Idiomas disponibles
Idiomas disponibles
Water temperature
For negative prevalence contact our Technical or
Customer Service Departments.
9.6
Suction line
For smooth operation of the pump, the suction line must have
the following characteristics:
1. Minimum internal diameter as indicated in the graph in
par. 9.9 and in any case equal to or exceeding that of the
pump head.
Localized restrictions should be avoided along the
piping, as these can cause pressure drops resulting
in cavitation. Avoid 90° elbows, connections with
other piping, restrictions, reverse gradients, inverted
U-curves and Tee connections.
9.7
Filtration
1 filter must be installed on the pump suction line, positioned as indicated in Fig. 6 and Fig. 6/a.
With a manually activated control valve
Inlet
Supply tank
2. The layout must be made so as to ensure a minimum
positive head under all operating conditions of 0.20 m
(0.02 bar) and a maximum one of 80 m (8 bar) measured
on the pump supply; this minimum value applies for
cold water with temperature up to 20 °C, for higher
temperatures refer to the specific graph (par. 9.5).
The pumps can also operate with a lower supply pressure,
under certain operating conditions expressly authorized
by our Technical or Customer Service Departments.
3. Completely airtight and constructed to ensure a perfectly
hermetic seal through time.
4. Prevent the pump from emptying when it is stopped,
Head
including partial emptying.
5. Do not use 3 or 4-way hydraulic fittings, adapters, swivel
joints, etc. as they could jeopardize pump performance.
6. Do not install Venturi tubes or injectors for detergent
suction.
7. Avoid use of foot valves or other types of unidirectional
valves.
8. Do not recirculate the by-pass valve drain directly to the
suction line.
9. Provide for proper guards inside the tank to prevent that
water flow from the bypass and the tank supply line can
create vortexes or turbulence near the pump supply pipe
port.
10. Make sure the suction line is thoroughly clean inside
before connecting it to the pump.
1 Filter 1
2 Plunger pump
3 Pressure gauge
4 Safety valve
5 Manual control valve
Bypass
26
Fig. 6
