Sci-tech Radial Fan test Apparatus Model FM 082, experimental unit provides the basic experiments to get to know the operating behaviour and the most important characteristic variables of radial fans.
Radial fans are used to transport gases with non-excessive pressure differences. The medium is drawn in axially to the drive shaft of the radial fan and is deflected by 90° by the rotation of the rotor and discharged radially. FM 82 features a radial fan with variable speed via a frequency converter, an intake pipe and a delivery pipe. The transparent intake pipe is fitted with guide plates for flow guidance and with a flow straightener to calm the air. This enables precise measurements even with heavily reduced operation. The air flow is adjusted by a throttle valve at the end of the delivery pipe.
To demonstrate the effect of different blade shapes two rotors are included in the scope of delivery: one rotor with forward curved blades and one with backward curved blades. The rotors are easily interchangeable.
The experimental unit is fitted with sensors for pressure and temperature. The flow rate is determined via differential pressure measurement on the intake nozzle.
The microprocessor-based measuring technique is well protected in the housing. All the advantages of software supported experiments and evaluation are offered by the software and the microprocessor. The connection to a PC is made by USB.
The well-structured instructional material sets out the fundamentals and provides a step-by-step guide through the experiments.
 functioning and operating behaviour of a radial fan
 radial fan with 3-phase AC motor
 variable speed via frequency converter
 transparent intake and delivery pipes
 throttle valve to adjust the air flow in the delivery pipe
 interchangeable rotors: 1 rotor with forward curved blades and 1 rotor with backward curved blades
 determination of flow rate via intake nozzle
 display of differential pressure, flow rate, speed, electrical power consumption and hydraulic power output, temperature and efficiency
 microprocessor-based measuring technique
 Optional unit-specific software for data acquisition and operation via USB under Windows Vista or Windows 7
– inner diameter: 90mm
– length: 430mm
Radial Fan Test
– inner diameter: 100mm
– length: 530mm
– power consumption: 110W
– nominal speed: 2800min-1
– max. flow rate: 480m³/h
– max. differential pressure: 300Pa
Displayed / measuring ranges
– differential pressure: 0…1800Pa
– flow rate: 0…1000m³/h
– temperature: 0…100°C
– speed: 0…3300min-1
– electrical power consumption: 0…250W
– operating behaviour and characteristic variables of a radial fan
– recording the fan characteristic (differential
pressure as a function of the flow rate)
– effect of the rotor speed on the pressure
– effect of the rotor speed on the flow rate
– effect of different rotor shapes on the fan characteristic and efficiency
– determination of hydraulic power output and efficiencies
– Mains power supply: 220-240V, 1Ph, 50Hz