Product Introduction; Product Description Of Pressure Zone - Grundfos iGRID Montage- Und Betriebsanleitung

2. Product introduction

2.1 Product description of Pressure Zone

Grundfos iGRID Pressure Zone is a prefabricated pumping station
for incorporation in a new or existing district heating network where
pressure boosting of the circulated district heating water is desired.
The solution is constructed from PE (polyethylene) and is
delivered with the following pre-assembled components as
standard:
• inlet and outlet pipes
• isolating valves
• non-return valves
• pump or pumps including control unit
• pressure sensor
• connection points for sensors.
The inlet and outlet pipes for district heating connections are made
of steel lined with PU foam insulation and an outer sheath of PE
material welded to the pit wall at the pipe passage.
The pipe connections to the pump or pumps inside the pumping
station are assembled with flanges, bolts and gaskets inside
the solution.
The exterior pipe connections are welded to the buried
district heading pipes in the district heating network.
The solution has one or more pumps of the CRE or TPE type for
pressure boosting.
The solution provides the possibility of incorporating a flow sensor
including a number of pressure and temperature sensors as
needed.
The solution is fitted with non-return and drain valves to empty the
pipes of district heating water in the pit during service and
maintenance.
The solution is delivered with either a heavy-load top cover or a
standard top cover according to the requirements of the customer
depending on the intended location of the pit.
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Example of the iGRID Pressure and Temperature
Zone pit solution
Pos. Description
1 Pit
2 Ladder
3 Pump 1
4 Pump 2
5 Drainage pump
6 Drainage pipe
7 Drain pit
8 District heating flow pipe
9 District heating return pipe
2.1.1 Application of Pressure Zone
The Grundfos iGRID Pressure Zone prefabricated pumping station
is used for pressure boosting in the district heating network. Two
setups are possible:
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Pos. Description
10 Isolating valve
11 Base plate
12 Measuring stub for pressure measurement
13 Non-return valve
The typical setup with the district heating supply flow pipe
connected to the pump or pumps and with the district heating
return pipe run through the solution to install a flow, temperature
or pressure sensor.
The reverse setup with the pump or pumps positioned in the
district heating return pipe and with the district heating supply
flow pipe run through the solution to install a flow, temperature
or pressure sensor.
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