Originally developed for the most extreme conditions of aerospace applications, VULKAN's LOKRING® tube connection technology has been continuously developed for domestic and commercial refrigeration as well as air conditioning applications.

Since 1979, we've continuously applied the expert knowledge gained as an original equipment manufacturer for the industry to our braze-free tube connections, providing customised solutions for tube connections used in the manufacture, installation and maintenance of refrigeration and air conditioning equipment. As the market leader in braze-free, permanent tube connections, we can supply a matched system of tube connections in original equipment quality and with all necessary certifications for almost any installation or service application.