Graded-density wire mesh demisters use different mesh structures through the pad thickness so that open upstream layers handle heavy liquid loading while denser downstream layers provide finer polishing. The design can improve hydraulic balance compared with one uniform mesh grade.

The K-factor in mist eliminator velocity calculations is separator- and service-dependent, not universal. Mesh or vane geometry, liquid loading, drainage, fouling, orientation, and operating margin all affect the practical allowable velocity.

Nm³/h, Sm³/h, and actual m³/h can represent very different volumetric flows. Mist eliminator velocity should be calculated from actual gas flow at operating temperature and pressure, with the flow basis clearly defined.

A mist eliminator specification should define outlet carryover, inlet liquid loading, droplet-size basis, operating cases, and allowable pressure drop rather than relying only on a generic percentage efficiency. This creates a measurable and comparable performance requirement.

Packed-bed flooding can greatly increase and destabilize the liquid load reaching a mist eliminator. High downstream carryover may therefore originate from excessive gas/liquid loading, packing fouling, or maldistribution below the demister rather than from the separator itself.