Inlet Devices play an important role in overall performance of a separation vessel or mass transfer column.

Traditional inexpensive devices that are commonly used at low momentum liquids but negavily affect separation at high momentum are:

A) impact plate

B) dished head

C) half open pipe

D) open pipe at vessel head

However, for higher-momentum streams these inlets can cause problems such as shearing of incoming liquid droplets. more difficult to separate. foaming and liquid short-circuiting or channeling.