DK-LOK Instrumentation Valves & Fittings serve many industries.  Here are just some of the industry application where we can help you achieve reliable, leak-free connections and precision valve performance:

Chemical Plants

Condensate Stabilization & Vapor Recovery Units

Gas Compressing Plants

Pharmaceutical Manufacturing

Offshore Platforms

Gas Processing & Treatment Plants

Nuclear, Gas, and Coal-fired Power Plants

CNG/NGV Industry (applications shown:  Shut-off ball valves for control panel on Ford commercial NGV truck, and mobile CNG refilling unit.)

Semiconductor Manufacturing

Oil Refineries


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Honesty, commitment, and quality


DFW Valve & Fitting is an affiliated company of Kirby Oil Field Supply LLC

So many reasons to make the switch to 
DK-Lok Valves &
  • Highest Quality Products
  • Reliable, Leak-Free Connections
  • Broad Product Line
  • Very Attractive Pricing
  • Interchangeable with Swagelok
  • Exceptional Service & Support