Circulation pumps type CO are single-stage centrifugal pumps with tightly-closed casings to be mounted in ?in-line? arrangements.

Mono-block circulation pumps type TL with stuffing box are designed for use in medium-sized central heating installations to be mounted in ?in-line? arrangements (pipelines).

Centrifugal pumps type PJB block-combined with electric motor are designed for use in pumping pure or slightly polluted cold or hot water.