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

Pharmaceutical Manufacturing

Chemical Plants

Oil Refineries

Nuclear, Gas, and Coal-fired Power Plants

Gas Processing & Treatment Plants

Condensate Stabilization & Vapor Recovery Units

Gas Compressing Plants

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:


Semiconductor Manufacturing

Offshore Platforms

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

Authorized Dealers for:

Honesty, commitment, and quality


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