Kaeser Blower Purge Desiccant Compressed Air Dryer KBD4300

WARNING! The pilot air filter housing is a pressure-containing device, depressurize before servicing.

Is the dryer isolated from air supply?

Is the dryer fully depressurized?

Upload a photo of the manual drain on the pilot air filter after venting remaining pressure

Upload a photo of the cleaned filter bowl

Upload a photo of the cleaned and lubricated o-ring at top of bowl

Is the reassembly done in reverse order?

NOTE: The use of the correct replacement desiccant is necessary for proper dryer operation. Never use hygroscopic salts of the type commonly used in “deliquescent ” type dryers.

1. Frequency Of Desiccant Replacement

• Desiccant should be replaced whenever the required dew point cannot be maintained while the dryer is being operated within its design conditions and there are no mechanical malfunctions.

NOTE: Desiccant life is determined by the quality of the inlet air. Proper filtering of the inlet air will extend the life of the desiccant. Typically desiccant life is 2 years.

2. Procedure for Desiccant Charge Replacement

a. Depressurize and de-energize the dryer.

b. Remove the fill and drain plugs or flanges (where applicable) from the desiccant tower and drain the spent desiccant. Place a container at the base of the vessel to collect the desiccant. If necessary tap the sides of the vessels with a rubber mallet to loosen desiccant.

NOTE: Use extreme care when inserting rods or other tools through the desiccant fill or drain ports to loosen packed desiccant. Internal flow diffusers at the ends of the desiccant beds can be damaged or punctured by sharp instruments. These diffusers are necessary to distribute the airflow and keep the desiccant beads within the tower. Desiccant beads in exhaust mufflers, afterfilters, or the piping connected to the desiccant towers may indicate a perforation of a diffuser.

c. Replace the drain plug using Teflon tape or another pipe thread sealant suitable for compressed air service. Reinstall drain port flange cover (where applicable) in each desiccant tower.

WARNING! The Dew Point Analyzer filter housing is a pressure-containing device, depressurize before servicing.

Dew Point Analyzer operating properly?

Is the Dew Point Analyzer filter housing depressurized?

Procedure for element replacement

Depressurize dryer by running dryer and allowing system pressure to purge to atmosphere

Vent remaining pressure to atmosphere through the manual drain on the pilot air filter

Remove the filter bowl by pushing up, turning counterclockwise and then pulling straight down