Hykarb carbon cubic block cross flow heat Exchanger design pressure process side 7.8 barg @ 0/160 degrees C service side 15 barg @ 0/160 degrees C operating pressure process side 5.2 barg + full vacuum @ -0.185 degrees C service side 10 barg @ 2.417 degrees C 24 pass on process side, 10 pass on service side, unit made from (4) carbon HP2/20 block elements, 536mm block length