Badger Meter Vortex Meters - Manual (Page 7)

7 09-VRX-UM-00408 07/12
Upstream Obstruction
Minimum Required Straight-run Pipe
Diameters Upstream from Meter
90° Elbow 10
Two 90° Elbows, Same Plane 15
Two 90° Elbows, Diff erent Planes 20
Flow Straightener
(recommended when ever an axial swirl exists in the fl ow stream)
10
Fully Open Shut-off Valve 5
Downstream Obstruction
Minimum Required Straight-run Pipe
Diameters Downstream from Meter
Control Valve 5
TABLE 1 - MINIMUM PIPING REQUIREMENTS
NOMINAL SIZE
INCH (mm)
GALLONS PER MINUTE (gpm) LITERS PER MINUTE (lpm)
Minimum Flow Maximum Flow Minimum Flow Maximum Flow
4.0 (100) 79 635 300 2,403
6.0 (152) 180 1441 682 5,454
8.0 (203) 312 2,495 1,181 9,444
10.0 (254) 492 3,933 1,861 14,886
12.0 (305) 698 5,582 2,641 21,130
14.0 (356) 843 6,746 3,192 25,537
16.0 (406) 1,102 8,813 4,170 33,360
18.0 (457) 1,394 11,155 5,278 42,226
20.0 (508) 1,733 13,864 6,560 52,481
Based on water at 1 centistoke at 73° F, schedule 40 pipe 1 to 20 fps (0.3 to 6 mps). For reference only, consult sizing
program for temperature and pressure conditions other than those listed here.
TABLE 2 - FLOW RANGES