Combined flow measuring and valve leakage indicator
US4043355A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 22, 1976 |
| Grant date | Aug 23, 1977 |
| Priority date | — |
| Expiry date | Jun 22, 1996 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/8326
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Apparatus for detecting fluid leakage past a control valve in a system for controlling and measuring the flow of a fluid in a conduit of the type having first and second control valves, a flow sensing element of the differential pressure type located in the conduit between the control valves and a differential pressure flow rate indicator connected to the flow sensing element through high and low pressure conduits. Fluid leakage past the control valve discharges from the isolated portion of the fluid conduit first through the low pressure conduit and then through a vent conduit causing a pressure drop along the low pressure conduit which causes an indication of flow on the flow rate indicator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.