The nozzle
To obtain an effective application, the distribution regularity of spreaded volume is very important.
This regularity is based on :
- the operating pressure
- the boom working height
The nozzle plays a major role to determinate the flow, the distribution and the droplets size : "split the chemical into droplets in sufficient quantity and quality". This is called "the coverage".
The density of droplets required must be chosen according to drift risks. Nozzles can be classified according to droplets size.
From the smallest to the biggest droplets.
- Flat fan nozzle AFX - RFX
- Flat fan drift control nozzle with air injection (low pressure) ADX - RDX - ATX
- Flat fan drift control nozzle with air injection (high pressure) ARX - RRX
- Nozzles for liquid fertilizer applications TRIFILET - R5X
The ISO colour code (ISO) and the use of PENTAJET nozzle holder make choice of nozzles easier.
Coverage concept
The coverage concept is defined at the microscopic scale.
Nomber of droplets per cm² |
Type of operating |
Between 20 to 30 |
Systemic insecticide |
Between 30 to 40 |
Contact or ingestion insecticide |
Between 20 to 30 |
Pre-emergence herbicide |
Between 30 to 40 |
Systemic post-emergence herbicide |
Between 30 to 40 |
Penetrating post-emergence herbicide |
Between 50 to 70 |
Contact herbicide |
Between 50 to 70 |
Herbicide with effect on leafs and roots |
Between 30 to 40 |
Systemic or combination fungicide |
Between 50 to 70 |
Contact fungicide |
Drift concept
The droplets size determines the coverage, the retention and the drift.
The term of "drift" is used to define the part of chemical which is taken out of its original target.
The amount of drift may have several origins :
- Atmospheric drift : wind effects, temperature effects, hygrometry effects
- Ground drift : streaming effects on vegetation
To battle with the drift, we advise you to have nozzles with different technologies such as air injection.