DA fans are low pressure centrifugal
fans, with double inlet and equipped
with a forward curved blade.
The range comprises 15 different sizes
available in several versions.
DA fans have forward curved centrifugal
impellers, tablocked on both sides to
two steel rings and to a double disk at
The blade is designed to minimize the
loss caused by air turbulence and to
obtain maximum efficiency with
minimum sound level.
All impellers are dynamically balanced.
The housings, in galvanized steel, are
formed by two side plates spot-welded
to a central scroll.
A cut-off mounted on
to the discharge prevents turbulence.
The side plates have an aerodynamic
profile and include some drill holes to
allow fixing of the base supports as well
as the motor support.
can be selected for the base support
and eight for the motor support.
The ball bearings are mounted on
rubber inserts to reduce vubration
except for the framed versions which
are filled with cast ball bearing
Operating temperature -30°C to + 85°C.
The “R” series fans are based on
standard “N” fans equipped with rectangular
side structures built with “L”
profiles which reinforce the unit, forming
a rigid cube structure.
This frame is
welded to the sides of the fan.
A number of groove-shaped drills on the
strenghthening frame corners allow for
a proper fixation.
The DAP Series of belt-drive fan-deck
assemblies are available with either a
fan scroll or separate base frame mounted
motor configurations. All models
include forward curved centrifugal fan
impellers, with electro-welded double
disc hubs supported on both sides by
high quality ball bearing assemblies.
All impellers have been specifically
designed and matched to maximise airflow
efficiency and minimise generated
All impellers are balanced both statically
and dynamically before complete DAP
The fan scrolls encasing the centrifugal
impellers are manufactured from high
grade galvanised sheet steel.
scrolls consist of two pressed side inlet
parts with an electro-welded rolled shell.
All scrolls have been designed to minimise
turbulence at the outlet by including
a specially formed cut-off.
pressed casing sides also include
strengthening ribs, and mounting hole
positions for both motor and support
These holes enable both the motor
and support feet to be mounted in one
of four positions as required.
All ball bearings are mounted on rubber
inserts to reduce vibration (except for
DAP-RC models which are supplied with
die cast bearing housings).
The DAP-RC series are manufactured
with an “L” shape profiled galvanised
steel support frame.
This support frame
is welded to the sides of the fan scroll to
reinforce the unit forming a rigid cube
In addition the frame includes
a number of elongated fixing point holes
to facilitate a multitude of installation