The AVA and AVV ‘float’ type automatic air vents from Armstrong efficiently remove accumu-
lated air from hydronic systems. Hydronic installations must be free of air to minimize noise
and maximize heat transfer throughout the system. Typical applications of Series AVA and
AVV air vents include any hydronic heating or cooling system that requires the elimination of
entrained air.
Armstrong Circulator Isolation Flanges (CIF) are used in pairs to connect circulating pumps in hydronic
systems. These devices rapidly isolate a circulator for service and eliminate the need to drain and refill
the entire system. The CIF 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, economical and easily-serviced hydronic system.
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Automatic Air Vents
Armstrong manufactures a comprehensive line of hydronic specialty products including valves, float type air
vents and air removal traps. Armstrong hydronic specialty items are specifically designed with ease of instal-
lation and maintenance in mind, and constructed to provide years of service under the most demanding con-
ditions. Additional hydronic specialty items not shown below include: reducing valves, relief valves, tank fit-
tings, air chargers and tank drainers and air purgers.
Armstrong’s economical, C11 brass-construction relief and reducing valves feature built-in
strainer and extra large diaphragm. The reducing valve is equipped with an anti-siphon check
valve feature, and is easily adjusted to meet system requirements. The special composition
valve disc is set on brass, ensuring quiet operation.
Hydronic Specialties
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Flo-Control Valves
Armstrong Flo-Control valves prevent gravity circulation in a hydronic system when the circulating
pump is not running. When the pump starts, the Flo-Control valve opens automatically to permit
circulation of water in the heating system. Flo-Control valves are available from
3
/
4
to 3 inches
(19 to 76 mm).
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Combination Valves
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Flex Flanges
Armstrong Flex Flanges help make initial circulator installation easier and future mainte-
nance faster. The rotating flanges eliminate the need for perfect alignment before circulator
installation and the integral check valve saves two pipe connections compared to a separate
check valve. Additionally the dielectric flange coupling helps reduce pipe corrosion by avoid-
ing contact of dissimilar metals. For future servicing ease, the integral ball valves enable the
circulator to be isolated from the system for removal or replacement, without draining the
entire system.
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Circulator Isolation Flanges
