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Gravimetric Batch Blenders w/Mitsubishi Control Chapter 3: Installation 33
3-4 Pneumatic Installation
The Slide Gate/Auger blending system uses plant-supplied compressed air to operate the
metering and dump valves on the blender.
CLEAN AND DRY air must be supplied to the blender. The air supply should be filtered
through a 5 micron air filter with a water separator. Oil should not
be used unless air dryers
are installed on the compressed air supply. In this situation, 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 or oily 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.
Figure 18: Customer-Supplied Components
5 MICRON
FILTER
DRY 60 psi COMPRESSED AIR
LUBRICATOR
PRES SUR E
REGULATOR
OS/OA BLENDER
CUSTOMER-SUPPLIED COMPRESSED AIR COMPONENTS
The manufacturer provides all pneumatic lines on the blender piped to a single ¼” NPT
standard pipe thread fitting. The Slide Gate/Auger blending system requires approximately 1
cfm (1.7 m³/hr) @ 60 psi (4.14 bar) maximum air pressure for proper operation.
The working pressure of the blender cylinders is not to exceed 60 psi (4.14 bar). This is
adjustable by the regulator supplied on the rear panel of the blender. It is important to prevent
fluctuation in the air pressure to the blender by not installing the unit on an airline. 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.
Caution! To prevent damage to the equipment, do not exceed 60 psi (4.14 bar) air
pressure.
Caution! Always disconnect the compressed air supply when working on any part of
the blender.
BLENDER