#Retorts or #Autoclaves, whatever you name the machine, #sterilizers, come in various executions where the most significant difference comes from the way the product is heated.

You have different ways of heating and you may discuss the efficiency of each process, but in this case we focus on explaining an important difference between steam/air and steam/air.

In contrary to retorts which apply water to heat the product, like water spray, cascading or full immersion systems, the steam/air retorts use direct steam in the retort chamber to heat the product. This allows a direct transfer of the condensation heat to the product, giving a very high efficiency of heat transfer. In order to regulate the temperature in the machine, more or less steam is injected. This is all rather clear.

What is less clear apparently is the type of steam/air processes offered in the market, creating doubts at customers and creating wrong arguments against this very efficient technology. The reason is that for commercial reasons, wrong parameters are compared. We would like to explain this in more detail.

If we look at a very old steam retort, the steam is simply injected in the retort chamber without any distribution or circulation. We would call this a steam retort and not a steam/air retort. However if you look tot he IFTPS Guidelines, you can conclude that a retort with direct injection only, still can be called a steam/air retort.

Now the most famous supplier for the steam/air technology, the inventor of this technology, company LAGARDE Autoclaves from France does not supply this simple steam injected machines, but applies the highly efficient, as defined by the IFTPS – Steam/Air with Forced Flow Steam.

Industrial retorts autoclave Lagarde steam/air green technology sterilization pasteurization