Liquid (Fluid) Packed : In horizontal treaters the coalescing section or entire treater may operate completely full if liquid. This condition is referred to as liquid (fluid) packed. (Spec 12L)
The Mudblogger (Oilfield, Energy and Related Photographs), Oil Field Glossary, TX, USA 2014. http://mudblogger.com/oilfield-glossary/, (Oil - Amer) {777}