Flex Flanges are used in pairs to connect circulating pumps in hydronic systems. Armstrong Flex Flanges rapidly isolate a circulator for service, and eliminate the need to drain and refill the entire system.
Armstrong Flex Flange is a rotating flange designed to allow maximum installation flexibility regardless of pump flange orientation. Flex Flange units are available with a spring check valve to prevent the heating medium flowing in the wrong direction in the event of gravity circulation.
The Flex Flange integrates a 2-bolt flange connection (common to small circulating pumps) with a full-port ball valve. This practical "all-in-one" design reduces the number of plumbing connections and results in a more reliable and easily-serviced hydronic system.
Valve and Stem: Brass
Flange: Cast Iron/Chromate
Ball: Chrome plated brass
Stem O-Rings: Buna N
Max working pressure: 150 psig (10.3 bar)
Max operating temp: 250°F (121°C)
0.5 - 1.5 inches
Ready to purchase? Need some help or have questions? Contact one of our closest reps.
We thoroughly examine how and where energy is being used in your business and buildings and then tell you exactly where efficiencies and savings can be found.
resources & tools
We have a suite of free online support materials and tools. Find the essentials to learn, apply, and maintain Armstrong equipment.
We are happy to help. Discuss your project and product needs with us, check the status of your shipments, or let us save the day in an emergency.