Jewelry Applications

The Spirflame® Karat 250 is a worldwide patented multi-cell flame generator producing Hydrogen and Oxygen in the absolute perfect 2:1 ratio by the electrolysis of water. Energy is taken from any 230 vac outlet. The consumption depends on the gas production rate and reaches a max of approx 1000 Watt. The flame heating is electronically selected by user and is then automatically stabilized by the electronic control itself.

The KARAT250® is used with goldsmith and dental labs for platinum, gold, silver
and other noble metal soldering tasks, be it very fine or large.

What Karat250® Users Say

Handling is very user friendly. To make a substantial flame size change, close torch valve, change to new nozzle size, open torch valve, ignite gas and continue to work. No re-adjustments needed. Is the gas pressure once selected, despite to gas consumption variations by the torches, fully stabilized by the electronic control. The KARAT250® can therefore be installed remote from work area. To expand supply to eventual later to be added torch stations simply hook another KARAT250® to your gas lines. They will automatically and evenly distribute the load between themselves.

See more details about the gas supply networks.

Permanent sustained gas rate is 250 liter of gas per hour. One KARAT250® can feed several torches.

The automatic gas pressure control effectively suppresses heat power interferences between torches.

The Multicell Electrolyser is a worldwide Spirig patent. The multicell technology creates that high reliability and availability of the SPIRFLAME® system acclaimed by the many users worldwide.

Comparison Standard MONO-cell electrolyser and the patented Spirig® MULTI-cell electrolyser

The well known goldsmith Mr. Giovanni Corvaja prefers since years the Spirflame® technology
The very fine gold and platinum wire works done by Mr. Giovanni Corvaja do not only need a stable hand, but with small flames also a constant heat delivery. Various of his delicate works showed in museums the world over can only be crafted with such a dependable tool. More details on request.

Various users of the Spirflame® in the goldsmith sector:

Giovanni Corvaja, Italien   (Instagram @giovannicorvaja)


If you are a goldsmith and you working with the Spirflame®, please let us know. We can give you and your art a place on our homepage.

Lists will be completed from time to time.