Tight shut-off
  • One moving part
  • Retained disc
  • One piece disc and shaft for maximum strength
  • Suitable for all the common flanges
Series 943X DAtasheet

Series 7X4 – Short Pattern Twin Plate

  • Lightweight
  • Compact
  • Economical
  • Easily installed
  • Tight shut-off
  • Anti-slam
  • Suitable for all the common flanges
Series 7X0 DAtasheet

Series 9X2 – Short Pattern Sprung Swing

  • Lightweight
  • Compact
  • Economical
  • Low maintenance
  • Easily installed
  • Tight shut-off
  • Anti-slam
  • Retained disc
  • One piece disc and shaft for maximum strength
  • Suitable for all the common flanges
Series 7X1 DAtasheet

Series 9X4 – Long Pattern Twin Plate

  • Lightweight
  • Compact
  • Economical
  • Easily installed
  • Tight shut-off
  • Anti-slam
  • Face to face API 594
  • Full flow area
Series 7X2 DAtasheet
Series 7X4 DAtasheet
Series 9X2 DAtasheet
Series 9X4 DAtasheet