Word forms: (regular plural) seal legs
( Chemical Engineering : Operations , Gas-solid operations )
This seal leg allows material to pass while preventing the escape of combustible gases.
The seal leg consists of a vertical pipe containing a downward-moving packed bed of particles
which offers relatively high resistance to any counterflow of gas.
A seal leg is an open pipe which contains particles that gas cannot leak through.
Collins English Dictionary. Copyright © HarperCollins Publishers