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Idiomas disponibles
Idiomas disponibles
9.7
Filtration
On the pump suction line it is necessary to install a filter, located as near as possible to the pump (diagrams Fig. 6 and Fig. 6/a)
and easy to inspect, with the following features.
1. Minimum flow rate at least 3 times the nominal flow rate of the pump.
2. Inlet/outlet port diameters no smaller than the inlet port diameter of the pump.
3. Filtration grade between 200 and 360 µm.
With a manually activated control valve
Inlet
Supply tank
With pneumatic control valve
Inlet
Supply tank
For smooth pump operation, regular filter
cleaning is necessary, planned according to the
actual use of the pump in relation to the quality
of water used and actual clogging conditions.
9.8
Outlet line
For correct design of the outlet line comply with the following
installation prescriptions:
1. The internal diameter of the pipe must be sufficient to
ensure correct fluid velocity, see graph in par. 9.9.
2. The first section of the line connected to the pump outlet
must be a flexible hose, in order to isolate vibration
produced by the pump from the rest of the system.
3. Use high pressure pipes and fittings to ensure high safety
margins in all operating conditions.
4. The outlet line must always be provided with a Max.
pressure valve.
1 Booster pump
2 Filter
3 HT series pump
4 Pressure gauge
5 Safety valve
6 Manual control valve
Bypass
1 Booster pump
2 Filter
3 HT series pump
4 Pressure gauge
5 Safety valve
6 Pneumatic control valve
Bypass
5. Use pressure gauges capable of withstanding the
pulsating loads typical of plunger pumps.
6. During the design stage, keep in mind the line pressure
drops that lead to a pressure reduction at the user with
respect to the pressure measured on the pump.
7. For those applications where pulses produced by the
pump on the outlet line may prove harmful or unwanted,
install a pulsation dampener of sufficient size.
9.9
Calculation of the internal diameter of the
duct pipes
To determine the internal diameter of the duct, refer to the
following diagram:
Suction duct
With a flow rate of ~ 170 l/min and a water velocity of
0.5 m/sec. The graph line joining the two scales meets the
central scale showing the diameters, corresponding to a value
of ~ 80 mm.
27
Fig. 6
Fig. 6/a
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