General Pump LK Owner Manual - Manual (Page 14)

Page 14
GENERAL PUMP
A member of the Interpump Group
LK SERIES
The filter must be installed as close as possible to the pump, should allow easy inspection and have the following
characteristics:
1. Flow rate minimum 3 times greater than the pump’s flow rate.
2. Diameter of the entry/exit apertures not less than the diameter of the pump’s inlet port.
3. Filtration grade ranging between 200 and 360 µm.
For the pump to operate efficiently, the filter must be cleaned periodically. The cleaning frequency will
need to be planned according to the actual use of the pump, and it should also take into account the qual-
ity of the water used and the effective congestion conditions.
9.7 Outlet Line
For a correctly installed outlet or delivery line, follow these specifications:
1. The internal diameter of the hose must be sufficient to ensure the correct speed of the fluid; see
diagram in paragraph 9.8.
2. The first section of hose connected to the pump must be flexible in order to isolate pump vibrations
produced by the pump from the rest of the system.
3. Use high pressure hoses and fittings that guarantee wide safety margins in any working condition.
4. Install a safety valve on the outlet line.
5. Use pressure gauges suitable for the pulsating loads typical of plunger pumps.
6. In the design phase, take into proper account the pressure drop along the line, since this causes a
reduction in usage pressure with respect to the value measured at the pump.
7. If the pump pulsations are harmful for particular applications, install an appropriately sized pulsation
dampener on the outlet line.