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How to select the appropriate nozzle
May 09, 2017

There are many kinds of nozzles, the choice of the range is large, generally the nozzle degreasing and washing process, spray nozzle can choose strong impact: with "V" type fan type nozzle as an example, the spray angle in 60 degrees is the best, with the force of the impact is bigger; while the nozzle of phosphorus chemical order you can choose the good atomization, uniform and fine grain water centrifugal nozzle impact force is weak: the "Z" type is a conical nozzle as an example, the optimal distance from the nozzle workpiece is 40cm ~ 50cm, has dispersed, so that the spray effect of liquid atomization. Nozzle in the nozzle arrangement, can be used in parallel and cross two forms, the channel type, using a vertical cross arrangement, spray effect is better.

The factors of selecting nozzle are flow rate, pressure, spray angle, coverage, impact force, temperature, material and application. Flow and pressure, spray angle and coverage are proportional to the relationship. The purpose of any spray nozzle is to maintain continuous contact with the workpiece, the flow is more important than the pressure. The liquid temperature does not affect the spray performance of the nozzle, but it affects the viscosity and specific gravity, but also affects the choice of materials. The material of the nozzle should be determined according to the chemical characteristics of the bath liquid, and the non corrosive bath solution can be made according to the difficulty of processing. In order to prevent corrosion, can be used for non metallic materials; sulfuric acid, hydrochloric acid and other corrosive liquid tank, can be used for using nylon plastic; phosphating bath nozzle material general acid resistant stainless steel, to prevent corrosion of the nozzle can be directly made of stainless steel or nylon material.

The nozzle has a certain impact on the selection of small angle nozzle in the liquid column flow is the best; fan nozzle is suitable for cleaning, degreasing, cooling, suitable for bleaching cream, the conical nozzle surface, phosphating, humidification, dust and other aspects of the installation; Venturi mixing nozzle should be in the paint storage tank, cylinder, with "H" type stirring nozzle as an example, the bath after a certain pressure and lead by crossing the liquid sucking together with 1:4 mixed flow diffusion ejector, to solute mixing effect without air, thereby preventing precipitation, because the mixture of chemical solution stirring to ensure the uniform.

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