Double wall meter prover

Measuring and testing – Instrument proving or calibrating – Volume of flow – speed of flow – volume rate of flow – or mass...

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G01F 2500

Patent

active

044753772

ABSTRACT:
Apparatus for use in calibrating a meter having an outer tubular housing closed at each end, a reduced diameter and reduced length inner tubular barrel supported within the outer house providing an annular space between the exterior of the barrel and the interior of the housings, two spaced apart ports in the housing communicating with the annular area, an annular flange secured to the interior wall of the housing having an opening therein receiving the barrel and an annular flange between the exterior of the barrel and the interior of the housing--dividing the annular space into two portions, the annular flange being arranged so that the barrel may be easily and expeditiously removed while ensuring that no leakage occurs past the flange, a free piston in the barrel and piston detection switches spaced apart on the barrel providing means of indicating passage of precise amount of gas or liquid through the barrel.

REFERENCES:
patent: 3273375 (1966-09-01), Howe
patent: 4372147 (1983-02-01), Waugh et al.

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