NDLI: Valve malfunction detection apparatus

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Valve malfunction detection apparatus

Content Provider	NASA Technical Reports Server (NTRS)
Copyright Year	1993
Description	A detection system is provided for sensing a malfunction of a valve having an outlet connected to an end of a first pipe through which pressurized fluid may be flowed in a downstream direction away from the valve. The system includes a bypass pipe connected at its opposite ends to the first pipe and operative to bypass a portion of the fluid flow therethrough around a predetermined section thereof. A housing is interiorly divided by a flexible diaphragm into first and second opposite chambers which are respectively communicated with the first pipe section and the bypass pipe, the diaphragm being spring-biased toward the second chamber. The diaphragm housing cooperates with check valves and orifices connected in the two pipes to create and maintain a negative pressure in the first pipe section in response to closure of the valve during pressurized flow through the first pipe. A pressure switch senses the negative pressure and transmits a signal indicative thereof to a computer. Upon cessation of the signal while the valve is still closed, the computer responsively generates a signal indicating that the valve, or another portion of the detection system, is leaking.
File Size	543964
Page Count	6
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19930020314
Archival Resource Key	ark:/13960/t3zs7nr6h
Language	English
Publisher Date	1993-07-13
Access Restriction	Open
Subject Keyword	Leakage Malfunctions Warning Systems Orifices Fluid Flow Valves Numerical Control Pipes Tubes Diaphragms Mechanics Detection Bypasses Pressure Switches Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Patent

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