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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
Unit of Measure

OLD NPT #

OLD PART #

 N/A 9411

Inventory

Inventory

 N/A {0}

Specifications

Series

 N/A DLC®

Size

 N/A 0.75 inDN 20

ASME CLASS

 N/A 300

Dimension A

 N/A 7.00 in178 mm

Dimension B

 N/A 4.62 in117 mm

Weight

 N/A 7.2 lb3.3 kg

Cracking Pressure CP

 N/A 0.24 psig0.017 bar

Temperature Rating

 N/A -40 to 400 ºF-40 to 204.44 ºC
Pressure Rating1
N/A 720 psig49.6 barg

Working Steam Pressure

 N/A 515 psig

Body Seal

 N/A EB WELD

ENDS

 N/A Flanged (RF)

Cv

 N/A 13

Materials of Construction

Body Material

 N/A 316 Stainless Steel

Body

 N/A A351 CF8M

Trim

 N/A A351 CF8M/316 SS

Seat

 N/A TFE®-Viton®

Spring

 N/A Inconel® X-750

Disc

 N/A 316 SS

Codes and Standards

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

Features

N/A

  • ANSI B16.10 Face-to-Face dimensions
  • Spring-assisted silent closing, non-slam
  • 1/2" to 3" Line size
  • ASME 150 and 300
  • Stainless Steel Construction
  • Raised Face Flanged ends
  • Inconel® X-750 spring
  • Electron beam welded body
  • Meets ASME B16.34 - 2004
  • Horizontal or vertical installation
  • Body guided disc
  • Tight shut-off - lapped disc & seat
  • Simplified construction - 4 parts
  • Versatile

Options

N/A

  • 316 SS Springs
  • Body Materials
    - Alloy 20
    - Hastelloy® C
    - NACE
  • Soft-Seat (Teflon Encapsulated Viton only)

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

  • 1 ASME B16.34
  • 2 Contact DFT for NACE.