SORG: Oxygen Metering Trim – a technology update and benefits

2015-12-20 | Product news

After introducing the Oxygen Metering System for forehearth operation in 2001, SORG has continued to carry out product development and, in this article, the company shows us how it this product – in its new and improved format - is by far the best yet, by adjusting the premix ratio.

OMT burner directly on the forehearth
Introduction
Normally the air/gas mixture of each heating zone is measured with a manual measuring device. These devices have an electro-chemical oxygen sensor. For the normal adjusting procedure of forehearths this is considered in the world-wide glass industry as sufficient and is state-of-the-art. With this kind of measurement, electro-chemical or paramagnetic oxygen analysers are measuring the volumetric content of the oxygen molecules in the unburnt gas/air mixture.
Due to their measuring principle, electro-chemical or paramagnetic oxygen analysers are unfortunately not able to recognise heating value changes and modifications in the humidity content of the gas/air mixture. Thus they are also not suitable for the control of the gas/air mixture.
We must also remember that the meters used to measure the oxygen content of the premix are subject to certain tolerances, and that the chemical cell contained in the instrument also has a limited life and will start to give different values after a certain period, independent of whether it has been used frequently, occasionally or not at all.
On colouring forehearths it can be vital to maintain a defined atmosphere above the glass in order to obtain a specific colour, and once again an automatic system simply offers more certainty that the required quality (in this case the colour) will be achieved.
SORG introduced the first Oxygen Metering System for forehearth operation in 2001. Continuous product development has always been a...




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Article taken from Glass Machinery Plants & Accessories bi-monthly magazine (6 issues per year)
Year: 2015 number: 6
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