DENSE PHASE PUMP DIAGNOSTICS

摘要

A diagnostic apparatus for a powder coating material pump includes a detector that uses pressure or flow to detect a fault in the pump, the diagnostic apparatus being external the pump, internal the pump or a combination of external and internal the pump. Another diagnostic device is provided for a powder coating material pump, and includes a light source in close proximity to the pump, the light source having an on condition and an off condition wherein one or both of the on condition and off condition provides information about the pump performance. An exemplary pump is a dense phase powder coating material pump.

主权项

1. A diagnostic apparatus for a pump, the diagnostic apparatus comprising:
the pump comprising a pinch valve and an air permeable member that forms a pump chamber, wherein suction air flow out of said pump chamber through said air permeable member pulls power coating material into said pump chamber and delivery air flow into said pump chamber through said air permeable member pushes powder coating material out of said pump chamber, to produce a powder coating material flow from an inlet port to an outlet port along a powder flow path through said pinch valve, a diagnostic device comprising at least one detector to detect a characteristic of said air flow, and a logic device configured to control operation of said pinch valve to open and close, and to control said suction air flow and said delivery air flow.