The GDB Galaxy In-line Belt Driven, Twin fan range represents the latest development from Vent-Axia in high performance, run and standby twin fan. Designed to be controlled inconjunction with Vent-Axia Trakmaster twin fan controller range, the total package offers the end user flexibility when interfaced with or without a (BMS) Building Management Systems, such as manual selection, 12/24hr auto changeover ensuring the extended life of the fan and motor, night setback during low levels of occupancy, for energy management control during 24hr extraction.

The unit casing is manufactured from Heavy Gauge Galvanised Steel fitted with inlet and outlet discharge spigots. Individual gravity return shutters are fitted as standard to prevent air recirculation through the standby or the system during shut down periods. Galaxy Duct Mounting Belt Driven Twin Fans are suitable for horizontal mounting only. Assembly controlled to BS EN ISO 9001.

To meet COSHH requirements, double pole service isolator switches are available. With access to the fan section via an easily removable access panel from the top of the unit, for cleaning and maintenance during shut down periods.

The Galaxy range is available in four models with extract performance ranging from 0.02m³/s up to 2.5m³/s (720m³/h to 9000m³/h), with pressure characteristics of up 400Pa.

Fan / Motor Assembly

Galaxy GDB belt driven fans are double inlet double width, forward curved centrifugal fans belt driven by totally enclosed fan ventilated, wound to suit 220-240V/1/50HZ or 380-415V/1/50Hz electrical supply. Protected to IP54, against dust and water jets complying with BS EN 60529.

Motor insulation Class F as a minimum, suitable for operating temperatures up to +40°C. Both the fans and motors are mounted on a steel frame, with anti-vibration mounts between the frame and casing and a flexible connection between the fan scroll and fan plate, minimising vibration. All belt driven Galaxy units are supplied with metric pulleys to ISO 4183 and wedge belts to ISO 4184 and DIN 7753.

Electrical

All Motors are available in either single phase 220-240V 50 Hz capacitor start and run or three phase 380V-415V 50Hz.

Sounds Levels
Fan sound levels are measured in a reverberant chamber in accordance with BS848 Part 2 1985. Published dB(A) figures are free field sound pressure levels at 3m with spherical propagation at a reference level of 2 x 10-5Pa (20 micro-Pascal). The inlet and outlet sound power level spectra figures are dB with a reference of 10-12 Watts (1 pico-watt). To ensure minimum noise levels during speed control, an auto transformer speed control is recommended.

Quality Assurance
Design and manufacture are in accordance with the standard for quality management system BS EN ISO 9001:1994.

Selection Procedure
Plot your specified duty on the relevant graphs. Select motor size and fan speed required. The full Stock Ref. for your unit will comprise of the unit size, motor rating, supply and fan speed.

Motor Sizes:
0.37 kW = C
0.55 kW = D
0.75 kW = E
1.10 kW = F
1.50 kW = G
2.20 kW = H
3.00 kW = J
4.00 kW = K