MU300 Rev1.0 Oct20
Page 16 of 54
General conditions
Install after the elbow
Caution:
DO ensure that the flowmeter is filled. DO NOT make the liquid flow downwards
vertically, or it may have bubbles.
5.2.4 Requirements on the front/rear straight pipe sections
DO ensure a straight pipe section at least ten times of the pipe diameter (D) in the
upstream of the flowmeter and at least five times of the pipe diameter (D) in the
downstream of the flowmeter. The nominal accuracy depends on the pipe diameters in
the upstream; according to the interference, insufficient front/rear straight pipe
sections may cause about 0.5% deviation.
To ensure measurement accuracy of the flowmeter, try to satisfy the following
requirements on the length of straight pipe sections installed nearby the flowmeter:
upstream >20
D
, downstream>10
D.
Try not to disturb the upstream flow distribution. Ensure no valves, elbows or triplets;
try to install the control devices or throttles in the downstream if any, so as to ensure
sufficient pipe flow at the measurement point, details are shown below: