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 ?
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.
Three different types of distillation trays were tested: sieve, valve and bubble cap.
The simulation was carried out using both the equilibrium and non-equilibrium stage models for sieve, valve and bubble cap trays.
Remove the Bubble Cap and glue it into the Crafty Snap Setting
95, and includes the Shape Studio Tool, four Crafty Bands, 20 Crafty Snaps, 20 Bubble Caps and adhesive.