Quality certificates and certifications span the globe with DK-LOK so you can rest assured your project valves and fittings will be compliant. DK-LOK is certifed with CRN, ABS, TuV, Russian GOST, DNV, GL just to name a few. And if you need additional certifications like NACE, ASTM or API, F1387, they have those too!

DK-LOK Tube Fittings & Valves DK-LOK fittings and valves are manufactured to the most stringent industry standards. As a result, DK-LOK is one of the most certified tube fitting and valve manufacturers in the world. Their guarantee is a leak-tight seal in process, power, and instrumentation applications.

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In this video, you'll learn how to properly assemble tube fittings 1 inch or smaller. DK-LOK fittings and valves are manufactured to the most stringent industry standards.
How big is the DK-LOK product line?
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DK-LOK Compression Tube Fittings & Valves are manufactured to the most stringent industry standards and guarantees a leak-tight seal in all process, power and instrumentation applications.