10
NOTE: During line shutdowns such as overnight and over weekends, flush and leave meters filled
with proper cleaning fluid under pressure to allow any residue that may have built up to soak and
dissolve.
End of Shift and Overnight Preparations
At the end of a shift or overnight, leave cleaning fluid in the flow meter under
pressure, to soak. This helps keep unflushed residual fluids from drying, and
facilitates subsequent startups. Opening a flow meter after a flush cycle helps
determine if the purge is thoroughly cleaning the flow meter.
Breakdown
NOTE:
Full breakdown instructions are included in the Maintenance Guide.
NOTE: If you remove a flow meter from the line during maintenance, do not allow fluids to dry
inside. Clean the internals immediately, lubricate them, and cap the fluid ports.
NOTE: Clean the carbide surfaces at the point where the gear rotates on the shaft. Buildup here
may occur as a thin smear and may be difficult to see, but causes friction and accelerate additional
buildup later when the gears are reinstalled. Spin the gears by hand to verify that they rotate freely
on the shaft and apply a suitable lubrication fluid before closing the flow meter. After tightening the
bolts, a short squirt of shop air will briefly spin the gears, which should be easily audible.
CAUTION: Do not overspin gears if using shop air to verify free rotation of
gears prior to installation.
CAUTION: Do not use wrenches or a Channellock to aid in re-installing the
pickup sensor by hand. Whether you are installing the sensor with a tool or by
hand, tighten to hand-tighten torque only.
Plugging
In the event of plugging, the flow meter passes a reduced volume of fluid with an
increased backpressure and no frequency output. Careful installation is important
because this is the time when contaminants such as tape or metal shavings can
enter the flow meter. Filters should be in line to prevent oversized particles from
entering the flow meter.
In the event the flow meter needs to be returned to the factory for further
evaluation, flush the flow meter in place and cap the ports. Pack carefully (with
original packing materials, if possible) prior to shipping to prevent damage.
Filtration
Filtration is recommended to prevent contaminants from entering the flow meter.
If the flow meter is plugged, a reduced flow can still be observed from the nozzle
or outlet, as fluid pressure squeezes fluid through the flow meter. Should this
occur, review the cleaning and maintenance procedures in the following sections.
Summary of Contents for FPD-4000 Series
Page 26: ......
