Bell VFM60 Series User Introduction Manual page 8

Pressure
sensor:2~7D
downstream of
flowmeter
Temperature
sensor: 1~2D
downstream of
pressure sensor
Roots blower or
piston blower or air
compressor in
upstream
After a piston pump
T type pipeline in
upstream
Date:24/04/2020
Roots blower or piston blower or air compressor or pump in upstream, could
cause vibration of the fluid itself. To eliminate this vibration, please install a
orifice plate or a upsized pipe at about 25D upstream the meter. The valve
should be located downstream the flowmeter in this condition
Please install a accumulator to reduce the vibration
When upstream pipe line is T typethe flowmeter and a valve downstream the
meter is shut (see above picture), the fluid will all flow towards direct B, but
the meter may still have reading for it may be detecting the pulsating
pressure. Please move the valve to upstream of the meter to avoid this
situition
8 / 59
VFM-60
Vortex Flowmeter
Rev1.3
User's Manual