Fluid handling – Processes
Patent
1978-08-07
1985-10-22
Rosenthal, Arnold
Fluid handling
Processes
13762548, 13762569, 251122, 251324, F16K 324, F16K 1107, F16K 2504
Patent
active
045482233
ABSTRACT:
Hydraulic valves such as hydraulic flow control valves, pressure regulating valves, and servo valves are all formed with metering passageways which reduce and eliminate their susceptibility to electro-kinetic corrosion erosion that occurs at very low quantity flow and at very high velocity when the valves are in their null position or nearly shut off. The metering passages and the metering edges comprising the overall metering passageways are shaped to favorably control the flow characteristics of phosphate ester based fluids, which, if not controlled favorably would produce severe electrokinetic streaming current and its wall current, which would induce electrokinetic corrosion erosion. The shapes and dimensions of the metering passages and metering surfaces are derived from the results of a mathematical quantitative analysis.
REFERENCES:
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patent: 2843351 (1958-07-01), Griest
patent: 2894911 (1957-07-01), Moreton
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patent: 3529702 (1970-09-01), Eckstein, Jr.
patent: 3647176 (1972-03-01), Usry
patent: 3790487 (1974-02-01), Burrous
patent: 4183375 (1980-01-01), Vick
Mattern Jr. Roy E.
Rosenthal Arnold
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