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Stocker’s are targeting your primary milk cooling, before secondary chilling in order for you to save money.

At Stocker Solutions, we are focused on giving you results. We have made it our mission to improve your primary milk cooling, in order to save you long term costs, before considering secondary chilling options.

Our proven consultation process monitors your existing system to provide you with accurate data, on your milking temperatures.

We then analyse and present our findings to you in a visual presentation, along with recommendations best suited for your situation.

With our ultra-efficient primary cooling equipment and direct plumbing knowledge, we believe we’ve got the right solutions to provide you with an improved and more compliant system, before considering the need for more expensive investments in refrigeration equipment.

Three Key Questions

When looking at making your system compliant, or more efficient, there are three key questions we ask.

  1. Do you have an existing system that is almost compliant that could do with some tweaks?
  2. Do you have good ground water temperatures?
  3. Do you want something with low ongoing running costs? (ie. passive cooling system)

All of these questions help us realise that our specialised cooling team can help you comply and help run your cooling system more efficiently.

The Regulations

The new cooling regulations in NZCP1 state:

(2) Raw milk must:

a) be cooled to 10ºC or below within four hours of the commencement of milking; and
b) be cooled to 6ºC or below within the sooner of:

i) six hours from the commencement of milking, or
ii) two hours from the completion of milking; and

c) be held at or below 6ºC without freezing until collection or the next milking; and
d) must not exceed 10ºC during subsequent milkings.

(3) In situations where there is continuous or extended milking, such as automated milking systems, the milk must enter the bulk milk tank at 6°C or below. “Continuous or extended milking” is defined as milking for six hours or longer from the time that milk first enters any bulk milk tank

A common misconception is that your milk must go into the vat at a certain temperature. This is not the case, as the regulations apply to the milk temperature in the bulk milk tank/vat.

Our Milk Cooling Consultation Process

We’ve worked hard to nail down our consultation process to get the most information in order to help you out in the best and most efficient way.
Being a GEA Service Partner also gives us access to some of the best knowledge and products in order to help you out. If our consultation shows that you do need secondary chilling, we can help lower the capital equipment cost by adjusting your primary chilling, in order to lower your refridgeration costs. Or we can supply one of our GEA aquaCHILL units to have you snapchilling your milk instantly.



After your initial conversation with our experienced team, we  install our data logging equipment. The logger captures temperatures we need to assess such as water going to and from the cooler, milk leaving the cooler, and the milk in the silo. An onsite assessment of your cooler size and water flow will also carried out.



After the monitoring period is completed, data is returned, analysed and then formatted into a visual presentation (no spreadsheets here).



Once we have your visual presentation done, we will present you with options best suited for your situation based on our findings. Generally a minimum of two options are available.



Based on our visual presentation and provided options we will carry out improvements to your cooling system. These can be passive systems such as water or cooler alterations, through to significant upgrades such as chilling options.

Case Study: Before & After

Stocker Solutions were called in January to undertake a Milk Cooling Consultation at one of our clients farms. Their milk temperatures were not meeting Fonterra’s compliance standards (the silo temperature was unable to reach below 6deg at 2 hours after the end of milking, also the silo temperature was becoming warmer than 10deg during the next milking). The customer wanted us to assess their options as they had already been quoted a large expensive new chilling system from their refrigeration provider, but wanted to save a large capital outlay this late in the milking season.

We arranged a visit to our clients farm and installed our data logger to measure their milking data over 4 days. Current milk and water flow readings were taken and current spec. of their setup was assessed. The data was then analysed and to find that their ground water temperatures were very good (at approximately 13.5deg), but primary cooling was not working efficiently (the average temperature of the milk was entering the silo at 20.1 degrees). Typically to have an “efficient cooler” the difference between the water supply and the milk leaving the cooler should be 2-3deg.

After looking at the data we recommended a few different options. Our largest GEA aquaCHILL unit was quoted as a suitable option, an alternative option was our ultra efficient plate cooler. The advantage of the aquaCHILL unit  in this case is the was that once installed and commissioned, milk would have been immediately entering to silo as low as 5 deg. However, in this case there was a large capital outlay and an additional requirement for an upgrade to the current switchboard to handle the additional power load. The plate cooler option had no additional running costs or water consumption above their existing system.

Our client decided immediately to select the plate cooler system upgrade which made their system compliant straight away (for the rest of the season). This avoided a large capital outlay before the end of the season. By upgrading the plate cooler system now, with its improved performance, they have downgraded their chilling needs from the largest aquaCHILL unit to the smallest of our four units, and the installation can be deferred to nearer the peak of the next season. The requirement for the smaller unit now means they will not have to upgrade the switchboard previously required for the largest unit.
By carrying out this upgrade, we have made this customer immediately compliant, saved total cost of installation and lowered ongoing operating costs.

After the new system was installed, the data logger was on site for another 4 days to assess temperatures. These result continue to amaze the team here at Stocker’s where the temperature differences between water and milk are less than 1 degree (compared with the industry standard of 2-3 degrees). Water supplied to the cooler was measured at a median of 13.7 degrees, with the median milk temperature leaving the ultra efficient cooler at 14.4 degrees, a difference of 0.7 degrees.

In conclusion, we’ve made our client compliant with current regulations, with a lower cost outlay, and also future proofed their system for the future, all while keeping operating costs low. Definitely a Result for Success.

Enquire about your Cooling System Today

Complete the form today to find out how we can turn your cooling enquiry into a result for success.