General Pump MW Owners Manual - Manual (Page 15)

GENERAL PUMP
A member of the Interpump Group
MW/S SERIES
Page 15
With the pneumatic adjustment valve:
The filter must be installed as close as possible to the pump, should allow easy inspection and have the following
characteristics:
1. Minimum capacity 3 times greater than the pump’s rated flow value.
2. Filter port diameters must not be smaller than the pump inlet ports.
3. Filtration degree ranging between 200 and 360 µm.
In order to guarantee correct pump operation, it is important to plan periodical cleaning of the filter
depending on actual pump usage, water quality and actual clogging conditions.
9.8 Outlet Line
To obtain a correct delivery line, please comply with the following installation instructions:
1. The internal diameter of the hose must allow to guarantee correct fluid speed; see digram in paragraph 9.9
2. The first section of the hose connected to the pump must be flexible in order to isolate pump vibrations
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 delivery line.
5. Use pressure switches 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.
Ref 300790 Rev.D
11-12