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 80oC,
∙ ambient temperature range from -20oC to +40oC,
∙ 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 -20oC and above +40oC.