CALEFFI DISCAL 551 Series, Installation, Commissioning And Servicing Instructions

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Function
Air separators are used to continuously remove the air contained
in the hydronic circuits of heating and cooling systems. The air
discharge capacity of these devices is very high. They are capable
of removing automatically all the air present in the system down to
micro-bubble level.
The circulation of fully de-aerated water enables the equipment to
operate under optimum conditions, free from any noise, corrosion,
localized overheating or mechanical damage. Micro-bubbles, fusing
with each other, increase in volume (get larger) until they become
large enough to rise to the top where they are automatically
released.
Product range
551 series DISCAL ® air separator for horizontal pipes, in brass compact with drain
Sizes ¾” sweat; ¾” NPT female (A without service check valve, AC with service check)
551 series DISCAL ® air separator for horizontal pipes, in brass with drain
Sizes ¾” - 1” - 1 ¼” - 1 ½” - 2” NPT female; 1” - 1 ¼” - 1 ½” - 2” sweat
(A without service check valve, AC with service check)
551 series DISCAL ® air separator for horizontal pipes, in brass with drain
Sizes 1” - 1 ¼” press (A without service check valve, AC with service check)
551 series DISCAL
®
air separator for horizontal pipes, in steel with flanged connections with drain
Sizes 2” – 6” ANSI
NA551 series DISCAL ® air separator for horizontal pipes, in steel with flanged connections with drain
designed and built in accordance with Section VIII, Division 1 of the ASME Boiler and
Pressure Vessel Code and tagged and registered with the National Board of Boiler
and Pressure Vessel Inspector
Sizes 2” – 12” ANSI
NA5519 series DISCAL ® air separator for vertical pipes, in brass compact with drain
Sizes ¾” and 1” sweat
Installation, commissioning and servicing instructions
38456.08
www.caleffi.com
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551- NA551 - NA519 Series
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DISCAL
®
air separator