Plus 42 - 45 - 50 - 55
3-2012
14
4.2 - FAN SERVO AMPLIFIER
Centrifugal fan
The front-engaging clutch assembled on the fan shaft allows the operation of the centrifugal pump
whitout the fan. (for versions on which it is foseen).
The fan housing can rotate 360 degrees. This permits the positioning of the outlet spout at the point
necessary for the assembling of the different distribution devices.
An air intake, pre-set on the outer edge of the housing, is connected to the plunger tap placed above
the tank. Through this tap it is possible to carry out or exclude pneumatic agitation. The closed blades’
impeller is sheet steel realized and dynamically balanced; the air intake opening on the casing is
protected by a steel grating.
Servo amplifier
It is equipped with an automatic tensioner of the
driving poly-V belts that keeps the belt tension
constant, avoiding slipping and wear. A free-
wheeling gear is included between the Power
Take-off of the servo amplifier and the fan control
pulley (for versions on which it is forseen). In
case of sudden decelerations or unexpected
engine stoppage, this allows the fan to continue
its free rotation, thus avoiding extreme mechan-
ical stresses to be transmitted to the drive mem-
bers.
POWER
TAKE-OFF
(PTO)
PUMP
DRIVE
TRAPEZOID
BELT
00014
AUTOMATIC
BELT
TIGHTENER
PUMP
LOWER
PULLEY
RELEASE
FREE
WHEEL
FAN
CONTROL
POLY-V BELT
00402
00014
00251
FAN
SWINGING
HOUSING
COLLAR
NUT
SHAKER
AIR INTAKE
PROTECTION
GRILL
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