Brochure

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AUTOMATIC AIR VENTS
High-performance automatic air vent for
solar heating systems.
Working temperature range: -20—320ºF.
Max. working pressure: 150 psi.
Max. discharge pressure: 150 psi.
251
DISCALAIR
®
Code Description Lbs USD
251004A ½" MNPT 0.8 119.00
Shut-off ts automatic air vent.
Working temperature range: -20—360ºF.
Max. working pressure: 150 psi.
NA292
Vent cap adapter to connect discharge
tube. Fits all air vents and air separators
except 5026 and 5027 series.
NA102
Code Description Lbs USD
NA10204 ¼" MNPT 0.1 18.50
Code Description Lbs USD
NA29284 ½" FNPT x ½" MNPT 0.2 43.40
Function
Automatic air vents are used in
the closed circuits of solar heating
systems. They allow air contained
in the uid to be released
automatically during the lling
process, through a valve operated
by a oat in contact with uid in the
system.
The shut-off valves are used in
combination with the automatic air
vents to isolate them after lling
the circuit of solar heating systems.
These series of products have
been specially made to work at
high temperatures with a glycol
medium.
Automatic air vent for solar systems.
Working temperature range: -20—360ºF.
Max. working pressure: 150 psi.
Max. discharge pressure: 75 psi.
250
Code Description Lbs USD
250041A ½" FNPT and ¾" MNPT 0.3 55.90
Function
DISCALAIR
®
solar devices are
used in hydronic systems or in
the lling and start-up phase
of solar heating systems to
discharge evenly discharge large
quantities of air that have formed
in the circuits. This function is
performed even when there is
considerable pressure due to the
special geometry of the discharge
mechanism, which is identical to
the mechanism on DISCAL
®
Solar
251 series air separators.
This particular series of automatic
air vent valves have been
specically designed to work at
high temperature with a glycol
medium, which is typical of solar
heating systems.