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The spiral housing of the radial fan in left or right hand version is manufactured by moulding from PE or PEel (PP, PPel or PVC on request) as standard. Stainless steel screws are used for the joints. Air temperature -15 ˚C to +70 ˚C, ambient temperature up to +40 ˚C.
Running wheel
is radial, made by casting from PP (PPel or PVC on request).
Motor
2 or 4 pole single or three phase asynchronous motor, insulation class F, grease-filled ball bearings for life. Motor is located out of the air stream. Protection class IP55. Multi-speed design, explosion-proof or outdoor versions on request.
Clamping machine
is located on the motor.
Speed control
is done by changing the voltage or by a frequency converter. The motors are designed to cover the entire power field of the fan. If other than rated speeds are required, a frequency converter is used.
Mounting
is carried out on the painted motor stool supplied with the fan. Stainless steel stool on request.
Noise
The sound pressure level at a distance of 1.5 m in the free acoustic field is read on the Lp scale of the power diagram from the intersection of the speed curve and the line of highest efficiency. The sound power in the different octave bands for different speeds is given in the table below the diagram. The values are measured with a tolerance of ±3 dB.
Accessories
- VFVN frequency converter for 3f. motors
- VFTM, VFKB frequency converters
- anti-vibration kit
- ON/OFF switch
- condensate drain sleeve
- flexible coupling incl. inlet/outlet clamp
- motor canopy
- spiral housing tear protection
- wall mounting bracket
- motor stool NEREZ AISI304
Accessories suitable for acid resistant fans can be found here.
Instructions
Fans are suitable by design for long duct runs in a variety of process and air handling applications, chemical, petrochemical and laboratory applications. They are not suitable for the extraction of wood dust and grit, or other flammable or explosive mixtures. Fans should only be started after connection to the pipe route to avoid overloading the motor.
Caution
Casing and wheel material can be selected within the specified range to suit the needs of the particular project and should be specified in the fan specification.
