Powder pump control critical.(Powder Coating)(Brief Article)

My operators seem to spray more powder than necessary and complain about "puffing." What role does the pump perform in the powder process and how can I avoid the "puffing"?

Control of the powder delivery is critical to the performance of the application. Charging efficiency and applied film thickness uniformity are dependent upon consistent powder delivery. Many users do not understand the importance of powder pump control and how it "affects a powder coating operation.

A pump is used to get powder to the spray gun. This pump, called a venturi, or injector pump, is designed to pneumatically convey the powder material from the fluidized feed hopper to the …