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Product Overview

ManualsBrandsCaleffi ManualsAir ValvesPLUMBVENT Automatic Air Vent w/ Hygroscopic Safety Air Vent Cap (1/2" NPT)
12
• Operating mechanism
The function of this device is
guaranteed by an operating
mechanism specially designed
to vent when system pressure
is high.
• Antivibration and antirotation
system on the float
This guarantees that in the rest
position the air relief valve will not
be affected by any movement
of the float.
Construction details
Typical application drawings
Air flow
Flow rate
3.5
4.5
4.5
5.5
5.5
6.5
3.5
2.5
2
.5
1.5
1.5
0.5
0
90
80
70
60
50
40
30
20
10
0
(bar) (psi)
)s/lN( )MFCS(MFCS
1
0.1
0
0.5
0.9
0.8
0.7
0.6
0.4
0.3
0.2
1.2
1.1
0
2.5
0.25
0.5
0.75
1
1.25
1.5
1.75
2
2.25
1
0,1
0
0,5
0,9
0,8
0,7
0,6
0,4
0,3
0,2
1,2
1,1
Air flow
Flow rate
3.5
4.5
4.5
5.5
5.5
6.5
3.5
2.5
2
.5
1.5
1.5
0.5
0
90
80
70
60
50
40
30
20
10
0
(bar) (psi)
)s/lN( )MFCS(MFCS
1
0.1
0
0.5
0.9
0.8
0.7
0.6
0.4
0.3
0.2
1.2
1.1
0
2.5
0.25
0.5
0.75
1
1.25
1.5
1.75
2
2.25
1
0,1
0
0,5
0,9
0,8
0,7
0,6
0,4
0,3
0,2
1,2
1,1
Tankless
water
heater
Automatic
air vent
Automatic
air vent
Automatic
air vent
CW
supply
Recirculation
circulator
WATER
HEATER
HW Supply
STORAGE
TANK
or
CW Supply
SPECIFICATION SUMMARIES
NA502640A
Automatic air vent. 1/2" threaded NPT male connection. DZR low-lead brass body and cover (<0.25% lead content), meets
requirements of IPC, IRC, UPC, NPC and ANSI/NSF 372-2011,
California Health and Safety Code 116875 S.3874 (AB1953),
and
Vermont S152, as
certified b
y ICC-ES
. Moplen EP548S float and peroxide-cured EPDM seals. Maximum working pressure 150
psi (10 bar). Maximum discharge pressure 90 psi (6 bar). Maximum working temperature 240°F (115°C). Float with anti-rotation and
anti-vibration system. Vertical discharge. Provide with inlet isolation valve, separately-sourced and field installed.
We reserve the right to change our products and their relevant technical data, contained in this publication, at any time and without prior notice.
Caleffi North America, Inc.
3883 W. Milwaukee Road
Milwaukee, WI 53208
Tel: 414-238-2360 · Fax: 414-238-2366
sales@caleffi.com · www.caleffi.com
© Copyright 2018 Caleffi North America, Inc.
Operating instructions
The automatic air vent comes complete with a safety hygroscopic cap
that automatically closes the air discharge in case of contact with
water. The hygroscopic cap does not provide an airtight seal, even
when closed. If pressure testing is required, replace the hygroscopic
cap with a plastic cap (Caleffi code R56214) or install an isolation valve
beneath the vent. For normal automatic venting, this cap should be
screwed down finger tight.