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MVA 02 rev 5 - December 2017
3.6
Installation type D: Instructions for assembly, installation and connections
In case of type D installations, since both the fan intake and exit are connected to ducts, no guards need to
be installed on either the intake or exit of the fan.
CAUTION:
The system designer must assess the need to fit any necessary guards at the intake and exit
ends of the system.
For installation types B, C and D, it is advisable to insert an anti-vibration joint between the fan
and ducts so as to compensate for any misalignments that may be present, to prevent the
transmission of vibrations and to avoid structural stress.
The choice of a standard anti-vibration joint for applications that are not particularly difficult depends on two
fundamental factors:
dust content of the fluid moved
fluid temperature
Clean air
Type 2 joint
< 60°C without anti-wear strip
Type 3 joint
<180°C without anti-wear strip
Dusty air
Type 5 joint
< 60°C with anti-wear strip
Type 6 joint
<180°C anti-wear strip
Joints type 2, 3, 5 and 6 cannot be used on fans subject to the ATEX 2014/34/EC Directive.
CAUTION:
Anti-vibration joints are suitable for installation on a single-stage fan, and must not be
subjected to effects of fluid dynamics caused by other machines installed in the same fluid
movement system.
For special applications, such as for example the movement of fluids at a high temperature or that are
particularly corrosive, or to guarantee perfect sealing of the joint, special joints must be used.
In this case the user and/or system designer must contact the
FVI
Technical Office.
