Browse Prior Art Database

Sealless Pump System

IP.com Disclosure Number: IPCOM000081361D
Original Publication Date: 1974-May-01
Included in the Prior Art Database: 2005-Feb-27
Document File: 2 page(s) / 52K

Publishing Venue

IBM

Related People

Gupta, OR: AUTHOR

Abstract

A pumping arrangement is provided in which a sealless pump can be utilized and its associated problems such as seal leaking, seal failure, and shaft seizure can be avoided. A short shaft pump design is possible because of the maintenance of a constant liquid level in the pump section of the container, regardless of liquid loss from the system or pump shutdown.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 81% of the total text.

Page 1 of 2

Sealless Pump System

A pumping arrangement is provided in which a sealless pump can be utilized and its associated problems such as seal leaking, seal failure, and shaft seizure can be avoided. A short shaft pump design is possible because of the maintenance of a constant liquid level in the pump section of the container, regardless of liquid loss from the system or pump shutdown.

The pump 10 is shown mounted vertically to the cover of the expansion tank
12. The expansion tank 12 is divided into two sections, the makeup section 14 and the pump section 16. The liquid level in the pump section 16 is maintained at a given level by the use of a makeup line 18 connected between the two sections. One end of the makeup line 18 is located at the bottom section of the tank and the other end at the suction side of the pump 10. A check valve 20 is installed in the makeup line 18 to allow unidirectional fluid flow from the makeup section 14 to the pump section 16 of the tank.

The fluid in the pump section of the tank is circulated to the system through the supply and manifold 22. The fluid returns to the pump section 16 of the tank through the return manifold 24. A small fluid flow is maintained in the makeup line 18, due to the pressure difference created by the pump 10. This maintains the liquid level in the pump section 16 of the tank at all times.

If there is no liquid loss, the excessive fluid in the pump section 16 of the tank overflows into the makeup section as shown...