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DFT WLC® Wafer Check Valves
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DFT WLC® Wafer Check Valves


The DFT® Model WLC Wafer style Silent Check Valve is a lightweight, spring-assisted, in-line check valve that provides reliable, low maintenance service for a wide range of fluids and pressure/temperature combinations. The joint between the seat ring and body is sealed by the flange gasket upon installation preventing any leakage through the joint when the valve is in service.


  • Wafer design
  • Lighweight
  • Spring-assisted silent closing
  • Edge guided (1" & 1 1/2" - ASME 600 to 2500)
  • Center guided/Dual guided stem
    • 1" to 10" ASME 150/300
    • 2" to 10" ASME 600 to 2500
  • Horizontal or vertical installation
  • Protected spring
  • ASME 150 to 2500
    • 1" to 10" Line Size
    • WCB & SS bodies
    • SS Trim
    • Ends:
      • Wafer RF
      • Wafer RTJ
    • MSS-SP 61 seat leakage
    • API 594 Face-to-Face dimension:
      • Class 600 RF
      • Class 900/1500 RF
  • Axial flow
  • Nozzle style


  • Autoclaves
  • Boiler Feed & Discharge
  • Chemical Lines
  • Condensate Lines
  • Cookers
  • Cooling Towers
  • Crude & Refined Product Lines
  • Cryogenics
  • Digester
  • Evaporators
  • Fly Ash System
  • Generator Inlet & Discharge
  • Hydraulic Lines
  • Metering Pumps
  • Mine Dewatering
  • 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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