Product Overview
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15
30
45
60
0
4
2
psi
bar
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15
30
45
60
0
4
2
psi
bar
”
”
”
”
E
D
E
F
D
C
C
A
A
A
A´
B
B
B
D
C
0
0
A´
A´
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15
30
45
60
0
4
2
psi
bar
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15
30
45
60
0
4
2
psi
bar
”
”
”
”
E
D
E
F
D
C
C
A
A
A
A´
B
B
B
D
C
0
0
A´
A´
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15
30
45
60
0
4
2
psi
bar
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15
30
45
60
0
4
2
psi
bar
”
”
”
”
E
D
E
F
D
C
C
A
A
A
A´
B
B
B
D
C
0
0
A´
A´
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0
15
30
45
60
0
4
2
psi
bar
Dimensions Construction details
Pre-calibration
The AutoFill
™
features a pressure
setting indicator as shown. Before
filling the system, use a
screwdriver to turn dial to the
intended system pressure.
Anti-scale materials
The central housing containing
the moving parts and the
internal compensating spindle are
made of a low adhesion coefficient
plastic. This material minimizes the
risk of formation of scale deposits,
the main cause of malfunctions.
Diaphragm-seat seal
The useful working surface of the
diaphragm is particularly large, in order to maintain stable pressure
in a system at
a preset value
regardless
ofinlet pressure
variations. This
feature is also
useful in that it gives greater power to
the sliding of the spindle and overcomes
friction. Due to the low flow rates,
the AutoFill
™
seat has been designed
with the smallest possible diameter.
This guarantees greater precision and
sensitivity to maintain its operating
characteristics unchanged over time.
Spindle guide
In order to reduce the frictional surfaces, the spindle unit guide has
been positioned in
the upper part of the
device. It consists of
four spokes formed
directly on the plastic
central support.
Removable filter
cartridge
The cartridge containing the operating mechanisms, protected by a
large surface area strainer,
is removable. This permits
easy and quick inspections,
internal cleaning and
cartridge replacement.
Fast filling
The AutoFill
™
fast fills the
system to set pressure, up
to 5-1/2 gpm filling rate, then
automatically
shuts offthe
water feed.
Code A A´ B C D E
553542A
1
⁄2" NPT
1
⁄2" NPT 4 ¾"
__
1
15
⁄16" 4"
553549A
1
⁄2" SWT
1
⁄2" NPT 4 ¾"
__
1
15
⁄16" 4"
553642A
1
⁄2" NPT
1
⁄2" NPT 4 ¾" 5 ¾" 1
15
⁄16" 4"
553649A
1
⁄2" SWT
1
⁄2" NPT 4 ¾" 5 ¾" 1
15
⁄16" 4"
Code A A´ B C D
573403A
1
⁄2" NPT
1
⁄2" NPT
1
⁄2" 4
3
⁄4" 1
3
⁄8"
573503A
3
⁄4" NPT
3
⁄4" NPT
1
⁄2" 4
5
⁄8" 1
3
⁄8"
573409A
1
⁄2" SWT
1
⁄2" SWT
1
⁄2" 4
5
⁄8" 1
3
⁄8"
573493A
1
⁄2" SWT
1
⁄2" NPT
1
⁄2" 4
11
⁄16" 1
3
⁄8"
Code A A´ B C D E F
573002A
1
⁄2" NPT
1
⁄2" NPT
1
⁄2" 9
1
⁄8"
__
1
3
⁄8" 4"
573009A
1
⁄2" SWT
1
⁄2" NPT
1
⁄2" 9
1
⁄8"
__
1
3
⁄8" 4"
573012A
1
⁄2" NPT
1
⁄2" NPT
1
⁄2" 9
1
⁄8" 10¼" 1
3
⁄8" 4"
573019A
1
⁄2" SWT
1
⁄2" NPT
1
⁄2" 9
1
⁄8" 10¼" 1
3
⁄8" 4"