DFT Durabla Inc.





BSS Basic Check Valve


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The DFT® Basic-Check valve is a versatile all-purpose, spring-assisted, in-line check valve that provides reliable, low maintenance service for a wide range of liquids and gases at various pressure/temperature combinations. The valve consists of a guard cage, spring, valve disc, retaining ring and seat. It can be combined with pipe fittings such as reducing couplings, drain elbows, etc. to form a complete check valve unit ideally suited for a broad range of pipeline applications or incorporated into machinery for OEM applications. The metal-to-metal sealing area of the Basic-Check valve’s disc and seat is precision lapped, providing very tight shut-off of both gas and liquid. If bubble-tight shut-off is required, resilient soft seats are available.

Features:

  • 1/4" to 2 1/2” Line size
  • 450 to 6000 CWP
  • Threaded ends
  • Stainless steel construction
  • Spring-assisted silent closing
  • Horizontal or vertical installation
  • Tight shutoff - lapped disc ∓ seat
  • Easy maintenance
  • Versatile
  • Options:
    • Inconel® X-750 spring
    • Soft seat


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BSSV Vacuum Breaker


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DFT® Vacuum Breakers provide effective protection against collapse of pressure vessels, tanks and rolls. They prevent condensate "back-up" when equipment is shut down or inlet steam is reduced by modulating control valves. In piping systems, DFT® Vacuum Breakers are used to break siphons, prevent pipe collapse during transient pressure drops, and to provide addition of air on the downstream side of check valves to dampen water hammer.

Features:

  • 1" to 4” Size (Outside Diameter)
  • 450 to 6000 CWP
  • Threaded O.D. (MNPT)
  • Unthreaded Inlet Bore
  • Stainless steel construction
  • Spring-assisted silent closing
  • Horizontal or vertical installation
  • Tight shutoff - lapped disc ∓ seat
  • Easy maintenance
  • Versatile
  • Options:
    • Inconel® X-750 spring
    • Soft seat


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SCV Threaded Check Valves


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The DFT® Model SCV 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 SCV provides tight shut-off and protects other equipment in the system from water hammer. Its stainless steel construction insures a long service life.

750CWP is rated to 470°F.

Features:

  • 1/2" to 3” Line Size
  • 750 to 3600 CWP
  • NPT & SW Ends
  • Stainless steel construction
  • Inconel® X-750 spring
  • Spring-assisted silent closing
  • Zelon® "O" ring body seal
  • Horizontal or vertical installation
  • Body-guided Disc
  • Tight shutoff - lapped disc ∓ seat
  • Simplified 5-part construction
  • Easy maintenance
  • Versatile
  • Options:
    • 316 SS Springs
    • Body seal weld
    • Soft seat
    • Alloy 20 body & seat (ASME 300)
    • Hastelloy® C Body & Seat (ASME 300)
    • NPT x socket weld ends
    • SCV-R (higher cracking pressure)
    • Butt weld ends
    • NACE


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