Flow meter prover apparatus and method

摘要: A flow meter prover is disclosed which includes an outer fluid housing having inlet and outlet, a measuring conduit coaxially mounted within the first second sets of apertures adjacent, respectively, upstream downstream ends thereof, barrier annular cavity between conduit, controllable piston actuating rod axially projecting from side where free end extends through housing, bypass valve connected outlet detection switches spaced apart along length conduit. There are provisions for automatically correcting variations in dimensions due to temperature. The also apparatus continuously monitoring integrity seals, may be operated with equal pressure on both sides piston.