As these air filters are high-efficiency, absorbent type, depth filters; periodic changes of the cellulose elements are required. The effective life of the element will depend on the moisture content of the compressed air and the flowrate. 

As conditions vary widely between applications, only general guidelines can be provided for filter change intervals. Actual change interval should be determined in the field. 

Dry Air Conditions – When used in relatively dry conditions, such as downstream of a desiccant dryer or refrigerated air dryer, the change interval should be several weeks. When first installed, the element should be examined after two weeks to determine proper interval. 

Moist Air Conditions – When used on a compressed air system with no drying equipment, change interval will be greatly reduced. When first installed, the element should be examined daily until the proper interval is determined. A dry element will absorb approximately 6 to 8 fluid ounces of liquid and should be changed before it becomes completely saturated. 

Extremely Moist Air Conditions – Under these conditions, a water separator, with a drain, should be installed in the air line directly upstream of the filter. The separator will remove a large majority of the condensed moisture in the airstream, effectively extending the life of the cellulose element in the Motor Guard filter. 

To prevent damage to your air system and components, only genuine Motor Guard replacement elements should be used.