Document Type and Number:
Japanese Patent JPS4845814
Kind Code:
A
Abstract:
A device for preventing back-flow through one of several centrifugal pumps connected in parallel in a common circuit when the impeller of the pump is stationary. The device has a closure member in the form of a cylindrical relatively rotationally displaceable closure element, which in one position permits free passage of the back-flow and in another position closes off the back-flow. The closure element has guide elements which are angularly displaced about the axis of rotation of the pump impeller in one direction by the swirl of the stream of medium being conveyed.
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Application Number:
JP9911572A
Publication Date:
June 30, 1973
Filing Date:
October 04, 1972
Export Citation:
International Classes:
F04D13/02; F04D3/00; F04D7/08; F04D9/00; F04D13/06; F04D13/14; F04D15/00; F04D29/046; F04D29/14; F04D29/18; F04D29/54; F04D29/58; F16C17/08; H01F30/12; H02J3/38; H02K3/12; H02K3/28; H02K3/38; H02K5/12; H02K5/128; H02K5/132; H02K5/167; H02K7/11; H02K9/19; H02K17/12; H02K17/16; (IPC1-7): F04D13/06