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Forward Curved Centrifugal Fans - Single inlet - standard motor

Design

Forward curved impeller fans with their motors out of the airstream are suitable for a wide range of general medium pressure and ducted applications. Whilst multi-vane impellers are for clean air, its temperature can be relatively high because the motor itself is situated in ambient conditions. The motors being of standard industrial type, their protection class is normally IP54 or IP55.

With no restriction on motor size, the fan performance can be high for given impeller dimensions.

Speed control is possible by variable frequency inverter drive, but not generally by voltage variation. The usual consequence of trying to vary the voltage is non-linear control, pressure dependent speed, and motor over-heating. Some models require a minimum system pressure/maximum flow rate to prevent motor overheating.

Application

General air extraction systems, air filtration, hot fume control, special effects equipment, inflatable equipment, boiler forced draught, environmental chambers, ultra-sonic equipment, printing and drying equipment, electronic enclosure ventilation.

Technical Specification

Specification Description
Speed Control

Frequency inverter

Pressure

Medium

Mounting

Scroll brackets, discharge flange, feet on larger sizes

Features

120°C standard; 250°C special. Materials handling version

Impellers

Forward-curved centrifugal

Protection

IP54/IP55 standard + specials

Supply

Single and three phase models

Motor Type

Standard, out of airstream

Size

Ø80 to 500 impeller

Flow Rate

16500m³/h range maximum

Pressure

3400 Pascals range maximum