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EA122
Automatic Air Vent
WITH INTEGRAL SHUTOFF AND LEAK PROTECTION
PRODUCT DATA
Application
The EA122 Automatic Air Vent is a reliable venting device
and is suitable for venting of air or gas from heating systems
or heat process installations.
Features
• Integral shutoff facility
• Expanding discs prevent leakage
• Integral vacuum break
• Cleaning and exchange of the seal and inner compo-
nents can be carried out without draining the system
Range of Applicati on
Hot water heating systems, radiators, wall and ceilingmounted air heaters, air collection vess els , pipe circ uit s,
boilers and air separators.
Design
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The automatic air vent comprises:
•
Connection components
•
Integral vacuum break
•
Float housing
•
Lid
•
Float
•
Seal cap with expanding discs
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Valve seat seals
Materials
•
Brass connection components
•
High grade, heat resistant synthetic material float housing
•
High grade, heat resistant synthetic material lid
•
High grade, heat resistant synthetic material float
•
Heat resistant elastomer seal components
Specifications
Operating temperature
Operating pressure
Connection sizes
max. 110°C (230°F)
max. 6 bar (87 P.S.I.)
R 1/8" + 3/8" and R 1/2" or
optionally R 1/4" + 3/4"
Copyright © 2001 Honeywell AG • All rights reserved EN0H-184GE25 R0301
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EA122
Function
Inside the automatic air vent there is a float which operates a
lever according to the water level. When there is no water in
the housing, then the float opens the valve. Air can therefore
be vented from the heating system during filling. When the
heating system has been filled, the inflowing water closes the
valve and the vent is shut off. Water usually contains oxygen
which bubbles off during operation of the system and collects
at the highest point. The automatic air vent must therefore be
fitted at the air collection position (highest point on a boiler or
pipework circuit). The closing force of the float valve is very
small and therefore water-borne dirt can prevent the valve
fully closing which results in the valve dripping slightly. Expanding discs are built into the valve to prevent this dripping
occurring. These discs expand when wet and then shut off a
secondary valve, thereby preventing leakage.
Versions
EA122-AA = Connection sizes R 1/8" + 3/8"
EA122-BA = Connection sizes R 1/4" + 3/8"
EA122-Z = Special versions on request
Venting Capacity
Service Parts
Lid complete with float Order-No. 0900577
Leak protection discs complete
(pack of 5) Order-No. 0900761
Home and Buil ding Control
Honeywell AG Phone: (49) 2932 9880
Zu den Ruhrwiesen 3 Fax: (49) 2932 988239
D-59755 Arnsberg-Neheim [email protected] http://europe.hbc.honeywell.com
EN0H-184GE25 R0301 2 Subject to change • All rights reserved
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