DFT® Inc
DFT® Inc
140 Sheree Blvd. PO Box 566
Exton, PA 19341-0566
Phone: 800.206.4013
Fax: 847.540.1422
Email: dft@dft-valves.com
Website: www.dft-valves.com
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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 involvingmore
Unit of Measure

Specifications

Series

 TLW®

Size

 3.00 in

Cold Working Pressure

 285 psig

Working Steam Pressure

 110 psig

ASME CLASS

 150

Dimension A

 2.88 in

Dimension B

 7.50 in

Weight

 29 lb

Cracking Pressure CP

 0.63 psig0.043 bar
Temperature Rating1 -20 to 700 ºF-28.89 to 371.11 ºC

ENDS

 Wafer (RF)

Cv

 260

Materials of Construction

Body2 A216 Grade WCB

Trim

 316 SS

Seat

 316 SS
Spring3 Inconel® X-750

Body Material

 Carbon Steel

Disc/Stem Assembly

 316 SS/Nitronic 60
Bushing4 A479 316
Gasketing5 CFG (Corrugated Flexible Graphite)

Codes and Standards

ANSI

 B1.1 B16.34 B16.5

ASTM

 A216GR WCB A351GR CF8M

MSS

 SP-25 SP-6 SP-61

Other

 API 594

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)

Application

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

Industry

N/A Building Maintenance Chemical Processing Food, Beverage & Pharmaceutical Gas Transmission Mining Petroleum Production & Refining Power Generation Primary Metals Pulp & Paper Textiles

  • 1 Pressure/Temperature ratings in accordance with ASME/ANSI B16.34
    For Class 600/900/1500/2500 Consult DFT Factory.
  • 2 Other Body Material Available.
  • 3 316 SS Spring is Available.
  • 4 Teflon® bearing on 14", 16", 18", 20", and 24". Maximum Temperature 450º F.
  • 5 316/Graphite Material. Gaskets Only Used on Valves 10" and Larger