Fan Technical Information

CFW is an ISO 9001 quality management system certified company.
All products developed at CFW's manufacturing facilities are tested in accordance with ISO quality management system procedures.

Materials of Construction

A comprehensive range of materials, including mild steel, pre-galvanised sheet metal, stainless steels, and special high spec steels are offered with a wide range of protective finishes. Our sales engineers will assist you in compiling a suitable material and protection specification to suit your application.


CFW uses the finest-quality bearings, selected for a minimum life of more than 100 000 hours. To improve fan reliability, we apply broad factors of safety when sizing shafts and calculating bearing loads. Standard fans are fitted with plummer block bearings incorporating grease-lubricated, self-aligning ball or spherical roller bearing sets. Higher class fans are fitted with unitary housing bearings designed specially for purpose.

Power Transmission

Couplings and pulley drives are selected with high factors of safety to ensure reliability and prevent unscheduled maintenance shutdowns.

Testing and Standards

Performance curves are based on tests done in accordance with ISO5801 2007 in our Research and Development Laboratory. CFW is an ISO 9001 quality management system accredited company and manufactures to CE, ANSI, and NEMA standards on request.

Aerodynamic performance standards

ISO 5801 Industrial fans - Performance testing using standardised airways
ISO 5802 Industrial fans - Performance testing in situ

Safety standards

ISO 12499 Industrial fans - Mechanical safety of fans-guarding
EN 14461 Industrial fans - Safety requirements

Mechanical vibration level standards

ISO 14694 Industrial fans - Specification for balance quality and vibration levels
ISO 10816 Mechanical vibration - Evaluation of machine vibration by measurement of non-rotating parts
ISO 1940 Balance quality of rigid bodies
ISO 13348 Fans - Tolerances, methods of conversion and technical data presentation
ISO 12759   Fans - Efficiency classification for fans

Welding standards

ISO 3438 and ASME 9

Electric Motors

A selection of motor enclosures and windings with various degrees of protection against water or dust ingress, or suitable for hazardous or high temperature applications is outsourced and fitted to complete the package.
Along with fan system energy optimisation, fans are being fitted with high efficiency motors on request.
Please furnish our sales engineers with full details concerning your power supply, i.e. voltage, phase, frequency, etc. with your enquiry.

In order to optimise your fan system, please complete the Fan Enquiry Form and one of our engineers will select the best option for your application.


Quick Contact Form