The Fog Engineers H.Ikeuchi & Co.,LTD

Spray Pattern, Spray Angle & Spray Distribution

Spray Pattern

The spray pattern means the cross sectional shape of spray. Selecting a suitable spray pattern for each application achieves the most efficient spray performance.
Spray pattern changes as the spray pressure is gradually increased from low to high.

直進ノズル(ストレートノズル)
Solid stream spray
扇形ノズル(フラットノズル)
Flat spray
空円錐ノズル(ホロコーンノズル)
Hollow cone spray
レーザー法による粒子径測定(フルコーンノズル)
Full cone spray
標準扇型ノズルのパターンの変化
ノズルパターンの変化

Spray Angle

The spray angle is the angle of spray near the nozzle.
As the spray flies through the air, droplets gradually lose momentum and the area it can cover decreases.
In actual spraying, the spray width varies with spray height. Take this into consideration when designing a nozzle layout.

Note that a pneumatic nozzle spraying a liquid with high velocity does not maintain its initial spray angle at the nozzle exit. Refer to value of spray width when designing a layout of pneumatic nozzles.

Spray Distribution

The spray distribution means the distribution of spray flow in the spray width direction.
A mountain-shaped distribution facilitates producing uniform spray distribution across the entire spray width by overlapping patterns in multiple-nozzle arrangements, while an even spray distribution is suitable for applications like cleaning that require uniform spray impact across the entire spray width.
Spray distribution varies depending on the spray height and pressure.

Mountain-shaped distribution
Even distribution
Ring-shaped distribution

Spray Capacity

Spray capacity vs. Liquid density

The spray capacity becomes larger as the liquid density becomes lower and the liquid pressure becomes higher.
The spray capacity is inversely proportional to the square root of liquid density. To determine the spray capacity of liquid having density (γ), multiply the spray capacity shown in our catalog or on website by conversion factor of .

Spray capacity vs. Pressure

The spray capacity increases and decreases proportionally to the square root of the pressure. To determine the spray capacity at a pressure (Px) not shown in the catalog tables, calculate the approximate spray capacity (Qx) by using the following equation.

  • P:Known pressure (select the value nearest to Px from the catalog table)
  • Px:Desired pressure
  • Q:Spray capacity at the pressure of P (see the catalog table)
  • Qx:Expected spray capacity (approximation)