Excalibur<sup>®</sup> NAB Check Valve

Excalibur® NAB Check Valve

The DFT® Excalibur® NAB (Nickel-Aluminum Bronze) Silent Check Valve is a spring-assisted, nozzle style, non-slam check valve and designed to withstand the harsh environments of salt and brine water applications where corrosion resistance and marine life deterrents are a must. DFT’s centre guided check valves provide reliable, low-maintenance service and solve the problems associated with water hammer and severe applications and environments.


  • ASME B16.10 Face-to-Face dimensions
  • Spring-assisted silent closing, non-slam
  • 2” to 24” Line size
  • ASME 150 to 1500
  • Standard body materials:
    • Nickel-Aluminum Bronze
  • Standard ends:
    • RF Flanged
  • Optional ends:
    • Butt weld
    • Flanged x Butt weld
    • RTJ
    • Victaulic®
  • Center-guided
  • Dual-guided stem
  • Horizontal or vertical installation
  • Tight shutoff
  • Two-piece body
  • Protected spring
  • Easy maintenance
  • Versatile
  • Axial flow
  • Nozzle style
  • Options:
    • Inconel® X-750 spring
    • Soft seat
    • Custom sizing low flow
    • Severe service trim
    • Stellite® trim
    • NACE
  • Trim Options:
    • Nickel-Aluminum Bronze
    • Monel®
    • Stainless Steel

*consult TFC for larger sizes
**consult TFC for additional alloys