Find My Check Valve
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.

Size/Class
  • 1", 1 1/2" - 150/300
  • 2" to 8" - 150/300
  • 10" - 150
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Unit of Measure
Items
WLC® Wafer Check Valves

A216 WCB 1" 316 SS Class 150/300 RF WLC® Wafer Check Valve
WLC® Wafer Check Valves

A351 CF8M 1" 316 SS Class 150/300 RF WLC® Wafer Check Valve
WLC® Wafer Check Valves

A351 CF8M 1" 316 SS Class 1500 (RTJ) RF WLC® Wafer Check Valve
WLC® Wafer Check Valves

A351 CF8M 1" 316 SS Class 600 RF WLC® Wafer Check Valve
WLC® Wafer Check Valves

A351 CF8M 1" 316 SS Class 900/1500 RF WLC® Wafer Check Valve
OLD PART # N/A 9030-1 N/A 9033-1 N/A 9131 N/A 9013-1 N/A 9041-1
Series N/A WLC®
ASME CLASS N/A 150 300 N/A 150 300 N/A 1500 N/A 600 N/A 900 1500
Size N/A 1.00 inDN 25
Dimension A N/A 2.00 in51 mm N/A 2.00 in51 mm N/A 2.38 in60 mm N/A 2.38 in60 mm N/A 2.38 in60 mm
Dimension B N/A 2.88 in73 mm N/A 2.88 in73 mm N/A 3.13 in80 mm N/A 2.88 in73 mm N/A 3.13 in80 mm
Weight N/A 2 lb0.9 kg N/A 2 lb0.9 kg N/A 4.0 lb1.8 kg N/A 2 lb0.9 kg N/A 4.0 lb1.8 kg
Cracking Pressure CP N/A 0.025 bar0.36 psig N/A 0.025 bar0.36 psig N/A 0.03 bar0.44 psig N/A 0.025 bar0.36 psig N/A 0.03 bar0.44 psig
Cracking Pressure CP Tolerance N/A ±10%
Body N/A A216 Grade WCB N/A A351 CF8M N/A A479-316 N/A A479-316 N/A A479-316
Body Material N/A Carbon Steel N/A Stainless Steel N/A Stainless Steel N/A Stainless Steel N/A Stainless Steel
Disc/Stem Assembly N/A A351 CF8M/A479 316
Seat N/A A351 CF8M
Spring N/A A313 316
Bushing N/A A479 316 (No bushing in 1" and 1.5", 150 & 300) N/A A479 316 (No bushing in 1" and 1.5", 150 & 300) N/A A479 316 N/A A479 316 N/A A479 316
Trim N/A CF8M/316 SS
Available Soft Seat Materials N/A Buna-N (-70 to 250°F) EPDM (-75 to 300°F) TFE®-Viton® (-40 to 400°F) Viton® (-40 to 400°F) Zelon® (37 to 400°F)
ENDS N/A Wafer (RF)
ANSI N/A B1.1 B16.25 B16.34 B16.5
MSS1 N/A SP-125 SP-126 SP-25 SP-6 SP-61
ASTM N/A A126 CLASS B A216GR WCB A351GR CF8M
Features N/A
  • Wafer design
  • Lightweight
  • 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
Cv N/A 19
Applications N/A 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
  • 1
    • SP-61: Class 125 and 250 Cast Iron valves are leak tested in accordance with AWWA.
    • SP-125: Cast Iron Valves only. TFE-Viton® - Teflon Encapsulated Viton.
    • SP-126: Except Cast Iron Valves.