Ecco Finishing

FAQ Low Pressure

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Pressure feed

Irregular spraying (spitting)
The fluid nozzle is not tighten or is damaged
The paint viscosity is too high
Starting to run out of paint
The paint has not a free passage: check the pump or the pressure feed tank, check the paint pressure regulator, check the filter, check the hoses.


Suction or gravity feed

The paint is spitting out from the spray gun, the flow of paint dust is varying:
Not enough paint in the paint cup
The paint container is tilted too much
The fluid passages are not open
The suction pipe is not tighten or is broken
The fluid nozzle is not tighten or is damaged
Too high paint viscosity
The small hole for air in the lid for the paint container is clogged or closed
The coupling nut at the paint inlet on the gun is not tight
The needle packing is not tight
The suction pipe is standing on the bottom of the paint container
The surface has a peel orange structure
To little atomizing air
Wrong distance between the spray gun and the object (200mm is correct)
The paint viscosity is too high
The paint is sedimented / is not enough blended
Wrong type of solvent is used – ask your paint supplier!
No or not correct pre-treatment of the surface


Stripes or cloudness in the spray pattern

Wrong distance between the spray gun and the object
Varying distance between the spray gun and the object during the painting cycle
The air cap is dirty
If the spray pattern is divided in the middle: increase the amount of paint or decrease the fan width
Not correct overlapping

Different types of incorrect spray pattern:

Narrowing down towards or upwards

The holes for the atomizing air are clogged
Dirt on the upper side of the fluid nozzle
Dirt on the seat of the fluid nozzle or air cap

Bended spray pattern to the left or right

The holes for atomizing air on the right or left side are clogged
Dirt on the left or right side of the fluid nozzle
On fluid nozzle with multi-nozzles the inner holes for atomization are clogged


Spray pattern is extended on the middle

Not enough of air for fan width control
Not enough atomizing air
Too high paint viscosity
Too big fluid nozzle


For pressure feed: the paint pressure is too high

The spray pattern narrow off in the middle
No balance between air- and paint pressure
Too high air pressure for fan width control
Too low paint flow / paint pressure