Application Success


Make: Custom Built Ribbon Blender
Industry: Food and Beverage


On a custom ribbon blender blending flour recipes for the tortilla and masa flour market, the customer was constantly replacing rope packing within the air purged stuffing box. Air was pumped into the packing stuffing box to try and push back against the flour making its way out of the trough. Flour would eventually leak out and pile up against the pillow block and onto the floor, making a huge mess.

This caused safety concerns and increased maintenance costs by adding extra overtime hours to clean up the mess. The product that leaked out of the vessel would have to be thrown out, causing significant product loss.


An Inpro/Seal® Air Mizer® Food Grade shaft seal was installed at both the drive-end and non-drive-end on a single mixer in 2019. The Inpro/Seal Air Mizer is a non-contacting, non-wearing permanent shaft seal that permanently protects against product loss and contamination. Its unique design fully articulates to handle angular, radial and axial shaft movement simultaneously.


Since the mixer was upgraded with Air Mizer shaft seals, they have had no issues. The customer is extremely happy with the change.

Leaking ribbon blender with air purged stuffing box
Ribbon blender installed with Air Mizer Food Grade shaft seal
Air Mizer shaft seal cutaway
Air Mizer Food Grade shaft seal with flat bottom accommodates installation requirements

Maintenance-Free Shaft Sealing

Inpro/Seal Air Mizer shaft seals provide permanent protection against product loss and contamination on industrial process equipment. With a unique, non-wearing design, Air Mizer seals are maintenance-free and constructed to last the lifetime of your equipment.

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Air Mizer Smooth Bore shaft seal

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