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CALEFFI
High-performance automatic air vent
38572.01
© Copyright 2009 Caleffi
Function
The DISCALAIR is a high performance automatic air vent that is capable of
releasing large amounts of air from hydronic systems. The venting mechanism
is the same proven design that is used in Caleffi's 551 series air separators,
providing years of reliable service.
Product range
Code 551004A DISCALAIR high performance automatic air vent
Technical specification
Connections:
Materials: - Body brass
Suitable fluids: water, glycol solution
Max percentage of glycol: 50%
Max working pressure: 150 psi (10 bar)
Max discharge pressure: 150 psi (10 bar)
Temperature range: 32÷250°F (0÷120°C)
551 Series
size 1/2” NPT female
1/2”
NPT female
- Float PP
- Stem brass
- Seals EPDM
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SAFETY INSTRUCTION
This safety alert symbol will be used in this manual to draw attention to safety related
instructions. When used, the safety alert symbol means ATTENTION! BECOME ALERT!
YOUR SAFETY IS INVOLVED! FAILURE TO FOLLOW THESE INSTRUCTIONS MAY
RESULT IN A SAFETY HAZARD.
CAUTION: All work must be performed by qualified personnel trained in the
proper application, installation, and maintenance of systems in accordance
with all applicable codes and ordinances.
CAUTION: If the Discalair valve is not installed, commissioned and
maintained properly, according to the instructions contained in this
manual, it may not operate correctly and may endanger the user.
CAUTION: Make sure that all the connecting pipework is water tight.
CAUTION: When making the water connections, make sure that the
pipework connecting the Discalair is not mechanically over-stressed. Over
time this could cause breakages, with consequent water losses which, in
turn, could cause harm to property and/or people.
CAUTION: Water temperatures higher than 100°F (38°C) can be
dangerous. During the installation, commissioning and maintenance of the
Discalair valve, take the necessary precautions to ensure that such
temperatures do not endanger people.
Leave this manual for the user.
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Installation
The DISCALAIR automatic air vent, series 551, must be installed in a vertical position. They
are typically installed on the manifolds, on the rising main and in the points of the circuit where
air bubbles are concentrated and must be vented.
Attention
The installation of the valve in places subject to freezing is not
recommended. In the case of installation in locations that cannot be
inspected, it is recommended to replace the upper caps with the
safety hygroscopic caps, code 59681. To allow for the venting of the
air during normal operation, the upper cap must be loose (tight in the
hygroscopic version).
Maintenance
The DISCALAIR automatic air vent valve is designed to enable the
inspection of the internal mechanism.
The accessibility to the moving parts that control the air outlet is
obtained by simply removing the upper cover. The body is also
detachable from the lower part connected to the piping.
It is recommended to install a shut-off valve before the DISCALAIR
device to simplify any maintenance operations.
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CALEFFI
Caleffi North America, Inc.
3883 West Milwaukee Road
Milwaukee, WI 53208
T: 414.238.2360 F: 414.238.2366
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