Dwyer PUX - Manual (Page 30)

7 - 1
7.1 Selection of mounting location
Detector mounting location, i.e., the conditions of the pipe subjected to flow rate measurement exert a
great influence on measurement accuracy. So select a location meeting the conditions listed below.
(1) There is a straight pipe portion of 10D or more on the upstream side and that of 5D or more on the
downstream side.
(2) No factors to disturb the flow (such as pump and valve) within about 30D on the upstream side.
7. MOUNTING OF DETECTOR
L 10D
Detector
L 50D
L 30D
Flow control valve exists on upstream side. Flow control valve exists on downstream side.
L 10D
L 10D
L 10D
L 5D
L 30D
1.5D
L 50D
More than
0.5D
More than
10D
More than
10D
D
L 5D
L 5D
Check valve
P
Stop valve
More than 10D
90
°
bend
Tee
Diffuser
Reducer
Valves
Pump
Classification For upstream side For downstream side
Extracted from Japan Electric and Machinery Industry Society (JEMIS-032)
BULLETIN F-68