■ Types
□ HELIOS offer a wide range of
products and therefore are able
to supply fans for almost any
application.
□ High efficiency axial fans are
available in over 20 standard
sizes and include more than
1000 different models; many
of which are shewn in this
catalogue.
□ Closely' matched air flow volume
and pressure can be achived on
larger fans with a maximum
diameter of 7100 mm through
adjustable pitch angle. Four
standard casing types are avai-
lable.
■ Models
Shown in this catalogue
1. Wall fan HQ - square plate
axial fan with inlet cone
Casing made from galvanised
steel. Motor with terminal box
and motor side guard.
2. Wall fan
HW, AVD DK - circular plate
axial with inlet cone
Casing made from galvanised
steel. Motor with terminal box
and motor side guard.
3. In wall fan HS
Cylindrical duct case with
spigot ends
For flush, wall or in-line duct
installation. Casing made from
galvanised steel with circular
stiffening rings.
4. Cased axials
HRF, AVD RK
Cylindrical duct with flanges
on both ends
For direct in-line installation in
ducting. Flanges made to DIN
24155. PT. 3. Casing made
from galvanised steel, additional
terminal box (IP 55) on outer
casing.
■ Motor form
□ Depending on the motor
specification e.g. protection
class, power, fan diameter and
installation - motors of the forms
B 0. B 5. B 14 or V... are used.
■ Impeller
□ Depending on the performance
requirements the impellers are
made from various materials;
see product pages. The
standard design is made from
reinforced polymers. Other
materials, aluminium or steel,
are available on special order.
□ All impellers feature:
- Lew noise characteristics.
- High efficiency.