VULKAN Lokring refrigeration and air conditioning
Benefits and Areas of Application

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.

LOKRING tube connections can be made without a great deal of force being necessary, using simple hand assembly tools. LOKRING ensures an absolutely clean, permanent and purely mechanical tube connection with long-term hermetic air-tightness.


This is confirmed by the special TÜV test and approval. All this makes LOKRING tube connections one of the most economical and reliable methods of connecting refrigerant tubes.

The Benefits

  • Approx. 40 % time saving
  • Absolutely clean, efficient and reliable
  • Installation work during business hours and
    public access
  • Installation work in situations where there is a
    fire hazard
  • Light hand assembly tool without energy exertion
  • Installation can also be carried out by non-skilled workers
  • No nitrogen as purge gas
  • No solder-related quality problems


Areas of Application

  • Air conditioning systems (split, multi-split, VRV, HVAC)
  • Commercial product refrigeration
  • Heat pumps
  • Solar thermal energy
  • Geothermal energy



One System - Endless Possibilities
  • Straight connections
  • Straight reducing connections
  • Flare-fittings
  • Elbows
  • Branches
  • T-connections
  • Special connections