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

DK-LOK DX Union Cross

The DK-LOK DX is a union cross twin-ferrule tube fitting with four tube connection ports arranged in a cross, joining four tube lines of the same outside diameter. It provides a leak-free double-ferrule seal on every port. Material is not indicated by this base code, so the alloy must be verified by full part number; 316 stainless and carbon steel variants exist.

Key Features

Four-port union cross for joining four same-size tube ends
Twin (double) ferrule compression seal on each port
Reusable, predictable swaging make-up
Available in fractional and metric tube OD sizes
Leak-tight under high pressure, vacuum, impulse, and vibration
Carbon steel variants white zinc plated; 316 SS also offered

Technical Specifications

Brand: DK-LOK
Part Code: DX
Type: Union Cross (Tube-to-Tube)
Fitting Type: Union Cross
Ferrule Design: Twin / double ferrule
Body Material: 316/316L Stainless Steel (-S), Brass (-B), Carbon Steel (-C), Super Duplex (-SD), Alloy 20 (-L20) – set by suffix
Ports: 4 (cross configuration)
Temperature Rating: 316 SS material rated -425°F to 1200°F (-253°C to 649°C) per DK-LOK; final rating governed by the tubing and service – call for your application
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.