In 1970, SORG patented the revolutionary VSM® vertical glass melting furnace, with its distinctive circular rotating crown. At the time, no one could have predicted the great future that lay ahead for VSM®, but the technology, which helped transform sustainable glass melting, remains unsurpassed to this day.
The figures speak for themselves: since its launch, SORG has delivered over 110 of these systems worldwide, more than 50 since the year 2000 alone.
And the success story continues: in 2025 and into 2026, seven VSM® systems have gone into operation, or are about to be commissioned, across three continents. These VSM® systems cover a range of tonnage from 50 to 200 tpd and produce a wide range of products: from container glass, flaconnage and electric insulators, to insulation fibers, microfibers and sodium silicate.
These figures and the range of applications prove, thanks in part to the ongoing development of the technology, that the fully electric VSM® is more than just revolutionary sustainable technology, it’s evolutionary as well.
With the challenges facing the glass industry, and SORG’s long-established commitment to innovation, it looks likely that the VSM® will continue to lead the way and push boundaries in a modern, sustainable industry.