Coalescence – Liquid particles in suspension that unite to create particles of a greater volume.
Conventional Gas-Liquid Separator- Vertical or horizontal separators in which gas and liquid are separated by means of gravity settling with or without a mist eliminating device.
Critical Diameter- Diameter of particles larger than which will be eliminated in a sedimentation centrifuge.
Density – The density of a homogeneous substance is the ratio of its mass to its volume. The density varies as the temperature changes and it is usually expressed as the mass per unit volume at a specified temperature.
Absolute Density –The mass of a substance per unit volume at a specified temperature.
Relative Density – The ratio of the mass of a given volume of fluid to the mass of an equal volume of pure water at the same temperature and pressure.Relative density replaces the term “specific gravity”.
Relative Density At 60 degrees- Fluid relative density measured against water with both materials at 60 degrees F and reference pressure of 14.696 psia (or equilibrium pressure). Equivalent to“RD 60/60”
Demister Mist Extractor- A device installed in the top of scrubbers, separators, tray or packed vessels, etc. to remove liquid droplets entrained in a flowing gas stream.
Design Pressure – The pressure used in the design of a vessel component for the most severe condition of coincident pressure and temperature expected in normal operation Disengaging Height- The height provided between bottom of the wire-mesh pad and liquid level of a vapor-liquid separator.
Entrainment – A process in which the liquid boils so violently that suspended droplets of liquid are carried in the escaping vapor.
Gas-Liquid Separator -vertical or horizontal separators in which gas and liquid are separated by means of gravity settling with or without a mist eliminating device.
Highspeed mist eliminator – separator removal of very small droplets can be achieved using a two stage mist eliminator by fitting a mesh pad to the upstream face of the unit to coalesce droplets as small as 4 to 5 microns into droplets in the size range which are easily removed by the vane separator
Knock-Out- A separator used for a bulk separation of gas and liquid.
Mist Cyclone Eliminator – separator multi-cyclone elements are designed specifically for the removal of high levels of liquids and solids from gas in a single separation stage.
Operating Pressure – The pressure at the top of the vessel at which it normally operates. It shall be lower than the MAWP, design pressure, or the set pressure of any pressure relieving device.
Operating Temperature -The temperature that will be maintained in the metalof the part of the vessel being considered for the specified operation of the vessel
Pressure drop- the difference in total pressure between two points of a fluid carrying network. A pressure drop occurs when frictional forces, caused by the resistance to flow, act on a fluid as it flows through the tube.
Separator- a cylindrical or spherical vessel used to isolate the components in mixed streams of fluids.
Settling velocity – The velocity reached by a particle as it falls through a fluid, dependent on its size and shape, and the difference between its specific gravity and that of the settling medium; used to sort particles by grain size.
Target Efficiency- The fraction of particles or droplets in the entraining fluid of a separator, moving past an object in the fluid,which impinge on the object.
