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Gravimetric Batch Blenders w/Mitsubishi Control Chapter 5: Maintenance 70
Pneumatic System Maintenance
The Slide Gate/Auger blending system uses plant-supplied compressed air to operate the
metering and dump valves on the blender.
It is the user’s responsibility to provide CLEAN AND DRY air for the blender to be
connected to. The air supply should be filtered through a 5 micron air filter and have a water
separator installed. Oil should not be used unless air dryers are installed on the compressed
air supply. In this case, an oiler may be required on the blender to keep the air cylinder seals
lubricated.
Note: As this blender uses air for blender metering functions, it is very important to
supply clean, dry air to the blender. Dirty air can affect blender accuracy,
result in poor performance and cause injury. Provide a 5-micron air filter on
the air supply to the blender and be sure excess oil is removed.
If a dirty air filter is noticed during regular inspection intervals, replace with a new 5-micron
air filter. Check the compressed air supply and ensure that the necessary steps have been
taken to remove any oil from the process.
5 MICRON
FILTER
DRY 60 psi COMPRESSED AIR
LUBRICATOR
PRES SUR E
REGULATOR
OS/OA BLENDER
CUSTOMER-SUPPLIED COMPRESSED AIR COMPONENTS
The working pressure of the blender cylinders is 60 psi. This is adjustable by the regulator
supplied on the rear panel of the blender. (It is important that the air pressure to the blender is
not fluctuating by installing the unit on an air line with other equipment using large volumes
of air. If this is the case, an accumulator tank with a check valve may have to be provided by
the customer to ensure the blender a steady air supply.)
WARNING! Always disconnect the compressed air supply when working on any part of
the blender.
BLENDER