We manufacture tube heat exchangers that offer solutions for transferring of fluids, lubricating oil, power pack oil and other process coolants. The range is offered in a wide range of 4" to 10" shell diameter suitable for load ranging from 1500 kcalhr to 75000 kcalhr (2 hp to 100 hp).heat exchangers transfer heat from a hot fluid to a colder fluid through the combined mechanisms of conduction and forced convection. In most tube heat exchangers, a metal wall separates the two fluids.