Cause nozzle failure reasons:

1, erosion. When the high velocity of the liquid through the nozzle hole of the metal surface, it will generate the nozzle hole erosion, resulting in lower nozzle pressure, the spray state becomes erratic. The probability depends on the nozzle erosion hardness of the liquid, spray pressure, the use of chemical types and amount of materials. In addition, particulate impurities in the liquid will be severely eroded nozzles.
2, accidental damage. Improper use and maintenance can not be accidental damage leading to the main nozzle. Although the nozzle opening is usually designed in a concave type, but the fan nozzle biasing structure is very susceptible to damage.
3, corrosion. Spraying the workpiece using the chemicals, these chemicals also cause corrosion of the material nozzle.
4 blocked. Chemical materials and impurities inside or outside edge of the nozzle will cause the accumulation of blocking the nozzle. This will affect the shape of the spray nozzle, thus affecting the spray pressure.
5, the temperature. Long nozzle at high temperatures or abnormal, can cause damage to the nozzle due to material softening.

Nozzle problem identification:
    Spray pump according to their nominal capacity, the nozzle pressure spray nozzle with the expansion of diameter reduction. The nozzle is damaged, even if the actual flow of the nozzle exceeds 30% of its rated flow rate, it is difficult to change the atomization state identified with the naked eye.
    The best way to identify the nozzle spray pipe is to observe changes in the pressure. In the same pre-treatment system when comparing different nozzles, the position and accuracy of the gauge is crucial. Usually spray tube pressure gauge should be placed in the front end. Determination spray pipe pressure change on the road, should be good reference pressure spray nozzles, through the actual pressure and the pressure difference between the reference nozzle determine if there are problems.

Nozzle problems exclusion:
    Because it is difficult to perceive with the naked eye directly nozzle problem, so we must first pay attention nozzle selection. After choosing the proper nozzle, but also a complete set of maintenance and replacement program.
    1, regular inspection nozzles. Including regular cleaning nozzles and nozzle regularly check whether the appearance of damage. Average pre-treatment production line before several processes (such as pre-skimmed, skimmed) class nozzle inspection and cleaning should be carried out, followed by spray process inspection and cleaning frequency can be appropriate Director.
    2, regular replacement nozzles. Nozzle replacement frequency depends on the environment in which the composition and nozzle spray liquid material. If the temperature is higher, the spray solution containing impurities, the number of the nozzle relatively frequent replacement.