For more than 35 years now, VULKAN Lokring's success has been founded on worldwide patented, unique connecting elements for refrigerant lines. Originally developed for the absolute extreme conditions of space technology, we have continually improved our connections to meet the requirements of air conditioning technology, thus developing into the leading specialist in this area on the world's market.

LOKRING is the preferred alternative to brazing as it is more cost effective, delivers better quality with less failure and leak rates, as well as being faster. Furthermore, it provides an excellent opportunity to switch tubes and components of the cycle system to cost saving materials (e.g. aluminium).

LOKRING directly saves the costs for silver solder and highly trained operators. Meanwhile, LOKRING indirectly reduces potential brazing cost implications that might occur through leaks, corrosion, harmful fumes, damage, burns or tube preparations. LOKRING may even reduce the number of joints needed and the consumption of expensive Cu components.

The patented LOKRING® tube connection system provides an innovative system of solder-free tube connections for every installation situation in refrigeration and air-conditioning technology.