Applications; Combustion Engine; Pumped Liquids; Technical Data - Grundfos POMONA Series Installation And Operating Instructions Manual

5. Applications

POMONA pumps are designed for applications such as:
• dewatering of construction sites
• draining of stormwater
• groundwater level control
• irrigation of gardens and parks
• water supply in agriculture and horticulture
• well-tube injection
• emergency pumping - flooded areas, fire etc.
• draining of yachts and motor boats.
The pumps are suitable for both temporary and permanent
installation.
Warning
The usage of pumps with electric motors for
swimming pools and garden ponds and in the area of
such items is only permitted if the installation is
carried out in accordance with local regulations.

5.1 Combustion engine

Warning
Observe the manufacturer's instructions for petrol
and diesel engines. Information on the direction of
rotation is of particular importance. The pump rotates
clockwise when viewed from the drive shaft.
Information on air supply and the extraction of
exhaust gases is of particular importance when
installed in a closed room.
If the tank is to be emptied, drain the fuel into a
suitable container.

6. Pumped liquids

The pumped liquid must not attack the pump materials
chemically.
pH value: 4-10.
POMONA pumps are wear-resistant and not sensitive to
contamination from mud, dirt or sand.
The pump is not suitable for continuous pumping of
Caution
abrasive materials such as river sand.
Solid matter up to the following particle sizes can be pumped in
the liquid without any danger of a blockage:
Type
POMONA PO07
POMONA PO23
POMONA PO32
POMONA PO42
If the pump is used for pumping liquid fertilisers,
pesticides, milk of lime or wood preservatives (free
from animal fat and carbolineum), the pump must be
thoroughly cleaned after use or at least once a day.
Caution
It is not permitted to pump flammable fluids, with the
exception of EL heating oils.
When pumping heating oils, the pump must be
placed in an oil-tight pan or similar to provide
protection against environmental pollution.
6
Max. particle size
[mm]
3
10
20
30

7. Technical data

For performance curves, see page 96.
Description
Maximum liquid
60 °C
temperature
Maximum ambient
temperature
-1
Minimum speed [min ]
-1
Maximum speed [min ] 7500
Sound pressure level [dB(A)]
Electric motor
< 70
-1
2900 min
Combustion engine
Vacuummetric suction lift
Up to 5
[m]
Shaft seal
Shaft seal
Materials
Housing, housing
cover
Bearing bracket
Wear plate
Screw plug
Impeller EN-GJL-200 (GG20) or G-CuSn
Connections
Suction and
G 3/4
discharge
(DN 20)
connections
Weight with electric motor [kg]
Bare shaft pump
Base frame 13.5
Carrying frame
Weight with combustion engine [kg]
Carrying frame
Base frame
On trolly

7.1 Inlet pressure/priming

POMONA pumps are self-priming and, once filled, continually
ready for use.

7.2 Maximum pressure

The maximum pressure (inlet pressure and pump pressure
against a closed valve) is 6 bar.

7.3 Minimum flow rate

The pump must not run against a closed discharge valve, as this
will cause an increase in temperature/formation of steam in the
pump. This may cause shaft damage, impeller erosion, short life
of bearings, stuffing boxes with packing rings or mechanical seals
due to stress or vibration.
The minimum flow rate must be at least 10 % of the maximum
flow rate stated on the pump nameplate.
80 °C
40 °C
2500
4500 3700 3000
82 90 90
- 91 102 105
Up to 8
NBR
EN-GJL-200 (GG20)
EN-GJL-200 (GG20)
EN-GJL-200 (GG20)
Stainless steel
G 2 G 3 G 4
(DN 50) (DN 80) (DN 100)
9 30 40 71
46 80 220
- 48 - -
- 48 90.5 -
- - - 237
- - 103 280