Dukes, Inc. is an industry leader in the design, manufacture and aftermarket support of environmental control systems and components. A wide variety of both poppet and butterfly designs have been produced for over 50 years. In addition, custom made products can be designed and manufactured to meet specialized and demanding requirements.

Capabilities include temperature control, mixing valves, sensors, shut off, flow control, and pressure regulator valves. Current airframe applications include military, large commercial, regional airline, general aviation and corporate aviation aircraft.

Aftermarket retrofit programs are available on many different aircraft certified under FAA Parts Manufacturer Approval (PMA) and Supplemental Type Certificate (STC) Programs.