AQT Steam Vortex Flow Meter

Vortex frequency is related to velocity within the operating range. Line volumetric flow describes volume at operating conditions. Steam mass flow uses steam density at the measured state. For dry saturated steam, pressure or temperature can establish saturation density when the saturated state is known. For superheated steam, confirm the pressure and temperature inputs and the compensation method. Identify condensate and possible wet-steam operation when sizing the meter.

Installation and selection

Provide the steam state, normal and limiting absolute pressure and temperature, pipe size, minimum and maximum flow, and the units the control system expects. Confirm the straight runs, required compensation instruments and available outputs for the selected version.

The published series overview lists a −25 to +300 °C temperature interval, a range ratio up to 10:1, and general accuracy references of ±1.0% for liquid and ±1.5% for gas. Confirm the limits and accuracy basis for the selected steam configuration. The range table below retains the listed values. Verify the flow basis, steam state and operating conditions with Apure before using its entries for sizing.

Published range reference

Nominal path(mm)	Flow range ( m³/h )
liquid	gas	steam
25	0.8~12	7.2~60	12~120
40	2~30	18~180	30~300
50	3~45	20~300	50~500
65	6.5~84	54~540	84~840
80	10~130	70~700	120~1200
100	20~200	12~1200	200·2000
125	32~320	200~2000	320~3200
150	45~450	240~2400	440~4400
200	90~900	480~4800	800~8000
250	12~1200	740~7400	1200~12000
300	15~1500	1000~10000	1780~17800