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	10 PSIG	20 PSIG	40 PSIG	60 PSIG	80PSIG	100 PSIG	120 PSIG
Size 0.5"	2-36	2-50	3-76	4-102	5-128	6-154	7-179
Size 1"	5-127	6-175	10-268	13-359	16-450	19-540	23-628
Size 1.5"	11-363	15-500	23-766	31-1027	39-1285	39-1542	54-1796
Size 2 "	15-581	25-800	38-1226	51-1644	64-2057	77-2467	90-2875
Size 3 "	47-1163	65-1600	100-2542	134-3288	167-4114	154-4934	234-5749
Size 4 "	84-1745	115-2400	176-3678	236-4932	295-6172	308-7400	414-8624
Size 6 "	214-5353	300-7364	451-14295	605-19166	757-26509	839-31785	1059-37043
Size 8 "	360-9517	523-13092	802-25415	1076-34074	1347-47128	1491-56507	1882-65854
Size 10"	595-14870	818-20456	1254-39709	1681-53240	2104-73637	2329-88292	2910-102897
Size 12"	857-21413	1178-29457	1806-57181	2421-76666	3030-106038	3354-127140	4233-148172