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TLW® Wafer Check Valves
Wafer Check Valves
The TLW® Check Valve (Tapped Lug Wafer) was engineered for applications where exposed studs are not suitable. This non-slam spring-assisted, center-guided, lugged pattern wafer check valve is designed to prevent water hammer and reverse flow. The lightweight compact design fits between mating flanges and meets API 594 face-to-face dimensions. The TLW® Check Valve body design eliminates potential leak paths to the environment and is an easy-to-maintain check valve for applications involving liquids, gases, or steam. Tapped holes are provided in the body for lifting lugs to assist with installation (10" and larger sizes only).
Standard Features:
Standard Features:
- Sizes 2" thru 24"
- ASME Class 150 and 300
- Standard Body Materials:
- A216 Grade WCB Carbon Steel
- A351 CF8M Stainless Steel
- API 594 Face-to-Face Dimensions
- Threaded Lug Design
- ASME B16.5 Bolt Hole Pattern
- RF Wafer Ends
- Horizontal or Vertical Installation
Unit of Measure
Items |
425H1A4A5 API 594 Face-to-Face 2" 316 SS Trim A351 CF8M Class 150 TLW® Wafer Check Valve |
425H1B4A5 API 594 Face-to-Face 2" 316 SS Trim A351 CF8M Class 300 TLW® Wafer Check Valve |
422H1B4A5 API 594 Face-to-Face 2" A216 WCB Body, 316SS Trim ANSI Class 300 TLW® Wafer Check Valve |
422H1A4A5 API 594 Face-to-Face 2" A216 WCB Body, 316SS Trim ANSI Class 150 TLW® Wafer Check Valve |
422H1A4H5 API 594 Face-to-Face 2" 316 SS/Viton®-F A216 WCB Class 150 TLW® Wafer Check Valve |
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Series | N/A TLW® | |||||||||
Size | N/A 2.00 inDN 50 | |||||||||
Cold Working Pressure | N/A 275 psig18.98 barg | N/A 720 psig49.68 barg | N/A 740 psig51.06 barg | N/A 285 psig19.67 barg | N/A | |||||
Working Steam Pressure | N/A 110 psig | N/A 435 psig | N/A 530 psig | N/A 110 psig | N/A | |||||
ASME CLASS | N/A 150 | N/A 300 | N/A 300 | N/A 150 | N/A 150 | |||||
Dimension A | N/A 2.38 in60 mm | |||||||||
Dimension B | N/A 6.00 in152.40 mm | N/A 6.50 in165.10 mm | N/A 6.50 in165.10 mm | N/A 6.00 in152.40 mm | N/A 6 in152.4 mm | |||||
Dimension C | N/A | |||||||||
O.D. | N/A | |||||||||
Weight | N/A 15 lb6.8 kg | N/A 17 lb7.7 kg | N/A 17 lb7.7 kg | N/A 15 lb6.8 kg | N/A 15 lb6.8 kg | |||||
Cracking Pressure CP | N/A 0.65 psig0.045 bar | N/A 0.65 psig0.045 bar | N/A 0.5 psig0.035 bar | N/A 0.5 psig0.035 bar | N/A 0.5 psig0.034 bar | |||||
Body1 | N/A A351 CF8M | N/A A351 CF8M | N/A A216 Grade WCB | N/A A216 Grade WCB | N/A A216 Grade WCB | |||||
Trim | N/A 316 SS | |||||||||
Temperature Rating2 |
N/A -460 to 700 ºF-273.33 to 371.11 ºC | N/A -460 to 700 ºF-273.33 to 371.11 ºC | N/A -20 to 700 ºF-28.89 to 371.11 ºC | N/A -20 to 700 ºF-28.89 to 371.11 ºC | N/A -40 to 400 ºF | |||||
Seat | N/A 316 SS | N/A 316 SS | N/A 316 SS | N/A 316 SS | N/A 316 SS/Viton® F | |||||
Spring3 | N/A Inconel® X-750 | |||||||||
ANSI | N/A B1.1 B16.34 B16.5 | N/A B1.1 B16.34 B16.5 | N/A B1.1 B16.34 B16.5 | N/A B1.1 B16.34 B16.5 | N/A B16.34 B16.5 | |||||
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) | |||||||||
Applications | N/A 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 | |||||||||
ASTM | N/A A216GR WCB A351GR CF8M | |||||||||
MSS | N/A SP-25 SP-6 SP-61 | |||||||||
Body Material | N/A 316 Stainless Steel | N/A 316 Stainless Steel | N/A Carbon Steel | N/A Carbon Steel | N/A Carbon Steel | |||||
Disc/Stem Assembly | N/A 316 SS/Nitronic 60 | |||||||||
Bushing4 | N/A A479 316 | |||||||||
Gasketing5 | N/A CFG (Corrugated Flexible Graphite) | |||||||||
Other | N/A API 594 | |||||||||
ENDS | N/A Wafer (RF) | |||||||||
Cv | N/A 120 | |||||||||
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