PMC PH Series - Page 36

PH-20/PHX-20 Manual
36
7. Pressure Loss: Discharge/Inlet Ball
Simultaneous observation of the material Pressure Gauge [H, K, page 9] and Direction
Indicator Light [Z page 12] is necessary to determine which direction the Metering
Pump fails to maintain pressure. Refer to the chart to determine problem:
Directional Indicator Light
ON
Directional Indicator Light
ON
Iso Pressure Gauge
FALLS
Iso Inlet Ball does not seat
properly
Iso Discharge Ball does not
seat properly
Poly Pressure Gauge
FALLS
Poly Discharge Ball does
not seat properly
Poly Inlet Ball does not
seat properly
In most cases the cause of a leaking Inlet/Discharge Ball is foreign material preventing the
Ball from seating properly. If the above steps do not resolve the problem, replace the
appropriate Ball, Ball Seat.
For service see MAINTENANCE/Metering Pump Line/page 44.