Flowline LU84-5161 EchoSpan - Manual (Page 20)

20 of 22 EchoSpan 31 MAR 11
MN301550 Rev B
5. Stand Pipe: A standpipe maybe used to dampen turbulence or when foam is present in the
application.
a. Pipe can be made of any material.
b. Select a minimum 3” ID pipe for the stand pipe.
i. A 2” pipe is usable with the LU80 series, but is the minimum.
ii. Pipes larger than 3” can also be used.
c. Use a coupling and reducer bushing to attach the EchoSpan to the pipe.
i. With the LU80 series, be sure to use a plastic reducing bushing such as LM52-
1400 2” T x 1” T fitting or the LM52-1410 2” S x 1” T fitting.
d. The pipe length should run the measurement span and the bottom of the pipe should
remain submerged at all times to prevent foam from entering the pipe.
e. Cut a 45°notch at the bottom of the pipe and drill a 1/4”pressure equalization hole in
the dead band.
f. The pumps should not drive liquid past the open end of the stand pipe which causes
the liquid in the pipe to oscillate.