The most important element of the can is the valve. There are various valve designs. There is a spring situated inside the plastic pipe on most frequently used valves. When you press the spray nozzle, it is pressed down and the valve opens. Thanks to the pressure inside the can, the propellant-active ingredient mixture can now escape through the uptake pipe, valve and spray nozzle.
To ensure that the valve doesn’t get clogged after use, depending on the valve it may be necessary to spray the can upside down so that some of the propellant escapes thereby cleaning the valve. But be careful: This shouldn’t be done too often or with too much force, otherwise too much of the propellant will be lost.
In addition, there is also the ball valve that you can spray from any position – even upside down. This valve is primarily used for liquid active ingredients, like cleaners for instance. The pigments in the paint or metal sprays can make the ball stick inside, which stops the valve from working.
Another alternative to this is the self-cleaning VPH valve with gas-phase opening where both the media and the propellant are emitted simultaneously. This causes virtually no sticking or residue. Another general rule is: The complexity of the valve is reflected in the price.
We use a spray nozzle for our metal sprays that is tilted 10 degrees upward. This means that the spray emits at an angle of ten degrees upwards so that the can doesn’t also get sprayed.
Preis wieder.
Wir verwenden für unsere Metallsprays zudem einen Sprühkopf, der 10 Grad aufwärts geneigt ist. Das heißt, das Spray tritt in einem Winkel von zehn Grad nach oben aus, damit die Dose nicht mit angesprüht wird.