Troubleshooting – Output of Powder Insufficient to Coat Parts

Problem,Cause and Remedy

PROBLEMCAUSEREMEDY
Poor fluidizing properties in the powder hopperPressure of fluidizing air too lowAdjust (increase) pressure of fluidizing air
Fluidizing membrane is blockedClean or replace the fluidizing membrane: see instructions of equipment supplier.
Humidity of compressed air too highInstall an air dryer with a corresponding oil-micro filter or another suitable drying system.
Humidity of the powder too highCheck storage facilities.
Powder shall be stocked at room temperature in closed packing (maximum humidity 75%)
Free-flowing properties of the powder are badContact your powder supplier
Blockage in venturis and hosesFusing of the powder in the venturi. Clean or replace the venturi (see instructions of the equipment supplier). If necessary, reduce pressure of powder of transport air
Fusing of the powder in the hosesClean the hose by bending and breaking up the fused powder; if necessary replace it.
Fusing of the powder in the hosesInstall an air dryer with a corresponding oil micro filter or an air dryer with a corresponding oil micro filter or another suitable drying system.
Bad free flowing properties of the powder. Contact your powder supplier.
Blockage in the gunFusing in the gun or gun outlet.Clean the gun according to the instructions of your equipment supplier. When blocking occurs, frequently check humidity of compressed air and the free-flowing properties of the powder.
Blockage caused by contamination of the powder with dust of other coarse materials. Clean the gun according to the instructions of equipment supplier and determine the reason of this contamination. (Check powder pumps for possible impact fusion. Impact fusion particles which break off in the pump could be transported to the spray gun and result in blockage.)
Troubleshooting - Output of powder insufficient to coat parts