Apparatus for regulating the transport flow of a liquid that is circulated by a centrifugal pump in a closed pipe system

摘要

PCT No. PCT/EP92/02970 Sec. 371 Date Jul. 18, 1994 Sec. 102(e) Date Jul. 18, 1994 PCT Filed Dec. 21, 1992 PCT Pub. No. WO93/14450 PCT Pub. Date Jul. 22, 1993In a closed pipe system, the apparatus regulates the transport flow of a liquid that is circulated by a centrifugal pump. The pump has a characteristic curve that falls in the direction toward zero transport flow from a design point. That is, as the volumetric flow decreases, the pump head increases.