Blower-Assisted Mist Eliminator:

This model is designed for oil systems that cannot withstand back
pressure or where back pressure may not be desirable. It can be
installed with an airflow-restriction device to pull vacuum. It is also
designed to maintain atmospheric condition in the oil system.

Coalescer-Only Mist Eliminator:

This model is appropriate for use where back pressure on an
oil system is not a concern. It can be sized large enough to
meet pressure-drop requirements. It also can be used where
an existing blower is present to assist flow.