Circulation Heaters Remove Moisture From Bottles Before Filling

chromalox Steam, Air & Gas Applications gchi 02

The Challenge
Bottles are used for packaging a headache remedy which requires absolute absence of moisture. When the factory-sterilized bottles are brought from storage in sealed cartons, they are sometimes cool and moist. The challenge was to remove all the moisture and slightly pre-heat the bottles. It was also desirable to put the whole drying process on a production line basis. Four batch-type ovens involving rather cumbersome and superfluous handling needed to be replaced.

The Solution
Removal of the moisture from the bottles is done by forcing compressed air at 200° F., 65 lb. per square inch into them. The air is heated by four Chromalox model GCH circulation heaters. They are controlled by Chromalox temperature and SCR power controllers. Moisture is also removed from the air by a dehumidifying unit and silica gel before it reaches the heaters.


  • Consistently, absolutely dry container and product. 
  • Elimination of cumbersome, excess handling connected with former batch-type heating system.
  • Faster drying. Entire operation now done in one minute compared with eleven minutes before.
  • Quicker heat-up time.
  • No overheating.