VALVE n.
a kind of balance valve usually consisting of a movable, open-ended, turban-shaped shell provided with two faces of nearly equal diameters, one above another, which rest upon two corresponding seats when the valve is closed. -- Equilibrium valve. (a) A balance valve. See under Balance. (b) A valve for permitting air,…
VAPOR n.
nd heating filter papers, precipitates, etc.; -- called also air bath. A modified form is provided with a jacket in the outside partition for holding water, or other volatile liquid, by which the temperature may be limited exactly to the required degree. -- Vapor burner, a burner for burning a vaporized hydrocarbon.…
WHIRLING n.
a. & n. from Whirl, v. t. Whirling table. (a) (Physics) An apparatus provided with one or more revolving disks, with weights, pulleys, and other attachments, for illustrating the phenomena and laws of centrifugal force, and the like. (b) A potter's wheel.