DK-Lok DMC Tube-to-Male NPT Straight Connector, SS316

The DK-Lok DMC series is a straight male connector: a compression tube fitting that joins instrument tubing in line to a male NPT pipe thread with no change of direction. It is the usual way of landing tubing on a gauge, a valve, a manifold or a threaded process tapping.

Sealing is by the two-ferrule mechanism. As the nut is tightened the back ferrule advances the front ferrule into the taper of the body, so that the front ferrule seals against the body while the back ferrule grips the tube and holds vibration and pressure cycling away from the seal. Body, nut and both ferrules are 316 stainless steel, which suits the fitting to corrosive media and to outdoor plant.

Typical service is instrument impulse and control lines, sampling and analyser tubing, hydraulic and pneumatic circuits, and general process and utility lines.

When ordering, give the tube outside diameter and the NPT thread size together. The two ends are sized independently, most tube sizes are offered against several thread sizes, and not every combination is made; the models table lists each available combination with its model code and part number.