CONTRA F L 0 LI) CORKIRL HERT EXCHANGERS The steel/copper coaxial heat exchangers of Thermokey are designed for a number of applications.The most common ones are condenser and evaporator appli- cations. Other available units are specially designed coaxial heat exchangers for air applications or units incorporated in a tank. The high efficiency of the coaxial units of Thermokey is guaranteed by the execution in co-current flow. QUALITY ASSURANCE All the coaxial heat exchangers are subject to a testing with a 30 bar pressure in water bath fot both circuits. Each heat exchanger is pre-charged with nitrogen (1 bar) in order to avoid the formation of humidity and to maintain the tubes perfectly clean. TECHNICAL DATA