Badger Meter Positive Displacement - Manual (Page 11)

11
FLOW METER GUIDELINES
FOR PAINT OPERATIONS
DO: Leave flushing solvent in the lines overnight or during
extended off-times. This keeps internals wet, preventing
residual paint from drying and helping start ups.
DO: Follow the Maintenance Guide instructions when
opening and cleaning a meter. During cleaning,
separate the gears from the shafts. On carbide
bearings, clean inside the center of the gear bearing
and on the outer surface of the shafts at the point
where the gear rotates on the shaft. Apply a suitable
lubricating fluid before closing the meter. After
tightening the bolts, a short squirt of shop air will
briefly spin the gears which should be easily audible.
DO: Install and maintain filters. The recommended filter
should be installed to eliminate potential plugging.
Should plugging occur, the meter will still pass fluid
but with no signal output.
DO: Check electrical compatibility between the meter’s
output signal and the input of the PLC. If signals are
not being detected at start up, first check wiring and
electrical compatibility.
DO: Verify reliable grounding of electrical parts, as per
installation guidelines, and a dedicated power supply
is recommended. Voltage spikes on shared power
lines, negligent grounding and sloppy wiring will
likely produce erratic readings and chronic
maintenance. The control valve will provide back
pressure which is beneficial to stable flow control.
DO: Install the meter immediately upstream of the
regulator or control valve. The control valve provides
back pressure which stabilizes the flow.
DON’T: Allow air into the flow meter. Always keep the meter
internally wet.