Swagelok SS-1VS8 316 stainless steel integral bonnet needle valve with black phenolic knob, 1/2 inch Swagelok tube fitting

DK-LOK DUR-B Reducing Union (Brass)

The DK-LOK DUR-B is a brass reducing union twin-ferrule tube fitting that connects two tube lines of different outside diameters in a straight-through configuration. The '-B' designation indicates brass construction. It provides a reusable double-ferrule seal on both tube ends.

Key Features

Brass reducing union joins two different tube OD sizes
Twin (double) ferrule compression seal on each end
Brass body for general-purpose and lower-corrosion service
Available in fractional and metric tube OD sizes
Reusable, predictable swaging make-up
Conforms to ASTM F-1387 (twin-ferrule fitting standard)

Technical Specifications

Brand: DK-LOK
Part Code: DUR-B
Type: Reducing Union (Tube-to-Tube)
Fitting Type: Reducing Union
Ferrule Design: Twin / double ferrule
Body Material: Brass
Standard: ASTM F-1387
Tube OD Range: 1/16 in. to 2 in. (fractional); 2 mm to 38 mm (metric)
Design Standard: Twin-ferrule fitting, tested to ASTM F1387
Working Pressure: Rated by tube size and wall thickness per the DK-LOK catalog. Call for quote.