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thermoplastics using a deep draw process; those of the MLT series are made employing a press
process and then welded. Possible housing settings are named per VDMA 24165.
The radial fan housings in the ML / MLF/ MLT 75/110 series must be equipped with safety grilles on
both the pressure and suction sides. If same are not included in the scope of delivery then they must be
installed by the operator.
The rotors in the ML and MLF 75/110 series are made of thermoplastics using the injection moulding
process; those in the MLT series of 1.4301 stainless steel with a higher number of blades.
The fans in the ML/ MLF/ MLT75 and 110 series do not have shaft bushing as standard.
Data on radial fans supplied including drive motor/s is contained in Appendix A6.
7.2
Fan materials
The permissible total temperatures of the thermoplastics used are as below.
Plastic
Temperature range
min. / max.
Plastic
Temperature range
min. / max.
PVC
0 °C to +50 °C
PE
-20 °C to +60 °C
PP/ PPS
-20 °C to +70 °C
PVDF
-10 °C to +100 °C
Table 3: Temperature range of the plastics used
The total temperatures the plastics used can stand may not be exceeded or undercut. At temperatures
below zero the risk of fracture increases if mechanically loaded.
The maximum ambient temperature for drive motors is 40 °C.
7.3
Proper use
The fans in series ML-, MLF- and MLT- 75/ - 110 are intended for use in pumping gaseous
media free of dust.
Radial fans of the series ML-/ MLF-I/ MLT-75 and -110 are solely intended for use in piping systems.
Before using them it must first be determined that the entire plant concerned complies with EU
Machinery Directive RL2006/42/EU.
