Wafer Check Valves

The DFT® Model WLC® Wafer Style Check Valve is a lightweight, spring-assisted, center-guided, non-slam 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.

Standard Features:

Wafer Design
Center-Guided/Dual-Guided Stem
Horizontal or Vertical Installation
Spring-Assisted Silent Closing
Protected Spring
ASME Class 150 to 1500 (Contact DFT for ASME 2500 Availability)

1" to 10" Line Size (Contact DFT for ASME 2500 Availability)
316 SS Trim
Ends:

Wafer RF
Wafer RTJ

MSS-SP 61 Seat Leakage
MSS 126 Face-To-Face Dimension:

Class 150 & 300 RF

API 594 Face-To-Face Dimension:

Class 600 RF
Class 900 & 1500 RF

Axial Flow
Nozzle Style
Lightweight

Unit of Measure

Items	902E1B4A3 WCB 1" 316 SS Class 150 & 300 RF WLC® Wafer Check Valve	905E1B4A3 A351 CF8M 1" 316 SS Class 150 & 300 RF WLC® Wafer Check Valve	905E2E4A3 A351 CF8M 1" 316 SS Class 1500 RTJ WLC® Wafer Check Valve	905E1C4A3 A351 CF8M 1" 316 SS Class 600 RF WLC® Wafer Check Valve	905E1E4A3 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®
Size	N/A 1.00 in
Cold Working Pressure	N/A 740 psig	N/A 720 psig	N/A 3600 psig	N/A 1440 psig	N/A 3600 psig
Working Steam Pressure	N/A 620 psig	N/A 495 psig	N/A 2480 psig	N/A 990 psig	N/A 2480 psig
ASME CLASS	N/A 150 300	N/A 150 300	N/A 1500	N/A 600	N/A 900 1500
Dimension A	N/A 2.00 in	N/A 2.00 in	N/A 2.38 in	N/A 2.38 in	N/A 2.38 in
Dimension B	N/A 2.88 in	N/A 2.88 in	N/A 3.13 in	N/A 2.88 in	N/A 3.13 in
Weight	N/A 2 lb	N/A 2 lb	N/A 4.0 lb	N/A 2 lb	N/A 4.0 lb
Cracking Pressure CP	N/A 0.36 psig0.025 bar	N/A 0.36 psig0.025 bar	N/A 0.44 psig0.03 bar	N/A 0.36 psig0.025 bar	N/A 0.44 psig0.03 bar
Cracking Pressure CP Tolerance	N/A ±10%
Body	N/A A216 Grade WCB	N/A A351 CF8M	N/A A351 CF8M	N/A A351 CF8M	N/A A351 CF8M
Body Material	N/A Carbon Steel	N/A Stainless Steel	N/A Stainless Steel	N/A Stainless Steel	N/A Stainless Steel
Spring	N/A 316 SS
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 (No bushing in 1" and 1.5", 150 & 300)	N/A A479 316
Trim	N/A 316 SS
Available Soft Seat Materials	N/A Buna-N (-70 to 250ºF) EPDM (-75 to 300ºF) TFE®-Viton® (-40 to 400ºF) Viton® (-40 to 400ºF) Zelon® (37 to 470ºF)
Disc/Stem Assembly	N/A 316 SS
Other	N/A API 594 (600#, 900/1500#) API PED (EXCEPT CAST IRON VALVES)
Seat	N/A 316 SS
Disc	N/A 316 SS
ENDS	N/A Wafer (RF)	N/A Wafer (RF)	N/A Wafer (RTJ)	N/A Wafer (RF)	N/A Wafer (RF)
ANSI	N/A B1.1 B16.20 B16.34 B16.5
MSS¹	N/A SP-125 (CAST IRON VALVES ONLY) SP-126 (EXCEPT CAST IRON VALVES) SP-25 SP-6 SP-61(CLASS 125 & 250 CAST IRON VALVES)
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
Temperature Rating	N/A -20 to 450 ºF-28.89 to 232.22 ºC	N/A 37 to 450 ºF2.78 to 232.22 ºC	N/A -460 to 450 ºF-273.33 to 232.22 ºC	N/A -460 to 450 ºF-273.33 to 232.22 ºC	N/A -460 to 450 ºF-273.33 to 232.22 ºC
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
Gasketing	N/A	N/A	N/A Spiral Wound Graphite/CFG (900# and UP)	N/A	N/A Spiral Wound Graphite/CFG (900# and UP)
Note	N/A Sizes 1" to 8" are Dual Rated Class 150/300 Contact DFT for Class 2500 Availability.
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.