Measuring and testing – Instrument proving or calibrating – Volume of flow – speed of flow – volume rate of flow – or mass...
Patent
1980-02-22
1981-06-09
Swisher, S. Clement
Measuring and testing
Instrument proving or calibrating
Volume of flow, speed of flow, volume rate of flow, or mass...
73201, G01F 2500
Patent
active
042716942
ABSTRACT:
A system for in situ testing of fluid meters is disclosed in which two 4-way valves utilized in combination with a by-pass line such that with the valves in a first position, all the supplied fluid flows through the meter and, in the alternate position, the entire flow of fluid is through the by-pass system completely isolating the meter. In addition, one port of each valve leads to a test connection which is in line with the meter when the valves are in the alternate or by-pass position. This effectively removes the meter from the line and allows test equipment to be connected across the meter for calibration, verification, or other tests to be performed. The valves are preferably designed to operate in unison and such that during position switching, flow is initiated in accordance with the position to which the valve is being switched before flow in accordance with the original position is terminated.
REFERENCES:
patent: 2579656 (1951-12-01), Douglas et al.
patent: 3444724 (1969-05-01), Gilpin
Mersereau C. G.
Swisher S. Clement
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