Centrifugal fan GFB

APPLICATION
Fan designed for transporting non-aggressive and non-explosive gases without contomination. Typical applications:
   ∙ various mechanical ventilation installations,
   ∙ air pumping in production processes,
   ∙ cooling, drying systems,
   ∙ refrigeration and air-conditioning equipment,
   ∙ air handling units.
CONSTRUCTION
   ∙ low-pressure centrifugal fan with direct drive,
   ∙ the impeller is welded from galvanized steel sheet with forward curved
   blades, dynamically balanced according to ISO 1940-1, (stainless steel
   sheet 1.4301 for size 97),
   ∙ the housing is made of welded sheet steel,
   ∙ protective mesh at the inlet,
   ∙ motor stand in 250-400 models and in the 4/225 model,
   ∙ fan painted blue RAL 5010 (corrosivity category C3),
   ∙ maximum temperature of the transported medium is 80°C,
   ∙ ambient temperature range from -20°C to +40°C,
   ∙ figure LG90 in 4/250, 4/315 and 6/315 models,
   ∙ figure LG270 in other models.
MOTOR
   ∙ asynchronous single-phase 230V 50Hz (power to 1,1kW),
   ∙ asynchronous, three-phase 230V/400V 50Hz (power to 3kW)
   ∙ asynchronous, three-phase 400V/690V 50Hz (power from 5,5kW),
   ∙ efficiency class IE3 (power from 0,25kW), or IE1 (power to 0,25kW),
   ∙ degree of protection IP55,
   ∙ insulation class F,
   ∙ three-phase motors are adapted for frequency converter.
SPECIAL EXECUTIONS
   ∙ optional configuration LG/RD,
   ∙ color other than standard,
   ∙ painting in higher category of corrosivity,
   ∙ housing and support made of galvanized steel sheet,
   ∙ housing and support made of stainless steel 1.4301,
   ∙ housing and support made of acid-proof steel 1.4404, 
   ∙ motor with voltage and frequency of power different than standard,
   ∙ motor with other than standard degree of protection,
   ∙ motor equipped with sensors or additional cooling,
   ∙ sealing between the housing and the motor,
   ∙ ambient temperature range below -20°C and above +40°C.