DK-LOK DU-B brass twin-ferrule tube union

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

DK-LOK DU-B Union (Brass)

The DK-LOK DU is a twin-ferrule union designed to connect two individual tube lines of the same outside diameter together. The ‘-B’ designation indicates brass body construction. It uses DK-LOK’s double-ferrule compression mechanism for a leak-free, reusable, gas-tight seal.

Key Features

Twin (double) ferrule compression design for reliable, reusable sealing
Connects two same-size tube ends in a straight-through union
Brass body construction for general-purpose, lower-corrosion-risk service
Available in fractional and metric tube OD sizes
Leak-tight performance under vibration, vacuum, and impulse conditions
Interchangeable with industry-standard twin-ferrule fitting systems

Technical Specifications

Brand: DK-LOK
Part Code: DU-B
Type: Union (Tube-to-Tube)
Fitting Type: Union
Ferrule Design: Twin / double ferrule
Body Material: Brass
Size Basis: Fractional and metric tube OD (size not specified in this code)
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.