For sterilisation, pasteurisation tanks are filled with hot steam. If the steam supply needs to be stopped following this process, the steam must be forced out of the tank using cold sterile air, in order to avoid the tank collapsing due to negative pressure. Without this cold blowing procedure, the steam in the tank would condense on the cold tank walls within a short time and the tank would crumple up like a paper bag. This process is called vacuum collapse, which arises due to hot steam possessing approximately 1,700 times more volume than water created by condensing. Our cold blowing unit forces the water vapour out with sterile air within a short period of time. This avoids the dreaded effect of the tank collapsing. A further task of this system is the filtering of steam and sterile air.

On the one hand, no rust-causing particles are allowed to be carried in with the steam and, on the other hand, the air should not carry in mould, yeasts, bacteria or other micro-organisms. The steam is filtered with a filter in the range of 10-100 μm and the sterile air with approx. 0,2 μm.

With this unit, two tanks can be processed in parallel. Whilst one tank is being sterilised with hot steam, the second tank can be cold blown.

The system is entirely made of stainless steel. It is designed with a manual control, whereby we have taken account of the greatest possible safety of the operator when designing the system.

Our systems are compact and can be designed to accommodate any customer requirements.