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8. Product introduction
8.1 Product description
Grundfos pumping stations are pre-fabricated pumping stations
for collection and pumping of wastewater.
The pit is made of PE-HD (polyethylene) and comes with outlet
pipes and valves fitted.
The pipes are made of PE or stainless steel depending on the
location of the pit and the pumped liquid, and thus the pump
selected.
Wastewater is led into the pit. When the liquid in the pit reaches
the maximum liquid level, the pump will start and pump the liquid
further on into the sewer system.
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Fig. 21 Example of pumping station
Pos.
Description
1
Pump
2
Chain
3
Guide rails
4
Float switch
5
Non-return valve
6
Isolating valve
7
Flange/coupling
8
Connection, 1/2" internal thread
9
Cover
8.2 Applications
Grundfos pumping stations are used for collection and pumping
of drainage water, grey wastewater and sewage. The pump type
depends on the pumped liquid.
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8.3 Pumped liquids
8.3.1 Liquid temperature
Maximum 40 °C. For higher temperatures, contact Grundfos.
Select the pump on the basis of knowledge of the
liquid temperature. See the installation and operating
instructions for the individual pumps.
8.3.2 Acids and alkalis
The pumping station is resistant to strong acids and alkalis as
well as solvents.
The pumps are supplied with the pump pit and normally capable
of withstanding pH values between 4 and 10. In case of doubt,
please contact Grundfos.
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8.3.3 Viscosity
Very thick wastewater must not be led into the pit. See also the
installation and operating instructions for the pump.
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8.3.4 Density
Maximum 1100 kg/m
8.4 Pumping station system (PS.S)
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This section applies only to pumping station systems consisting
of Grundfos-approved components mentioned on the nameplate
of PS.S.
The pumping station system contains all the elements making the
pumping station function as one unit, and can contain the
following five elements:
•
pit
•
pump
•
pump controller
•
level controller
•
accessories.
The pumping station system may not always have all five
elements. However, it will always have a pit and a pump, but the
pump controller or the level controller may be incorporated in the
pump, and/or accessories may be omitted.
8.4.1 CE approval of PS.S
PS.S is CE approved in accordance with these directives and
standards:
•
EN 2006/42/EC, EU Machinery Directive
•
EN/ISO 12100, Safety of machinery - General principles for
design - Risk assessment and risk reduction.
In order to ensure safe transport and to fulfil customer requests,
the PS.S elements can be assembled on site. But the CE
approval of PS.S is only valid if the following conditions have
been fulfilled:
•
PS.S has been assembled correctly in accordance with the
installation and operating instructions for PS.S and the pit,
pump and control systems.
•
PS.S contains the Grundfos specified elements stated on the
PS.S nameplate. The PS.S nameplate is fitted inside the pit.
8.5 Pumping station modular (PS.M)
PS.M is used instead of PS.S when the CE approval for the
complete system is not needed or some of the components in the
pumping station, e.g. the controllers, are not supplied by
Grundfos.
A risk assessment for the complete system must be performed by
the customer, if necessary.
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