DOUBLE INLET (LOW NOISE) CENTRIFUGAL FANS RANGE Ds
GENERAL TECHNICAL DATA
The Double inlet centrifugal fans are made of galvanized sheet steel.
The aerodynamic schema permit highest volumetric capacity for given size, highest manometric effectiveness and low noise levels. This fans are provided for belt-drive tranmission with steel/aluminium pulleys.
The impellers and the pulleys are statically and dynamically balanced.
The normal production is designed for 220/380 V ± 5% and frequency 50 Hz, class “B”, level of protection IP44 or IP54 - according DIN IEC 34, part 5, flangemounted construction - according DIN IEC 34, part 7.
The range Ds is proposed:
Kram reserves the right to make any dimensional design changes in accordance with their improvement program.
DIMENSIONS OF FAN ASSEMBLE
The fans are tested in accordance with ISO 5801 “Industrial fans – Performance testing using standardized airways”
The functional characteriistics for range Ds.A1 are graphically showed. The indicate noise level is in dB(A) at distance of 1,5 m behind the inlet flange, in free field.
The various types and typedimensions of double inlet centrifugal fans bear the following marking: Class, Composition, Nominal diameter and Art of impeller.