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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.
Features
  • Dielectric sleeve prevents galvanic corrosion
  • NPT and sweat connections
  • 1/4 turn open/close lever-style handle
  • Dual Buna N O-ring seals prevent stem leaks
  • Corrosion-resistant brass body and flange
  • Slotted flange bolt holes
  • Rotating flange is faster and easier to install
  • Includes mounting nuts and bolts

Specifications

Materials

  • Brass (Valve & Stem)
  • Cast Iron/Chromate (Flange)
  • Chrome-Plated Brass (Ball)
  • Buna-N (Stem O-Rings)
  • PTFE (Seat)

Performance Range

  • Maximum working Pressure: 150 psig (10.3 bar)

Temperature

  • Maximum Operating temp: 250° F (121° C)

Size

  • 0.5 - 1.5 inches

  • 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.
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