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The spiral housing of the radial fan in left or right version is made of 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 exhaust for sizes 45, 50, 56, 63 and 80 or with square exhaust for sizes 45 to 110, see dimension diagram. Air temperature -15 ˚C to +70 ˚C, ambient temperature up to +40 ˚C.
Impeller
is radial, made by casting from PP. Stainless steel version 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. The motor is located out of the air stream. Protection class IP55. Multi-speed design, explosion-proof or outdoor versions on request.
The terminal block
is located on the motor.
Speed control
is performed 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.
Noise
The sound pressure level at a distance of 1,5 m in the free sound field shall be read on the Lp scale of the power diagram from the intersection of the speed curve and the line of maximum 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.
Mounting
is done on the painted motor stool that is included with the fan. Stainless steel stool on request.
Accessories
- VFVN, VFTM, VFKB frequency converters (K 8.1)
- anti-vibration kit
- ON/OFF switch
- condensate drainage sleeve
- flexible coupling incl. inlet/outlet clamps
- motor canopy
- spiral casing tear protection
- motor stool NEREZ AISI304
Instructions
The design of the fans makes them suitable for long air ducts in various technological and air handling applications, in the chemical industry, petrochemical 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.
Note
Casing and wheel material may be selected within the specified range to suit the needs of the particular project and should be specified in the fan specification.
