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6.Operating problems
2021/11
6.
Operating problems
The attached table lists solutions to problems that may arise while operating the blender. It is assumed that the
blender has been properly installed and that is has been selected correctly for the specific application.
Contact INOXPA if technical assistance is required.
Motor overload
The pump flow or pressure is insufficient.
Incorrect powder intake
Irregular discharge flow rate / pressure.
Noise and vibrations.
The pump gets clogged.
Blender overheated.
Abnormal wear.
Leak through the mechanical seal.
PROBABLE CAUSES
SOLUTIONS
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Wrong direction of rotation.
Reverse the direction of rotation .
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Insufficient NPSH
Raise the suction tank.
Lower the pump.
Reduce the vapour pressure.
Widen the diameter of the suction pipe.
Shorten and simplify the suction line.
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Cavitation.
Increase the suction pressure.
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Discharge pressure too high
If necessary, reduce the pressure losses,
for example, by increasing the pipe
diameter.
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Flow rate too high
Reduce the flow by means of a
diaphragm.
Partially close the discharge valve.
Trim the impeller.
Decrease speed.
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Viscosity of the liquid too high.
Reduce the viscosity, for example, by
heating the liquid.
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Liquid temperature is too high
Decrease the temperature by cooling the
liquid.
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Mechanical seal worn or damaged.
Replace the seal.
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Inadequate O-rings for the liquid.
Install the correct O-rings after
consulting the supplier.
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The impeller scrapes
Lower the temperature.
Reduce the suction pressure.
Adjust the impeller/cover.
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Foreign matter in the liquid.
Install a filter in the suction pipe.
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Mechanical seal spring tension is too
low.
Adjust as indicated in this manual.
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Low powder intake
Check that the valve area and the
bottom of the hopper are not wet.
Increase the flow of the hopper.
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Liquid pours out of the hopper
Decrease the suction tank’s liquid
height.
In pressurized tanks, lower the
pressure inside the tank.
