The nozzle diameter of the spray gun is one of the key factors that determines the spraying effect. Different nozzle diameters will directly affect the atomization, spray uniformity and coverage ability of the paint. The following is the specific impact of nozzle diameter on spraying results.

1. Atomization effect
The smaller the diameter of the nozzle, the finer the paint will be atomized when sprayed, resulting in a more uniform coating. Fine atomized particles can better adhere to the surface and reduce sagging and dripping. This characteristic makes the small diameter nozzle ideal for detailed spray work such as automotive painting, furniture painting or artistic creation. In contrast, large-diameter nozzles produce larger particles and are suitable for spraying on rougher surfaces, such as coatings on industrial equipment.

2. Spray thickness
Larger nozzle diameters are generally suitable where thicker coatings need to be sprayed. The larger diameter increases flow, allowing the paint to cover a larger area in a shorter time, which is especially important when applying base or protective coatings. For construction workers, using large nozzles can significantly improve work efficiency, especially in large-area flat painting tasks.

3. Spraying speed
Nozzle diameter also affects the speed of spraying. Small diameter nozzles require higher air pressure and slower movement speeds to ensure even coating distribution. When using small nozzles, operators need to maintain a stable spraying speed to ensure that every area can be covered evenly; while large-diameter nozzles allow faster spraying speeds and are suitable for large-area spraying operations. In some cases, using large nozzles for rapid spraying can reduce overall construction time and increase production efficiency.

4. Paint type
Different types of paint are also suitable for different diameter nozzles. Paints with higher consistency (such as paints and some glues) usually require a larger nozzle diameter to ensure that the paint can pass through the nozzle smoothly and spray out; while water-based paints can use a smaller nozzle diameter to achieve more detailed spraying . In addition, special coatings, such as metallic paints or special effect coatings, may have more stringent requirements for nozzle selection to ensure a uniform and beautiful final effect.

5. Final effect
The final spraying effect not only depends on the nozzle diameter, but also is affected by many factors such as operating technique, spraying angle, air pressure and paint viscosity. Choosing the appropriate nozzle diameter is the basis for achieving ideal spraying results, but it also needs to be adjusted according to specific conditions. For example, for complex shapes or edges, the operator may need to change the spray angle and technique to ensure that each part is coated evenly.