Hoval A 60 - Casing

9
3.2 Casing
There are different casing designs, depending on the wheel
diameter and whether the wheel is 1-piece or segmented.
Sheet-metal casing
Self-supporting aluzinc sheet steel casing are standard for
1-piece wheels with diameters up to 2620 mm. The sheet-
metal casing is strengthened with galvanised steel proles
from wheel diameters of 1800 mm.
Prole casing
A prole design of aluminium is used for wheels above
1500 mm diameter. The casing is extremely stable and the
dimensions are exible. The plate covers can be removed
and replaced quickly and easily, a factor which is important
for installation of segmented wheels.
The height and width of the prole casing is limited to 4.2 m.
Larger casings (welded construction, galvanised) are avail-
able customised for specic systems.
The casings are designed for installation in a ventilation unit.
Therefore, the sides are open; this allows inspection and
maintenance as required.
Wheel diameter (in mm)
Wheel 1-piece
Sheet-metal casing
(Delivery assembled)
Wheel 4-piece
Prole casing
(Delivery in parts)
Wheel 8-piece
Prole casing
(Delivery in parts)
Required torque
500 Nm
400 Nm
300 Nm
200 Nm
100 Nm
0 Nm
Table 1: Overview of designs and wheel dimensions (for standard casing)
600
1500 2500 2620 3800 5000
Casing types
Different types of casing are also available for adaptation to
different installation situations (see also Section 4 'Options'):
■ Special size:
Height and width of the casing can be selected as
required (for example for adjustment to the internal
cross-section of a ventilation unit). The hub can also be
placed away from centre.
Notice
The casing design may be different for special
sizes compared to Table 1.
■ Duct design:
The side walls of the casing are closed (for the duct
connection).
Structure