Tunnel Washers - How They Work
Tunnel Washers for the Food & Beverage Industry
General Tunnel Washer Operation
Three section Tunnel Washers (detergent wash, recirculated rinse and final rinse) are the most commonly requested designs, however, the use of a pre-rinse section may be required depending on product residues, sanitation requirements, and desired throughput rate.
Operational overview of a 4-section washer:
- Soiled product containers are conveyed through the Pre-Rinse (PR) section to loosen and flush off heavy particulates.
- The Detergent Wash (DW) section loosens and sprays off the remaining product residue.
- The Recirculated Rinse (RR) removes most of the residual detergent solutions from the product containers.
- The Fresh Water Rinse removes the remaining detergent film.
Note: Final Rinse (FR) water overflows into Recirculated Rinse (RR) and then overflows into Pre-Rinse (PR) to conserve water.

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“Years ago, we implemented two Sani-Matic COP tanks into one of our lines. We couldn’t have been more pleased with the customer service, ease of operation and efficiencies.”
Steve Deery, Production Manager, Brakebush Brothers, Inc |
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