bubble cap

bubble cap

[′bəb·əl ‚kap]
(chemical engineering)
A metal cap covering a hole in the plate within a distillation tower; designed to permit vapors to rise from below the plate, pass through the cap, and make contact with liquid on the plate.
References in periodicals archive ?
4 metres in diameter, were treated on the inner shell and at the bubble cap and support ring areas.
Positive pressure ventilation with hydrostatic pressure adjustment Fisher and Paykel Bubble Cap
The Aspen Plus[TM] RATEFRAC Module uses the Chan and Fair, Scheffe and Weiland and Grester mass transfer correlations for sieve, valve and bubble cap trays, respectively.
Three different types of distillation trays were tested: sieve, valve and bubble cap.
Teesside University is looking for a supplier of distillation columns consisting of a bubble cap column, combined packed and bubble cap columns and an absorption column.