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 ALC® Check Valve is a non-slam spring-assisted, center-guided "wafer" check valve 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 ALC® Check Valve is an easy-to-maintain check valve for applications involving liquids, gases, or steam. Can be used in horizontal or vertical installation. Tapped holes are provided in the body for lifting lugs to assist with installation (10" and larger sizes only).

Standard Features:
  • Sizes 2" thru 24"
  • API 594 Face-to-Face dimensions
  • RF Wafer ends
  • ASME Class 150 and 300
  • Horizontal or vertical installation
  • Standard body materials:
    • A216 Grade WCB carbon steel
    • A351 CF8M stainless steel
  • Stainless steel seat, disc & bushing
  • Spring-assisted silent closing
ALC® Wafer Check Valves
Unit of Measure
Items ALC® Wafer Check Valves
525H1B4A5
API 594 Face-to-Face 2" 316 SS Trim A351 CF8M Class 150 & 300 ALC® Wafer Check Valve 		ALC® Wafer Check Valves
525H1B4D5
API 594 Face-to-Face 2" A351 CF8M 316 SS 150 & 300 Class ALC® Wafer Check Valve, Viton® 		ALC® Wafer Check Valves
522H1B4A5
API 594 Face-to-Face 2" A216 WCB Body, 316SS Trim ANSI Class 150 & 300 ALC® Wafer Check Valve 		ALC® Wafer Check Valves
522H1B4D5
API 594 Face-to-Face 2" A216 WCB 316 SS 150 & 300 Class ALC® Wafer Check Valve, Viton® 		ALC® Wafer Check Valves
525J1B4A5
API 594 Face-to-Face 2 1 & 2" 316 SS Trim A351 CF8M Class 150 & 300 ALC® Wafer Check Valve
Series N/A ALC®
Size N/A 2.00 in N/A 2.00 in N/A 2.00 in N/A 2.00 in N/A 2.50 in
Cold Working Pressure N/A 720 psig N/A 720 psig N/A 740 psig N/A 740 psig N/A 720 psig
Working Steam Pressure N/A 435 psig N/A 515 psig N/A 530 psig N/A 635 psig N/A 435 psig
ASME CLASS N/A 150 300
Dimension A N/A 2.38 in N/A 2.38 in N/A 2.38 in N/A 2.38 in N/A 2.62 in
Dimension B N/A 4.25 in N/A 4.25 in N/A 4.25 in N/A 4.25 in N/A 5 in
B (Dia.) N/A 4.25 in N/A 4.25 in N/A 4.25 in N/A 4.25 in N/A 5 in
Weight N/A 5.8 lb N/A 5.8 lb N/A 5.8 lb N/A 5.8 lb N/A 7.5 lb
Cracking Pressure CP N/A 0.65 psig0.045 bar N/A 0.65 psig0.045 bar N/A 0.65 psig0.045 bar N/A 0.65 psig0.045 bar N/A 0.69 psig0.048 bar
Body1 N/A A351 CF8M N/A A351 CF8M N/A A216 Grade WCB N/A A216 Grade WCB N/A A351 CF8M
Body Material N/A 316 Stainless Steel N/A 316 Stainless Steel N/A Carbon Steel N/A Carbon Steel N/A 316 Stainless Steel
Disc/Stem Assembly N/A 316 SS/Nitronic 60
Trim N/A 316 SS
Seat N/A 316 SS N/A A351 CF8M/Viton® N/A 316 SS N/A A351 CF8M/Viton® N/A 316 SS
Spring2 N/A Inconel® X-750
Bushing3 N/A A479 316
Gasketing4 N/A CFG (Corrugated Flexible Graphite)
Available Soft Seat Materials5 N/A Buna-N (-70 to 250ºF) EPDM (-75 to 300ºF) TFE®-Viton® (-40 to 400ºF) Viton® (-40 to 400ºF) Zelon® (37 to 450ºF)
ENDS N/A Wafer (RF)
ANSI N/A B1.1 B16.34 B16.5
MSS N/A SP-25 SP-6 SP-61
ASTM N/A A216GR WCB A351GR CF8M
Temperature Rating N/A -460 to 700 ºF N/A -40 to 400 ºF N/A -20 to 700 ºF N/A -20 to 400 ºF N/A -460 to 700 ºF
Other N/A API 594 API PED
Cv N/A 120 N/A 120 N/A 120 N/A 120 N/A 205
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
  • 1 Other Body Materials Available.
  • 2 316 SS Spring is Available.
  • 3 Teflon® bearing on 14", 16", 18", 20", and 24". Maximum Temperature 450º F.
  • 4 316/Graphite Material. Gaskets Only Used on Valves 10" and Larger
  • 5 Teflon Encapsulated Viton