Flowserve Circulator - Manual (Page 5)

5
5 Troubleshooting
Problem Probable Cause
Unable to maintain Pressure Low pressure control valve setting: Follow the procedure in this document to
(Low Pressure) adjust the valve as required.
Low pressure relief vale setting: Fluid is bypassing the through the valve and
returning to the tank. Follow the procedure in this document to adjust the
valve as required.
Unable to maintain Pressure High pressure control valve setting: Follow the procedure in this document to
(High Pressure) adjust the valve as required.
Low Temperature/High Viscosity: Low temperature can cause the barrier fluid
to have a too high of viscosity, creating high pressure loss on the seal supply
and return lines. Insulate line to maintain temperature.
Poor supply and return line piping: The supply and return line piping should be
sized and constructed to eliminate as much pressure loss as practical.
Unable to maintain Flow Low pressure relief vale setting: Follow the procedure in this document to adjust
the valve as required.
Worn Pump: If the circulator pump wears the discharge flow rate will decrease.
This will be more apparent at higher pressures. Measure the flow rate at normal
operating pressure and again at 1/2 normal operating pressure. If the
flow increases more than 20% then the pump may need to be replaced.
Note: pump wear can be accelerated by poor quality barrier fluid and/or failure
to maintain system filtration, and prevent ingression.