Materials, Pressure-temperature, Basic construction – Watts HAV User Manual
Page 2: Capacity
MATERIALS
The HAV Air Vent is manufactured in two parts (body
and disc cartridge).
• Chromed Brass - body
• Brass - disc bearing cover
• Stainless steel - check valve
• Copper - thermostat assembly
• Neoprene - O-ring
• Heat resistant ABS plastic material - handwheel
• Special cellulose fiber - disc
A periodic check of the condition of the discs will
establish the need for replacement. When the discs
are damaged, the valve can only operate manually;
to restore to automatic working, the cartridge must
be replaced.
To replace the cartridge, unscrew the handwheel,
clean the seat of the valve of any foreign matter and
then assemble a new disc cartridge. The body con-
tains a check valve, preventing water leakage, there-
fore, this operation can be carried out without drain-
ing the water from the radiators.
PRESSURE-TEMPERATURE
Suitable for water only additives: Only inhibited glycol
based additives are permissible.
Maximum Working Pressure:
125 psi (8.6 bar)
Minimum Working Pressure:
1.45 psi (10 kPa)
Maximum Water Temperature: 240
°F (116°C)
Minimum Water Temperature:
140
°F (60°C)
Test Pressure:
130 psi (9 bar)
Maximum Steam Pressure:
10 psi (69 kPa)
BASIC CONSTRUCTION
ES-HAV 9844
© Watts Regulator Co., 1996
Printed in U.S.A.
CAPACITY
2.12
1.77
1.41
1.06
.71
.35
0
0
14.2
28.4
42.7
56.9
71.1
85.3
99.5
113.8
128 psi
0
.98
2.0
2.9
3.9
4.9
58.8
6.8
7.8
8.8 bars
Correct Installation/Maintenance
Incorrect Installation/Maintenance
15
1
⁄
8
" -
1
⁄
4
"
OK
Min. 90"
.47"
1.14"
1.61"
15
1
⁄
8
" -
1
⁄
4
"
.43"
Diagram 1
Venting Capacity
Diagram 2
12
11
10
9
8
7
6
5
4
3
2
1
0
86
104 122 140 158 176 194 212 230 248
°F
30
40
50
60
70
80
90 100 110 120
°C
Water Temperature
Drying Time in Hours
SCFM