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Armstrong International

More than a century of sage knowledge and in-depth experience has made us uniquely skilled in designing and producing the rugged, reliable products that successfully reduce emissions and improve energy efficiency for customers all over the world. Our products and packaged solutions consistently deliver best-in-class quality as they work together to create the most intelligent system solutions. Armstrong products and packaged solutions are backed by our outstanding technical support, and our digital monitoring technology enables us to evaluate many products in real-time. Often the first to market, Armstrong International was the inventor of the inverted bucket trap, and our company holds more than 50 patents on exceptional products and software.

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For nearly 40 years, we have been helping our clients with our high competence in all control technology applications imaginable. As a RTK customer you can always be sure you're receiving comprehensive service and top quality. High-quality products ensure reliability and our experience will help you optimize control circuits and your applications.

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Spence Engineering

Spence continues its "History of Innovation" by continuing to develop and manufacture quality steam specialty and fluid control products and solutions for the HVAC and industrial marketplace. Spence has introduced several innovative, cost-saving products to the HVAC and industrial process markets including the type "J" Series Pneumatic Control Valve (1986), "Nova" NFT Series Variable Orifice Steam Traps - the first "Made In The USA" float steam trap (1992), CDH Series patented thermostatic sanitary steam trap (2001) and the "CoMBo" CME Series - the industry's first condensate measuring elbow thermostatic steam trap (2006).

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Warren Controls

Dependable, rugged, precision control valves and accessories.

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