Aalborg Vortex - Manual (Page 10)

5
Note : Straight pipe length on the downstream side to be 5 pipe
diameters minimum. *D = Pipe internal diameter.
To ensure the high accuracy of flow measurement specified on the identification
sheet, piping and installation instructions must be followed carefully.
A) The pipe immediately up and down stream of the flow meter must be of
sufficient length, straight and free of obstructions. Refer to the piping
requirements chart for exact dimensions (Figure 3).
B) It is recommended that straightening vanes be used on all vortex meters,
but it is not necessary.
C) The schedule of the pipe being used must match the schedule of the
meter for at least 20 diameters upstream and 5 diameters downstream of
the flow meter.
D) When the vortex meter is being used as a controller, it is recommended
that any regulating valve be located downstream of the flow meter.
E) Weld beads on the internal wall of the pipe before or after the flow meter
should be ground flush with the pipe wall before the meter is installed.
F) Proper style and proper size gaskets should always be used when
installing the flow meter.
G) The meter body and signal processor may be rotated into any position
permitted by the pipe flanges. The flow meter has no moving
parts and is not position sensitive.
3.4 Temperature and Pressure Taps (Optional)
Installation of temperature and pressure transducers (if used) should be in
accordance with the manufacturer’s specifications.
A) The temperature transducer should be installed between 2.5 and 3.5
diameters from the downstream side of the wafer body. Consult the
factory for the exact dimensions, or refer to additional information at the
end of this manual.
B) The pressure transducer should be installed between 2.0 and 3.5
diameters from the upstream side of the wafer body. Consult the factory
for the exact dimensions, or refer to additional information at the end of
this manual (See Figure 4).