A tunnel washer’s transfer method is critical because it’s the way the machine introduces each batch of goods into the next part of the process. Bottom transfer tunnel washers transfer the goods and all dirty water forward to the next compartment with each full rotation, in all single-drum sections, so the goods are exposed to the same dirty water during each transfer within that section.
Milnor top transfer CBW® washers lift each batch of goods out of the water, drain the free water, then slide the goods into the next compartment, where they are introduced into cleaner water. Only the water in the goods moves forward. Significant dilution occurs during transfer itself.
True Top Transfer effectively doubles the amount of dilution in each module – once from counterflow, and then from transfer. This significantly reduces the number of modules needed to properly wash in a Milnor CBW washer versus other tunnels.
Milnor’s top transfer feature assures bath integrity. Baths are truly independent, so the wash chemistry can work as planned, targeted to the individual modules. Chemicals don’t migrate uncontrollably to subsequent baths. Titrations show that with a Milnor, it is far easier to control pH.
The dilution advantage
Dilution with successive baths, each with cleaner water, is a Milnor CBW advantage. Time, temperature, chemicals, and mechanical action are the classic, essential elements of the washing process. These four things loosen soil from the goods and disolve/suspend soil in the water – but these catalysts can only remove soil if water washes it away with dilution. With the unique combination of True Top Transfer and counterflow, Milnor CBW washers dilute better and faster than any others.
Superior cylinder design
All modules of a Milnor CBW washer are identical in size with a goods-to-cylinder volume ratio of approximately 1.4 lb/ft3 (1:40). Milnor’s large cylinder volume allows water and chemicals to penetrate goods completely and quickly. The use of equivalently large cylinders throughout creates constant high mechanical action during the washing process. 67% of the cylinder’s area is perforated so water and chemicals can intermix fast and suspended soil flows easily out of the cylinder to the drain.
Solid welded partitions
With a solid partition between each and every wash cylinder, Milnor keeps all baths independent. Water travels over weirs and via external piping from one module to the next so there is absolute water control. Each module can be used for different baths. The solid partition between modules is welded to the fixed outer drum giving complete bath separation without sliding seals.
Baths stay separated
Better bath integrity lets chemicals work as intended because baths don’t migrate between modules. Concentrations in a Milnor are controllable, predictable and consistent because the baths remain completely independent during chemical activity.
No seals below the water line
There are no inter-module seals beneath the water line which could wear and leak, compromising wash quality. Without such seals, maintenance costs are reduced!
Steam injection
Steam is injected at the bottom of the shell through a Venturi device, mixing it with water. This eliminates the exposure of goods to live steam and water is immediately heated as it enters. The location of steam injection also increases water turbulence.
Milnor’s optional Steam Disinfect feature can provide programmed steam cycles for any or all modules and for PulseFlow tanks and extraction-device water reuse tanks, if desired.
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