Roka Milk Cooling Tanks And The Cooling Process
The popular milk cooling tank manufacturing company, Roka, have been operating from Denmark since the early
1960’s producing quality milk cooling equipment. Roka milk cooling tanks have been exported across the world. At South West Refrigeration we supply new milk cooling equipment including Roka milk tanks and Dairy Master milk tanks. These quality manufacturers have produced products that help the customer keep their milk cooled with minimum effort.
In this article we address some of the different types of milk cooling equipment available and the benefits associated with each of these. However first we shall point out some of the common characteristics of the Roka milk cooling tank. The milk tanks allow milk to be stored at cold temperatures whilst keeping the milk in good conditions. The tanks often have a manhole at the top so that the milk can be inspected. The design of the tank is also well thought out so that when milk needs to be emptied from the tank, all milk is able to flow out with ease so that nothing is left in the Roka milk tank.
You are probably thinking yes the Roka milk cooling tanks are great but how is the milk cooled and kept cold? There are a few different methods of cooling, direct expansion (DX) Instant Cooling and ice bank being the most common.
Direct expansion – plates containing refrigerant surround the tank. When warm milk enters the tank these cool plates then cool the milk.
Instant cooling – the best system for quality and peace of mind. The milk enters the tank at storage temperature insuring minimum agitation and maximum butterfats and protein. Due to smaller condensing units running during the night time tariff this system insures the cheapest pence per litre cooling costs of any system available.
Ice bank tank – instead of cool plates, cool water is produced and this cool water is then circulated around the outside of the tank to keep the milk chilled. The water is cooled as copper tubes with refrigerant inside are placed in water. This then cools the water that is to be circulated. This is often thought to be a beneficial method as the cool water/ ice can be produced at any time ie. Low energy times which can make the process more cost effective.