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DFT Excalibur® Flanged Check Valves
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DFT Excalibur® Flanged Check Valves


The DFT® Excalibur Silent Check Valve is a spring-assisted, center guided, in-line, check valve that provides reliable, low maintenance service for a wide range of fluids and pressure/temperature combinations. The valve consists of a body, gasket, seat, spring, disc with stem and guide bushing. Excalibur check valves are available in a wide range of sizes and pressure ratings and in a variety of metals to meet most check valve requirements.


  • ASME B16.10 Face-to-Face dimensions
  • Spring-assisted silent closing, non-slam
  • 2" to 24" Line size
  • ASME 150 to 1500
  • WCB & SS bodies
  • SS trim
  • Ends:
    • RF Flanged
    • RTJ
  • Center guided
  • Dual guided stem
  • Horizontal or vertical installation
  • Tight shut-off
  • Two-piece body
  • Protected spring
  • Easy maintenance
  • Versatile
  • Axial flow
  • Nozzle style


  • Autoclaves
  • Boiler Feed & Discharge
  • Chemical Lines
  • Compressor Discharge
  • Condensate Lines
  • Cookers
  • Cooling Towers
  • Crude & Refined Product Lines
  • Cryogenics
  • Digester
  • Evaporators
  • Fly Ash System
  • Generator Inlet & Discharge
  • Hydraulic Lines
  • Metering Pumps
  • Mine Dewatering
  • Nitrogen Purge
  • Process Lines
  • Pump Discharge
  • Refrigeration
  • Steam Lines
  • Vacuum Breaker
  • Water Lines
  • Water Treatment


DFT®, formerly known as Durabla® Fluid Technology, has been making in-line check valves and severe service control valves for over 70 years. It started with a customer’s need for a small metal-seated check valve that could be installed in any position while providing tight shut-off. The Basic-Check® valve was developed to satisfy that need. Over the following decades, other customers’ needs led to the development of the ALC®, BNC®, DLC®, DSV®, Excalibur®, FBC™, GLC®, GPV™, PDC®, SCV® , TLW® and WLC® styles of in-line silent axial flow check valves. Each of these DFT® in-line check valves addresses the particular needs of today’s customer.


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