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Conveying System Mechanical Components Chapter 5: Maintenance 84 of 138
Maintaining Filter Chambers
SFC Filter Chambers
SFC filter chamber maintenance is much easier if you use vinyl flex hose for making the final
connection to the cover. See Figure 55 on page 118 for a complete parts list.
To check the filter element:
1. Unlatch the clamp that secures the cover assembly.
2. Lift off the cover and look for element fouling or wear:
• If the filter is worn, replace with P/N A0571262 (SFC-S), P/N
A0547008 (SFC225), or P/N A0547007 (SFC1000).
• If the filter is lightly soiled, remove the filter and clean with
compressed air. Blow it out from the inside.
3. To remove the filter:
a. Note the orientation of the components.
b. Unscrew the retaining cover.
4. Wipe down the gasket and filter retainer/SFC cover mating surfaces to ensure a good
seal.
5. Blow out the cartridge filter with compressed air. Blow from the inside out.
6. Re-install the filter and filter retainer. Do not over tighten the retainer. A snug fit is
required for a proper seal.
7. Secure the cover assembly with the clamp.
• Periodically inspect the flapper assembly gasket and disk for signs of
wear. A good vacuum seal is important for proper operation.
• Periodically inspect the flapper dump assembly for proper operation.
The flapper should swing freely.
Note: The counterbalance should be adjusted so the flapper remains open from
3
/16”
(4 mm) to
1
/4” (6 mm) when not under vacuum.
Inspecting ACA Series Filter Chamber Filter Bags
Schedule regular filter bag inspections to maintain the operational efficiency of the filter
chamber. Make sure that schedules coincide with materials that are being conveyed. Dusty
materials require more frequent filter bag examinations.
1. Turn off compressed air and disconnect the electrical power supply.
2. Remove the stretcher clamp just below the externally mounted solenoid valves.
Be careful to avoid damaging the gasket between tank sections.
3. Lift off the upper tank section with accumulator, blowpipes, and filter bag rack.
4. Inspect the filter bags for dust caking, dampness, or oil deposits.
Any or all of these symptoms are indications of moisture or condensed oil in the
compressed air supply.