The purpose of any nozzle is to maintain continuous contact between the bath and the workpiece

Because the nozzle is designed according to its work under a variety of different spray conditions, the nozzle suitable for the needs is selected in order to achieve the best spray performance in use. The characteristics of the nozzle are mainly reflected in the spray type of the nozzle, that is, the shape of the liquid when it leaves the nozzle port and its operating performance. The name of the nozzle is divided into fan shape, cone shape, liquid column flow (ie jet), air atomization, and flat nozzle according to the spray shape. The cone nozzle is divided into two categories: hollow cone and solid cone;

Factors for nozzle selection are flow, pressure, spray angle, coverage, impact force, temperature, material, application, etc., and these factors are often involved and restricted. Flow rate and pressure, spray angle and coverage are directly proportional. The spraying purpose of any nozzle is to maintain continuous contact between the bath and the workpiece. The factor of flow rate is more important than pressure. The temperature of the liquid does not affect the spray performance of the nozzle, but it affects the viscosity and specific gravity, as well as the choice of materials.

Choose the nozzle material

The material of the nozzle should also be determined according to the chemical characteristics of the bath liquid:

1. For non-corrosive bath liquid, bronze casting or plastic die casting can be used according to the difficulty of processing;

2. To prevent corrosion, non-metallic materials can be used;

3. Nylon plastic can be used for strong corrosive bath such as sulfuric acid and hydrochloric acid;

4. The material of the nozzle used for phosphating bath is generally acid-resistant stainless steel;

5. Nozzles to prevent corrosion can also be directly made of stainless steel or nylon.