FACTORS THAT AFFECT TRANSFER EFFICIENCY Of all the strategies available for reducing pollution (air, water and waste) and costs from a paint facility, transfer efficiency probably provides the most benefits. Several factors affect transfer efficiency to a smaller or greater extent. These include: Part size Part geometry Gun-target distance Coating viscosity Ease with which coating can be atomized Spray gun design and method of atomization Fluid pressure Atomizing air pressure Fan size Overlapping of successive spray gun strokes Orifice diameter of spray gun cap Air velocity in the spray booth Air balance in the spray booth Painter=s technique in applying the coating Lead and lag triggering times Conveyor line speed Speed of spray gun travel Painter fatigue Lighting in the spray booth Space constraints on the spray booth Attitude of management Attitude of the painter
For electrostatic guns additional parameters include: Coating conductivity (or resistivity) Grounding of the parts Voltage potential between electrode and ground Proximity of other grounded objects to gun
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