Selection of Strainer
The nozzle will choose different strainer according to the different situation,big particle diameter will choose the big strainer, if small will choose the small one,the strainer’s size is depended on the mesh number
Viscosity
When the liquid flow,it will occur the friction between the molecules,we call this character is stickiness,the size of stickiness Is viscosity , and it is used to characterize the resistance factor related to the properties of the liquid. The viscosity of the liquid is a major factor affecting the shape of the spray, it also has the effect to the flow rate. Compared to water,high viscosity liquid will need more high bottom limited pressure, and forming the more smaller spray angle.
Surface Tension
Changing the temperature ,it can’t change the spray character, but it will be affected by the viscosity,surface tension and specific gravity.
Temperature
The surface tension is the tension of the liquid surface layer acting on any boundary along the surface due to the unbalanced gravitational attraction of the molecular gravitational force. The nature of the surface tension is more pronounced at the low working pressure. The higher surface tension reduces the spray angle, especially for hollow cones and flat fan spray nozzles.
| Increase in Operating Pressure | Increase in Specific Gravity | Increase in Viscosity | Increase in Fluid Temperature | Increase in Surface Tension | |
| Pattern Quality | Improves | Negligible | Deteriorates | Improves | Negligible |
| Capacity | Increases | Decreases | * | ** | No Effect |
| Spray Angle | Increase Then Decreases | Negligible | Decreases | Increases | Decreases |
| Drop Size | Decreases | Negligible | Increases | Decreases | Increases |
| Velocity | Increases | Decreases | Decreases | Increases | Negligible |
| Impact | Increases | Negligible | Decreases | Increases | Negligible |
| Wear | Increases | Negligible | Decreases | ** | No Effect |
The spray flow rate is roughly proportional to the square root of the spray pressure under the same medium condition. The flow rate of any nozzle under a certain pressure can calculate the flow rate of any pressure. The known spray flow rate is Q1, and the corresponding pressure is F1. When the known pressure is F2, the unknown flow Qx has the relationship
Spray Nozzle Maintenance Tips
Clean Nozzles RegularlyAll nozzles have a specified spray pattern, distribution, and spray angle. If performance is not as expected, it could indicate that the nozzles are worn or plugged.
