Starting-Up The Product; Product Introduction; Applications - Grundfos SRG Serie Instrucciones De Instalación Y Funcionamiento

5. Starting-up the product

Check the oil level in the gearbox before starting up
the pump. The oil must fill up between 50 and 75 %
of the gearbox.
Warning
When loosening the oil level screw, note
that pressure may have built up in the
chamber.
Do not remove the screw until the pressure
has been fully relieved.
If required, fill oil into the gearbox through the oil
filling hole (pos. 2 in fig. 16). For oil quality and
quantity, see section 7.3
If the pump has been in stock for a period before
startup, see section 7.2 Service
Fig. 16 Oil check and oil filling
Checks before startup
1. Check that the impeller is rotating in the correct
direction. See section
2. Make sure that the pump is completely
submerged in the liquid.
The pump must always be submerged
Caution
during operation.
3. Make sure that there are no solid objects in the
tank.
Warning
Make sure that no persons can fall into the
tank.
Oil.
chart.
2
1 3
4.4.3 Direction of rotation.

6. Product introduction

Grundfos recirculation pumps, type SRG, are
designed for transfer of liquids of low to medium
viscosity from one tank to another.
4
22 8
Fig. 17 SRG pump
Pos. Description
4 Pump rack
7 Motor
8 Gearbox
10 Impeller
22 Hydraulic inlet

6.1 Applications

Grundfos SRG recirculation pumps are used for the
pumping of return sludge in sewage treatment plants
and for other pump applications involving a high flow
rate and low head. The pumps are designed for
continuous operation (S1).
In order not to overload the pumps and expose them
to corrosion, the following limitations must be
observed.
Liquid temperature
pH value
Maximum dry solids content
Maximum dynamic viscosity
Maximum density
Chloride content
7 10
5-40 °C
4-10
1.5 %
500 mPas
3
1060 kg/m
≤ 200 mg/l
(stainless steel
1.4301)
15