Compatible Accessories
Overview
The Sigma Series of forward-curved centrifugal fans is ideal for handling relatively low airflows at quite high pressures.
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Features and Benefits
Designs
The Sigma Series feature a single width, single inlet housing design. The units can be used for applications where medium airflows are required but system pressures are relatively high. The units can be mounted at any angle.
Protection
Auto-reset type fitted as standard
Testing
All units are tested to NFX 10-200 (airside performance).
Specification
Construction
The Sigma Series have housings manufactured from pressed, galvanised steel.
Impellers
High performance impellers are made from galvanised steel and feature a forward-curved design.
Motor
The fans are built with external rotor, squirrel cage induction motors with sealed for life ball bearings. The motor requires an electricity supply of 230V, single-phase, 50/60Hz. It is rated to IP44.
Control
The motors are speed-controllable.
