- Speed-controllable
- Integral thermal contacts
- Low sound level
- Maintenance-free and reliable
The DHS models have impellers with backward curved
blades and external rotor motors. All motors are speed controllable
over the voltage. Frequency inverters must have an allpole sine filter.
To protect the motors from overheating the DHS
up to size 311 have integral thermal contacts, from size 355
with external leads for connection to a motor protection device.
The casing is made from aluminum and the base frame is made
of galvanised steel, powder-coated. Suitable for coastal applications.
The impellers up to size 355 are manufactured from polyamide
PA6 25GV, from size 400 in Aluminium.
