Great Lakes Air Compressed Air Dryer GEH-500

Warning: This procedure requires trained personnel with PPE!

If desiccant is contaminated, it must be dealt with based on the amount of oil contamination.

Is the coalescing pre-filter in good condition?

Maintaining the coalescing pre-filter can extend the life of the desiccant.

Upload a photo of the drained desiccant

Drained desiccant can be disposed of as a general landfill product.

Upload a photo of the fresh desiccant added

Fresh desiccant should be added through the desiccant fill port.

Warning: This maintenance check requires trained personnel with PPE!

Purge mufflers preventing high noise levels?

Muffler elements clogged due to desiccant fines?

If the purge tower shows backpressure during operation, replace the muffler element.

Desiccant dust accumulation cleared?

Sign off on the purge muffler maintenance

• The Pre & After-filter element should be replaced whenever the pressure drop becomes excessive.

• Differential pressure is the best method to gauge the need for element replacement. The recommended maximum element differential is 10 PSIG.

• The pressure at which you should change your elements should be determined by comparing the operational efficiency of your system (Cost of pressure drop vs. cost or the elements).

• Many facilities put filter replacement on an annual or bi-annual schedule based on system contaminant load.

• Frequent inspection of the control air filter is required so desiccant particulate does not restrict the control air required for pneumatic actuation of dryer valves.

• The control air filter is generally replaced when the particulate after-filter on the dryer is replaced.;

Warning: Always consult the factory prior to changing operating conditions.

DO NOT operate the dryer with the purge valve closed. The flow path is required in all modes for repressurization.

Is there an adequate supply of purge air for proper regeneration of desiccant and good dewpoint suppression?

Enter the system pressure during low-pressure periods.

Is the purge pressure set at a low-pressure period so during those low-pressure periods the purge flow is not starved?

Set the adjustable purge valve to the following values for equipment operating at standard conditions.

Sign off on the purge rate maintenance

• Purge mufflers prevent high noise levels from the cyclic depressurization of the desiccant towers.

• The desiccant fines generated from normal operation will cause the muffler elements to become clogged, which will restrict depressurization flow and cause insufficient depressurization prior to the.

• If the purge tower shows backpressure during operation replace the muffler element.

• The desiccant loading procedure can cause a large amount of desiccant dust to accumulate prior to equipment startup.

• Most of this accumulation is blown out the purge exhaust valve during the first hours of operation. The high volume of desiccant fines from startup limits the life of the initial purge muffler element.;