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The DFT® Model DLC® is a corrosion resistant, dependable, versatile and economical spring assisted, in-line check valve for a wide range of applications. Whether the fluid is liquid, gas or steam, the DLC® provides tight shut-off and protects other equipment in the system from water hammer. Its stainless steel construction insures a long service life.
Inconel® X-750 spring is standard

Standard Features:
  • 1/2" to 3" Line size
  • ASME Class 150 and 300
  • Standard Body Material A351 CF8M
  • Stainless Steel Construction
  • ANSI B16.10 Face-to-Face Dimensions
  • Raised Face Flanged Ends
  • Inconel® X-750 Spring
  • Electron Beam Welded Body
  • Spring-Assisted Silent Closing, Non-Slam
  • Horizontal or Vertical Installation
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Unit of Measure
Items
DLC® Flanged Check Valves

1/2" 316 SS Class 300 RF DLC® Flanged Check Valve
DLC® Flanged Check Valves

1/2" 316 SS Class 150 RF DLC® Flanged Check Valve
DLC® Flanged Check Valves

3/4" 316 SS Class 300 RF DLC® Flanged Check Valve
DLC® Flanged Check Valves

3/4" 316 SS Class 150 RF DLC® Flanged Check Valve
DLC® Flanged Check Valves

1" 316 SS Class 300 RF DLC® Flanged Check Valve
OLD PART # N/A 9410 N/A 9400 N/A 9411 N/A 9401 N/A 9412
Series N/A DLC®
Size N/A 0.50 inDN 15 N/A 0.50 inDN 15 N/A 0.75 inDN 20 N/A 0.75 inDN 20 N/A 1.00 inDN 25
ASME CLASS N/A 300 N/A 150 N/A 300 N/A 150 N/A 300
Body Material N/A 316 Stainless Steel
Dimension A N/A 6.00 in152 mm N/A 4.25 in108 mm N/A 7.00 in178 mm N/A 4.62 in117 mm N/A 8.50 in216 mm
Dimension B N/A 3.75 in95 mm N/A 3.50 in89 mm N/A 4.62 in117 mm N/A 3.88 in99 mm N/A 4.88 in124 mm
Weight N/A 4.5 lb2 kg N/A 3.2 lb1.5 kg N/A 7.2 lb3.3 kg N/A 4.5 lb2 kg N/A 9.9 lb4.5 kg
Cracking Pressure CP N/A 0.29 psig0.02 bar N/A 0.29 psig0.02 bar N/A 0.24 psig0.017 bar N/A 0.24 psig0.017 bar N/A 0.36 psig0.025 bar
Temperature Rating
N/A -460 to 700 ºF-273.33 to 371.11 ºC
Pressure Rating1
N/A 720 psig49.6 barg N/A 275 psig19 barg N/A 720 psig49.6 barg N/A 275 psig19 barg N/A 720 psig49.6 barg
Working Steam Pressure N/A 435 psig N/A 110 psig N/A 435 psig N/A 110 psig N/A 435 psig
Body N/A A351 CF8M
Body Seal N/A EB WELD
Trim N/A A351 CF8M/316 SS
Seat N/A A351 CF8M
Spring N/A Inconel® X-750
Disc N/A 316 SS
ENDS N/A Flanged (RF)
ANSI N/A B16.10 B16.34 B16.5
MSS N/A SP-126 SP-25 SP-6 SP-61
Other Standards2 N/A A351GR CF8M
Cv N/A 7 N/A 7 N/A 13 N/A 13 N/A 22
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 ASME B16.34
  • 2 Contact DFT for NACE.