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Forward Curved Centrifugal Fans - Single inlet - external rotor motor

Design

External rotor motors are usually contained within the width of the fan housing, thus saving the space normally occupied by a standard motor. They are located in the air stream, so temperature is limited, and are generally of protection class IP44, so the air needs to be clean and dry to avoid motor contamination.

Low cost speed control is possible by supply voltage variation, either by electronic (triac) method or by transformer. As the scroll housings of single inlet fans are in fabricated steel it is possible to have detachable discharge flanges, which means that the fan can be mounted on its air inlet side.

Application

Air filtration, spray containment, fume control, inflatable products, low profile air handling units, attenuated fan boxes, solarium equipment, conveyor cooling, electronic enclosure ventilation

Technical Specification

Specification Description
Motor Type External rotor motor, in the airstream
Supply

Single and three phase models

Protection IP44
Impellers

Forward and backward curved models

Features

Space saving. Slim and standard scrolls. Low cost speed control

Mounting

Scroll brackets or feet, discharge flange, adapted inlet

Pressure Medium
Speed Control Voltage variation
Size

Ø108 to 560 impeller

Flow Rate

10000m³/h maximum

Pressure

1100 Pascals maximum