6-2 Preventative Maintenance

Cleaning or Replacing the Process Air Filters

Regular filter cleaning will keep your dryer operating at peak efficiency. The process air filters protect the centrifugal blowers from plastic fines being drawn in from the drying hopper. Filters should be cleaned when airflow restriction trips the dirty filter alarm. Filters should be replaced at least once a year.

Caution! Operating the dryer without the process air filters installed will void the warranty.

On 600-1500 cfm dryers, there is a single high-temperature (up to 350ºF) filter mounted above the process blower on the rear of the dryer. On 2000-3000 cfm dryers, there are two high-temperature (up to 350ºF) filters located in the housing under the blower platform on the left rear corner of the dryer.

Vacuuming. Vacuum cleaning is the preferred method for cleaning the process air filters because compressed air or high-pressure washing can damage the filter. Vacuuming removes most large particles and surface contaminant. Use a commercial duty vacuum cleaner and vacuum the filter from the air intake (dirty) side only.

Compressed Air Cleaning. Blow clean, dry compressed air up and down the pleats, blowing out the filter from the clean side. Do not shoot the air in a criss-cross motion against the grain of the pleats—this won’t clean the filter, and it may damage it. Compressed air should be less than 100 psi—use a 1/8 diameter nozzle at least 2 inches away from the filter.

Figure 13: Process Filter Housing

 

Stainless Steel

 

High

 

Filter Housing

Temeprature

 

 

 

Gasket

 

High

 

 

High

Temperature

 

 

Temperature

Cartridge Filter

 

 

Cartridge Filter

 

Stainless Steel

 

Stainless Steel

 

Filter Housing

 

 

 

 

Filter Housing

 

 

 

Cover

Filter Housing

Filter Housing

 

 

Cover Latches

Cover Latches

 

High

 

 

 

Temeprature

 

High

 

Gasket

 

Temeprature

 

 

 

Gasket

Stainless Steel

 

 

 

Filter Housing

 

 

 

Cover

600-1500 cfm dryers

 

 

2000-3000 cfm dryers

Large Dehumidifying Dryers

Maintenance

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Sterling 882.00295.00 specifications Preventative Maintenance, Cleaning or Replacing the Process Air Filters

882.00295.00 specifications

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