Correct Use For The Intended Application And Field Of Application - HLU HF R 48 R Series Operating Manual

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Centrifugal fans consist of the following main assemblies: Frame, housing, impeller and
drive motor. They are delivered with direct drive (impeller on motor shaft) (except for the type
HF R ...-48 R), as well as with belt drive (transmission motor-belt-impeller shaft).
The housings of the series HF R ...-15 / 17 D R are sintered with polyethylene (PEs. RAL7036)
as standard. The housings of the other series are manufactured in self-supporting welded cons-
truction with different thermoplastics adapted to the particular conditions of use. They have a
housing cap on the inlet side, which allows the mounting / dismounting of the impeller after
demounting. For the production series RV 45 and RV 63 optionally also moulded casings made
from PVC and PPs are used. These consist of two shells in which the impellers are laid before
welding. Demounting of the impellers is not possible.
The housing is performed with a splinter protection, has on its deepest point (lateral) condensa-
te drain drillings and it can be delivered with revision opening if requested.
The impeller is statically and dynamically balanced (min. quality class G 6.3 acc. to DIN ISO
21940-11). The vibration limits correspond to the ISO 14964 standard. Depending on the speed
and other procedural parameters, various special materials are used as impeller materials in
addition to thermoplastic. Main differentiating factor of these series are the different bladings of
the impellers and the housing construction.
On the type label are registered the maximum impeller r.p.m.s. For increasing the impeller
r.p.m., previous consultation of the manufacturer is indispensable.
For fans which are appropriated for the use in Ex-zone 1 the housing and the impeller are made
of electrical conductive thermoplastics. The standard thermoplastic plastic fan is not equipped
with shaft sealing.
The HF R ...- 13 D / R DS2 / DS3 series has a Kera seal as standard grown.
The exhaust fluid is aspirated axially by the rotating impeller and transported radially to the
outlet in the helicoidal housing. The applied energy is converted into mass flow and pressure
increase of the exhaust fluid in the impeller.

2.2 Correct use for the intended application and field of application

The fans are suitable for exhausting aggressive, dust-free, low-aerosol gases and clean air.
Explosive atmosphere can be exhausted only using fans designed specially for this application.
The permissible gas temperatures for the most frequently used plastics materials are generally
with PVC: 0 °C bis 50 °C,
with PE, PE-FR (PEs) -20 °C to 60 °C,
with PP, PP-FR (PPs): 0 °C to 70 °C,
and with PVDF: -10 °C to 100 °C.
These temperatures must not be exceeded.
Depending on gas composition and impeller speed, these temperature ranges must be check
and restricted, if necessary. With particularly aggressive media, the reductions must be checked
and determined individually in each case. The max. ambient temperature is 40 °C.
Sufficient cooling can be ensured regardless of the volume flow, in accordance with the
above-mentioned conditions.
The fan was developed, designed and built exclusively for industrial and commercial use. Using
the fan for domestic purposes is excluded.
06.2019
Operating manual
Centrifugal fans
HF R | RV | MRV
www.hlu.eu