Pratissoli KSR Serie Manuel D'utilisation Et D'entretien page 39

The booster pump must always be started up
before the plunger pump.
It is advisable to install a pressure switch on the
supply line downstream of the filters protecting
the pump.
For any supply conditions other than those specified
above, contact our Technical Office or Customer
Service Department.
9.6 Suction line
For smooth operation of the pump, the suction line must have
the following characteristics:
1. Minimum inside diameter as indicated in the graph in par.
9.9 and in any case greater than or equal to the diameter
at the pump manifold.
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.
2. The layout must be such as to prevent cavitation
problems.
9.7 Filtration
Two filters must be installed on the pump suction line, positioned as indicated in Fig. 7 and Fig. 7/a.
With a manually activated control valve
Inlet
Supply tank
With pneumatic control valve
Inlet
Supply tank
3. Completely airtight and constructed to ensure a perfectly
4. Prevent the pump from emptying when it is stopped,
5. Do not use 3 or 4-way hydraulic fittings, adapters, swivel
6. Do not install Venturi tubes or injectors for detergent
7. Avoid use of foot valves or other types of unidirectional
8. Do not recirculate the by-pass valve drain directly to the
9. Provide for proper guards inside the tank to prevent that
10. Make sure the suction line is thoroughly clean inside
Bypass
1 Filter 1
2 Booster Pump
3 Filter 2
4 Pressure gauge
Bypass
39
hermetic seal through time.
including partial emptying.
joints, etc. as they could jeopardize pump performance.
suction.
valves.
suction line.
water flow from the bypass and the tank supply line can
create vortexes or turbulence near the pump supply pipe
port.
before connecting it to the pump.
1 Filter 1
2 Booster Pump
3 Filter 2
4 Pressure gauge
5 Pressure switch
6 Plunger pump
5 Pressure switch
6 Plunger pump
7 Pressure gauge
8 Safety valve
7 Pressure gauge
8 Safety valve
9 Accumulator
10 Control valve
Fig. 7
9 Accumulator
10 Pneumatic control
valve
Fig. 7/a