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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. The enclosures are available in two versions. With circular discharge for sizes 45, 50, 56, 63 and 80 or with square discharge for sizes 45 to 110, see dimension diagram. Air temperature -15 ˚C to +70 ˚C, ambient temperature up to +40 ˚C.
Running wheel
It is radial, made by casting from PP. Stainless steel version and with surface coating (laminate, hard rubber) on request.
Motor
2, 4 or 6 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 version, explosion-proof or outdoor version on request.
Clamping machine
is located on the motor.
Speed control
is performed by changing the voltage or frequency converters.
Mounting
is carried out on the painted motor stool, which is included in the fan delivery. 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, VFTM, VFKB frequency converters
- anti-vibration kit
- ON/OFF switch
- condensate drainage sleeve
- flexible coupling incl. inlet/outlet clamps
- motor canopy
- spiral casing tear protection
- NEREZ AISI304 motor stool
Instructions
The fans are suitable by their design for long air ducts in various process and air handling applications, in the chemical industry, petrochemistry and laboratories. 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.
