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Spray nozzles theory

Flow

The spray nozzle flows of different pressures, which increases with increasing spray pressure. Generally speaking, the relationship between flow and pressure as follows:

Density

Density of a certain volume of liquid of the same volume ratio of the mass of water. In the spray, the liquid (except water) Density principal effect the flow of the spray nozzle. The values ​​listed in the catalog are spraying water as drawn from the media, so when applied liquid other than water, shall apply a conversion factor to determine the nozzle flow.

Spray angle and coverage

Theoretical coverage is based on the spray angle and the distance from the nozzle orifice calculated. This value assumes that the spray from the spray angle remains constant throughout the premise derived. In actual spraying, the effective distance of the spray angle varies due to the spray. When the liquid viscosity than water, the formation of the spray angle is relatively small, the angle depends on the viscosity, the nozzle flow and spray pressure.

Values ​​in the table lists the different theories from the spray coverage of practical applications, the table does not apply within the spray angle distance spray. The direction of the force on its surface, it is the value per unit length of the surface tension. Main impact surface tension minimum operating pressure, jet angle and droplet size.

Spiral nozzles, industrial nozzles, nozzle, nozzle
Below lists the spray nozzle problems in the course of the seven most common reasons:

Wear: spray nozzle and the inner surface of the material flow path gradually shedding, thereby affecting the flow, pressure and spray pattern.

Corrosion: Because the spray solution or reference chemical environment of the nozzle material corrosion damage.

Obstruction: dirt or other impurities blocking the nozzle inside the mouth, thus limiting traffic and interference, spray shape.

Bonding: inside or outside the nozzle rim material, caused by the evaporation of liquid spray, fog or chemical condensation layer stacking interactions rather dry solidified layer, hindering the nozzle orifice or internal flow channel.

Temperature damage: caused by heat high temperature applications for non-designed nozzle material generates a harmful effect.

Faulty installation: When installing the axis deviation, over tighten or change the installation location, these problems can lead to the generation of leakage, and adversely affect spray performance.

Accidental injury: After installing and cleaning due to the incorrect application of tools and a nozzle causing unintended damage.

Thread size and diameter table

Pressure Unit: 1 bar = 1.02 kg / cm

Volume unit: 1 U.S. gallon = 3.785 liters

Linear Unit: 1 inch = 2.54 cm

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