SIZING INFORMATION

The low-end performance of the meter is a function of the fluid’s ability to generate a vortex, which using ultrasonic technology is at the very threshold of when vortices for a given fluid are shed. This threshold is dependent on fluid velocity, density and Reynolds number. The high end of the flow meter is amplitude limited, which ultimately impacts the electronics ability to distinguish one vortex from another. In most cases, this represents 125 ft/sec for gases and 20 ft/sec for liquids.

To guarantee satisfactory performance, we will check every vortex meter application for suitability and will require process medium, pressure, temperature and expected minimum and maximum flow rates. For easy reference, we are providing you with a table (see below) for saturated steam at various pressures. The tables list the minimum and maximum flow capability, between which a flow measurement can be made at stated accuracy. Outside those limits, the accuracy will deteriorate somewhat, the extent of which will depend on the quality of the installation.

Saturated Steam Flow Range Table

(Steam Flow in lbs/hr)

Pipe/Meter Size	25 PSIG	50 PSIG	75 PSIG	100 PSIG	150 PSIG	200 PSIG	250 PSIG
Size 0.5"	2-57	4-90	5-122	6-154	9-217	11-281	14-344
Size 1"	7-199	11-315	15-428	19-540	27-762	35-983	43-1204
Size 1.5"	14-568	22-899	31-1222	39-1542	54-2176	70-2808	86-3441
Size 2 "	28-908	45-1438	61-1955	77-2467	109-3482	140-4492	172-5506
Size 3 "	57-1816	90-2876	122-3910	154-4934	218-6964	281-8985	344-11013
Size 4 "	113-2723	180-4314	244-5865	308-7400	435-10446	562-13477	688-16519
Size 6 "	309-8355	489-16765	665-25190	839-31785	1184-44870	1527-57889	1872-70952
Size 8 "	549-14853	869-29805	1181-44782	1491-56507	2104-79768	2715-102913	3328-126138
Size 10"	857-23208	1358-46571	1846-69973	2329-88292	3288-124638	4242-160802	5199-197090
Size 12"	1234-33419	1955-67062	2658-100760	3354-127140	4735-179478	6109-231554	7487-283809