Labyrinth Sealing Ring : A type of clearance ring in a centrifugal pump in which the ring is an integral part of the impeller; it mates with a groove in the pump housing. See also: Clearance Ring
Ralph W. Burklin & Robert G. Purington, Fire Terms: A Guide to Their Meaning and Use, National Protection Association, Boston, MA 1980 USA. (Guide: Meaning and Use, Nat Prot Association Fr Srvc - Amer) {457}