The cleaning of mixing devices is a long, hard work. The mercury-free PU material from various manufacturers, required
starting from 2017, accumulates faster and more aggressively in mixing devices. LiSEC recognised the need to take action
and developed a thermal flushing device: The TPD-A230.
According to EU standard no. 848/2012 dated 19th September 2012, after 10th October 2017, no material or mixture may be
manufactured, marketed, or used if the mercury concentration in the mixtures amounts to or exceeds 0,01 per cent by weight. This
also applies to PU materials containing mercury that are used in the production of insulating glass elements.
The TPD-A230 thermal mixing cleaner from LiSEC is a semi-automatic flushing device for flushing and cleaning sealing mixing
sections with the use of thermal cleaning fluids. This solution, which is based on the operational know-how of LiSEC, offers
benefits from both a technical as well as a commercial perspective.
The cleaning product container is filled with the required cleaner and the fully assembled mixer is placed in a hermetically sealed
cleaning box. This is then connected with the cleaning circuit via the material connections. The cleaning itself takes place at a
temperature of 230°C and at a pressure of up to 120 bar.
The TPD-A230 consists of a closed system, whereby the cleaner unit heats up quickly and no contact with the hot cleaning
material is necessary. Another important feature is the fact that the mixing facility no longer needs to be disassembled prior to
cleaning. The advantage of this is that the component remains preserved (no damage) and that its functionality remains intact
A mixing line is cleaned in two modes. In the first mode, the remaining sealing material is removed and disposed of directly. In the
second mode, the remaining materials that have accumulated on the edge are removed via a closed circuit. After cleaning with the
TPD-A230, there are hardly any residues. Even material-supplying areas that are difficult to access can be cleaned thoroughly. The
TPD-A230 is also designed very compactly and may be easily transported using a forklift or a lifting carriage.
From an economical perspective, the greatest advantage is likely the fact that the mixing devices no longer need to be dismantled
by hand first and then cleaned. The conventional approach for this type of process means at least three hours of work, but with
the TPD-A230 it takes only fifteen minutes of manual work per application. Furthermore, no permanent monitoring is required; a
timer switches off the TPD-A230 independently.
The previously mentioned compact design also has the advantage that the entire circulatory system is well insulated, which has a
positive effect on energy consumption.
Employees also benefit from using the TPD-A230. Because a closed circuit is involved, they no longer need to work with poisonous
chemicals and material waste. The workplace suffers significantly less from problems involving odours.