Ratio of common flow Q3 to minimum flow Q1.
The flow characteristics of ultrasonic water meter are determined by Q1, Q2, Q3 and Q4, according to the common flow rate Q3 (to m3/h is the unit) and the ratio of Q3 to the minimum flow Q1. Q3 ranges from 1, 1.6, 2.5, 4, 6.3, 10, 16, 25, 40, 63, 100, 160, 250, 400, 630, 1 000, 1 600, 2 500, 4 000 and 6300, and can be developed to higher or lower values by series. Turndown ratio Q3/Q1: ranges from 10, 12.5, 20, 25, 31.5, 40, 50, 63, 80, 100, 125, 160, 200, 250, 315, 400, 500, 630 and 800, and can be developed to higher or lower values by series. Q2/Q1:1.6 for water meter with nominal diameter less than or equal to 50mm and common flow Q3 not exceeding 16m3/h; It may be 1.6, 2.5, 4 or 6.3 for water meters with nominal diameter greater than 50mm and common flow Q3 exceeding 16m3/h. Q4=1.25Q3.
Post time: Mar-31-2023