The Company Airflow Developments Group of Companies AIRFLOW Developments Ltd. is a private British company established in 1955 from one man’s expertise in the fields of fan design and air flow measurement. The company was founded in, and is still based in, High Wycombe, England. Since its inception the company has blossomed into a thriving multi million pound international manufacturing and research group, with subsidiaries in Germany and the Czech Republic, supported by an extensive world wide distribution network. With the wealth of knowledge gained from over 50 years research, design and manufacturing...

Fan Types Single Inlet This range of fans has been developed to provide reasonable volumes of air against resistances to flow greater than can be achieved from small tube axial fans. Compact overall dimensions have been achieved using forward curved, centrifugal impellers and two-pole (typical 2800 rev/min) motors. The range has several fans covering flow rates from 2.8 litres/s (6ft3/min) to 130 litres/s (275ft3/min) and static pressures up to 500 Pa (2 in.w.g) for the largest unit. The models 21ATXL, 26BTCL and 26BTML are very small units particularly suitable where highly localised cooling...

Fan Types ACF Compact This range is a family of quiet, high performance centrifugal fans designed with ease of installation in mind using powerful, efficient and reliable external rotor motors. With a very compact, narrow profile they are ideal for integration into many applications requiring unobtrusive air movement with the minimum of system disruption. There are three fans in the range, from the ACF 120x62 with a free air flow of 80 litres/s. (170ft3/min) to the powerful ACF 160x62 capable of developing pressures up to 600 Pa (2.4 in.wg.) Installation is simple with the dynamically balanced...

Fan Types DUPLEX The duplex or twin scroll fan units are basically two fans driven from a common motor which has a double shaft. The purpose of this design is to provide air across a broad front, for example a water to air heat exchanger. They have an inherent advantage over the Crossflow (or tangential) fan in that the forward curved centrifugal impellers have a better pressure development characteristic. This is important when a fan of low profile is required because of restricted space, but high resistance must be overcome, for example, in electronic cabinets where high packaging density is...

Fan Types High temperature (HT) Range With many years experience in fans handling hot air (including pioneering work on domestic fan assisted ovens). A range of five fans suitable for air, and combustion products from natural gas burning appliances, up to 250ºC, incorporate proven features to help ensure long reliable product life. The fans employ an intermediate cooling arrangement between the main impeller and motor to keep the bearings and windings within their temperature limits. Capable of performances between 10 & 130 litres/s (20 & 275 ft3/min) 900 they are used in such applications as...