SDB Silent Box
Advantages
- The top cover and the panel on the inlet side can be exchanged in order to allow either horizontal in-line airflow or a 90° deflection
- Casing made of galvanised sheet steel
- Mineral wool insulation
- Low noise levels
- Easily connected to DIN-standard tubes
- Forward curved impellers allow higher higher pressures
- Screwed panels allow easy access to the fan
Casing
The SDB frame construction is made of aluminium profiles connected by corners made of glass-fibre reinforced polyamide. The panels are made of galvanised sheet steel, insulated with sound absorbing mineral wool.
Motorized Impellers
SDB fans of sizes 125-315M are fitted with 4 step motors. This allows speed adjustment by means of a simple step switch. Please note that these motors have to mounted with the motor shaft in a horizontal position.
SDB fans of sizes 315L - 400 are driven by a speed-controllable external rotor motor of protection class IP 44 according to DIN 40 050, insulation class B. Motor protection is ensured by thermal contacts inserted into the motor winding.
The forward-curved impellers of size 125 and 160M are made of polypropylen according to IEC 695 T2-2 and EN 60 335-2-31. All other impellers are made of made of galvanised sheet steel. The impeller is fixed directly onto the external rotor motor, the motorised impeller unit is dynamically balanced in two plains according to VDI 2060, quality class Q 2,5. The ball bearings are maintenance free.
