Karcher IV 100 - 55 M B1 - Manual (Page 6)

6 English 5.906-587.0 Rev. 00 (05/14)
– Clarify with the customer in detail which requirements
the stationary system should fulfil.
The questionnaire for central vacuuming systems
5.906-589.0 helps, see Chapter "Annex 1 - Question-
naire central vacuuming systems 5.906-589.0“.
– The system design is based on the number of suction
stations to be operated in parallel and the amount of
material to be transported per vacuuming point.
Flow rate with an air speed of 20 m/s:
Air is the transport medium for the vacuumed material. To
ensure that the vacuumed material is transported in the
entire pipeline network without depositing (material depos-
it) and clogging, a steady air speed must be present in the
network.
The required air speed varies for different vacuumed ma-
terials.
On its way through the line network the individual particle
of the vacuumed material does not fly straight from the
suction station to the disposal container. Thus, it always
requires more time from the vacuuming point to the dispos-
al container than the air speed gives you reason to expect.
For this reason, an after-running time of the vacuum clean-
er must always be provided for to prevent depositing due
to early switch-off.
Note
The perfect and thus targeted conveyance in the pipeline
is the flying transport.
Flying transport
Clogging transport
The smaller values can only be used with lines that are de-
signed in a way that is favourable for the flow, e.g. with
short or vertical lines, elbows with a large radius, fork piec-
es with a small angle.
Area wood
Area metal
Area food
7 Prerequisite system planning
Suction hose Volume flow (flow rates/h)
DN 42 approx. 90 m³/h
DN 51/52 approx. 140 m³/h
DN 61 approx. 200 m³/h
DN 71/72 approx. 270 m³/h
8 Basics of the system planning
8.1 Air speed
Vacuumed ma-
terial Dimensions Air speed
Wood chips 50x20x1 mm 22-25 m/s
Sawdust (wood) Ø 0.7 mm 20-25 m/s
Steel balls Ø 1 mm 25-35 m/s
Active carbon Ø 3 mm 20-23 m/s
Plastic granules Ø 3.5 mm 20-23 m/s
Plastic powder Ø 0.2 mm 20-25 m/s
Vacuumed material Air speed
Wood chips with pieces 25-30 m/s
Sawdust damp 22-24 m/s
Coarse wood chips without pieces 18-22 m/s
Wood wool 18-20 m/s
Small wood and planing pieces 16-18 m/s
Finest wood dust 12-14 m/s
Vacuumed material Air speed
Very coarse metal dust and
chips 20-25 m/s
Coarse metal dust and chips 20-22 m/s
Metal dust, chips 18-20 m/s
Fine metal dust 16-18 m/s
Metal smokes (welding) 14-16 m/s
Finest metal dust 12-14 m/s
Vacuumed material Air speed
Tobacco dusts 15-16 m/s
Grain and feeding stuff dusts 14-16 m/s
Flour 12-14 m/s