Shaft seal coolant flow control
US5456286A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 21, 1994 |
| Grant date | Oct 10, 1995 |
| Priority date | — |
| Expiry date | Jul 21, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/87153
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
For a shaft seal for a pump, a barrier fluid flow and pressure control method, system, and apparatus providing a manifold having oppositely axially arranged flow and pressure control valves, the control valves having open-ended valve cylinders reciprocally adjustable within flow channels of the manifold, the valve cylinders having elongate flow orifices selectively positionable within the flow channel with said orifice in selective registry with a respective outlet. The extent of registry of the elongate orifice with the respective outlet controls the rate of flow through the valve. The pressure control valve sets the barrier fluid pressure while the flow control valve sets a minimum flow required for the barrier fluid operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.