In stock


Pasteurization-cooling plant

Lacta Therm is a milk pasteurization unit designed for the continuous processing and pasteurization of potable milk, cheese milk, yoghurt milk, cream, ice cream mixes and other low acid liquid dairy products.
The unit is able to work together with a separator, a normalizer, a homogenizer and a system for normalizing milk and cream in a stream.

Principle of operation:
Standard Lacta Therm units are automated in order to secure production.
The production process proceeds in strict accordance with the production recipe and with the specified technological parameters.

The entire technological process is divided into the following main steps:— Pre-sterilization;
– “Exit to water mode”;
– Filling with a product;
– Pasteurization / product circulation;
– “Pushing out the product with water”;
– In-place wash.

Before starting production, it is necessary to sterilize the unit by circulating hot water for 20 minutes. After pre-sterilization, the unit cools down to the production temperature and maintains it.
Production can begin when the rest of the equipment is ready to receive pasteurized and chilled milk.
Production begins with filling the plant with water through the surge tank. When the set temperature conditions are reached, the automation asks the Operator for permission to work with the product.
When the Operator has activated the “Start of working with the product”, the unit is emptied of water, and then the product, filling the unit, displaces water from the heat exchanger to the drain under the receiving tank.
The surge tank contains level sensors, a wash head and a hermetically sealed lid, which ensure gentle handling of the product and a high degree of cleaning in CIP installations.

In order to ensure a uniform and gentle heat load on the product, the final heating takes place in a plate heat exchanger using a hot water circuit – the so-called “soft heating”.
The principle of building a “soft heating” system is to heat the product with a heat carrier that is only 2°C ÷ 3°C higher than the temperature.
After heating, the product is kept in a tubular holder for the required period of time. If the pasteurization temperature is too low, an automatic check valve located at the outlet of the holding tube directs the product back to the surge tank.
After passing through the tubular retainer, the product is cooled by the feed product in the regenerative section of the plate heat exchanger.
As a safety measure, the pressure of the pasteurized product is higher than that of the unpasteurized product. If necessary, the product is further cooled with ice water in the post-cooling section.
If the product supply is interrupted or there is a stop at the receiving equipment, the unit switches to the product circulation mode.
At the end of the production cycle, the plant is washed with CIP cleaning using both alkali and acid.
The Operator’s panel serves to control the technological process and select the required commands. The controller manages all processes, as well as processes provided by additional equipment (separation, normalization and homogenization).
On the control panel, an electronic color-screen recorder continuously records: pasteurization temperature, pre-sterilization temperature, cooling temperatures, product outlet temperature and non-return valve position.
The data archiving system records data on production, processed volumes, processing time, critical alarms, type of cleaning in place performed, etc.
The data of the electronic recorder can be displayed on one or more computers in the enterprise network.
POU contains:
The following units are assembled on a stainless steel frame:
– Product surge tank with level sensors, washing
head and hermetically sealed lid – 1 set;
– Centrifugal product feed pump
– Product flow meter — 1 pc.;
– Plate heat exchanger with cooling sections,
regeneration and heating, including dividing plates – 1 set;
– Tubular holder – 1 pc.;
– Hot water unit, including brazed lamellar
heat exchanger, pump, steam valve and
steam trap, expansion vessel,
pressure reducing valve, etc. – 1 set;
– Stainless steel control panel, including
Controller, Operator Panel, Chart Recorder, Electromagnetic
valves and motor starters – 1 set;
– Automatic programs — 1 set;
– Automatic pasteurization temperature control — 1 set;
– Automatic control of separation temperature — 1 set;
– Automatic regulation of temperature of normalization – 1 set;
– Automatic temperature control
homogenization – 1 set;
– Automatic outlet temperature control
product – 1 set;
– Automatic product return on violation signal
temperatures at the inlet and outlet of the tubular holder – 1 set;
– Automatic circulation of the product when it occurs
violations of supply to the installation – 1 set;
– Automatic technological interaction with
inlet and outlet equipment such as tanks and
CIP system – 1 set;
– Automatic control of malfunctions — 1 set;
– Registration of pasteurization temperature, temperature
product at the outlet and the position of the return valve – 1 set;
– Pneumatic sanitary valves with remote
management – 1 set;
– Product pipelines made of AISI 304 steel – 1 set;
– A set of pipes, elbows, valves, internal signal
wiring, pipes for signal wiring and fittings,
required for system installation. – 1 set;


Productivity, L/h1000200030005000
Lenght, mm2800300034004000
Width, mm80080010001100
Height, mm1300150020002600
Steam consumption, kg/h100150200380


Approximate technological scheme of the pasteurizer:


Sterilization plant



plate cooler


Productivity, L/h10002000300040005000 10000 2000025000
Init. milk t°15-2515-2515-2515-2515-25 15-25 15-25 15-25
Cooling t°4-64-64-64-64-6 4-6 4-6 4-6
Refrigeration, kkal/h1900038000570007600095000 190000 292400 400000

Electric baths for milk pasteurization



Diameter, mm7609201035
Height, mm118513352100
Capacity, L160300500
Voltage, V/Hz220-380/50220-380/50220-380/50
Power, kW15, 3722, 8730, 37
Weight, kg115150205