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Beschikbare talen
2.3
hYDRAuLIc cONNEcTION
Follow the connection prescriptions already explained in paragraph 4.1.1 in the first part.
In particular, the sizes of the suction circuit must be suitable not to determine on the suction
pump connector:
•
a pressure value higher than 8 bar /116 psi;
•
a vacuum value higher than 0.15 bar /2,18 psi (AX and pumps at 1000, 1450 and 1750
RPM) or higher than 0.1 bar / 1,45 psi (pumps at 2800 and 3400 RPM).
When sucking, the pump must have always a filter with suitable sizes.
On the models LW, ZW, FW, HW, TW and SW there are suction and delivery connectors both
on the right and left side of the head.
2.4
PRESSURE LIMITING/ADJUSTING VALVE
In the models where it is already built-in (LW-K, ZW-K, AX), it is adjusted by the producer
so that it reaches the maximum allowed pressure for the pump by using the nozzle selection
indicated in the following table.
Remember that the data in the table are only for reference and can change according to the
system where the pump is installed.
2.4.1
Recalibration of the pressure limiting/adjusting valve
cAuTION
•
The working pressure must never overcome the maximum level scheduled for the pump (see
also paragraph "F
To recalibrate the valve, operate as follows (refer to fig. 4):
-
remove the plastic knob by pulling it towards you;
-
loose the socket head screw (m);
-
rotate the stopping ring nut (1) in counter-clockwise direction in order to partially
unscrew it;
-
set the wished pressure by operating on the hexagon knob (n) (rotating it in clockwise
direction, the pressure increases, while rotating it in counter-clockwise direction the
pressure decreases);
-
rotate the stopping ring nut (1) in clockwise direction in order to fix it;
-
tighten the socket head screw (m).
48
55
700
800
7,5
2,0
11,3
3,0
13,2
3,5
075
15,2
4,0
085
17,5
4,5
18,0
5,0
21,0
5,5
22,4
6,0
l/
US
min
gpm
38
eatures and technical data
69
90
103
110
1000
1300
1500
1600
045
035
07
055
05
06
065
095
").
117
131
138
152
1700
1900
2000
2200
03
045
04
055
045
055
055
075
075
075
08
160
172
180
207
2300
2500
2600
3000
035
04
03
045
055
055
06
055
07
07
248
276
bar
psi
3600
4000
04
035
045
05
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