Great Lakes Air Compressed Air Dryer GEH-4000

Warning: This maintenance check requires trained personnel with PPE!

Purge mufflers preventing high noise levels?

Muffler elements clogged due to desiccant fines?

If muffler elements are clogged, replace them.

Purge tower showing backpressure during operation?

If purge tower shows backpressure, replace the muffler element.

Desiccant dust accumulation prior to equipment startup?

If there is desiccant dust accumulation, clean it.

High volume of desiccant fines from startup?

Warning: This maintenance check requires trained personnel with PPE!

Purge mufflers preventing high noise levels?

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

Desiccant dust accumulation prior to equipment startup?

Most of this accumulation is blown out the purge exhaust valve during the first hours of operation.

High volume of desiccant fines from startup?

The high volume of desiccant fines from startup limits the life of the initial purge muffler element.

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: 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.

Is the desiccant drained through the desiccant drain port?

Spent desiccant is not hazardous and can be disposed of as a general landfill product.

Is fresh desiccant added through the desiccant fill port?

The desiccant fill port is where the pressure safety relief valves are located.

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

Adequate supply of purge air present

System pressure during low-pressure period

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

Sign off on the purge rate maintenance