These systems can include low or high speed, with or without bed,
variable or constant pressure, under the condition of pressure or vacuum, St or
Cr - Ni materials. In addition to that, if it is possible to leak from the
tanks as a reason of oiling and cooling, these tanks must include soft gasket.
On the other hand it can include mechanic gasket. Moreover, these tanks can
include internal - external coil or jacket as well.