5
6
3.4 Sizing
The sizing of the dirt separator strainer must be performed considering the following values:
Maximum recommended flow rate: 20 m
3
/h
Hydraulic characteristics
Kv
(m
3
/h)
45
Connections
2"
100
1000
50
200
500
2000
5000
1
0.5
10
2
3
5
G(m
3
/h)
100
20
30
50
1
10
0,5
2
5
20
50
Δ
p(mm w.g.)
Δ
p(kPa)
4 General description of the operation
The dirt separator strainer consists of a series of elements that make it possible to obtain a product capable of carrying out a constant and continuous
filtration of the system water and automatic cleaning.
The device is used only in central heating systems to remove dirt and impurities from the circuit progressively and completely.
The device must not be used by persons (including children) with impaired physical, sensory or mental capabilities, or lack of experience
and knowledge, unless they are instructed.
Any use of the device other than its intended use is prohibited.
4.1 Operating principle
This device flushes the system circuit medium by direct action through the direct action of passing through the specific filtering elements appropriately
arranged inside the body. The specific filtering mesh allows the removal of impurities that are deposited on the external surface of the strainers.
The very selective mesh filters particles with a diameter of 30 μm at the first passage and separates dirt particles up to 2 μm. At the same time, ferrous
particles are separated out by the magnets on the surface of the filter element.
Automatic cleaning of the filtering elements takes place mechanically by means of washing with pressurised mains water while the filtering elements
rotate.
In all its functional phases - operation, cleaning,filling and draining - the device is controlled by a special digital regulator, which can also be managed
remotely using a BMS system running MODBUS-RTU protocol.
This device operates according to different operating steps:
- filtration/ normal operation
- filtering elements cleaning
- circuit filling and operating conditions reset
The digital regulator manages the opening status of the inlet and load/drain valves, together with the strainers rotation motor during the cleaning. The
cleaning phase is automatically activated according to a preset pressure drop value or in a programmed way.
Depending on the type of system, the device can be combined with others for parallel operation.
