Why choose Cima?

Cima sprayers have been designed and built inside the Cima factory in Italy since 1974. Cima sprayers are perfect for vineyard, orchard, and nursery spraying. These sprayers allow for more acres per fill-up, uniform spray, more coverage, and better control of air distribution. They also allow for less chemical run-off, fewer applications, fewer fill-ups, and less maintenance.

“High Volume” system

Why Cima? 12

The “traditional” sprayers use a diaphragm or piston pump to obtain a high water pressure to distribute the chemicals through one or more small diameter outlet/s. The use of a fan permits to “hold up” the water droplets by assisting the distribution of the chemicals over the vegetation. This system is conventionally called “High Volume”.

 

 

 

“High Volume” system

“Low Volume” sprayer

Why Cima? 13The CIMA pneumatic sprayers use a system based on the “Venturi tube”; a centrifugal fan generates an intense airflow that passes through the Venturi tube and exits through an adequate throat. The water is introduced, without pressure, into the throat of the Venturi and is sheared into extremely fine and uniform particles. The application of this principle is the essential and binding condition for the construction of pneumatic sprayers.

 

 

 

 

The system based on the “Venturi Tube” principle

Let’s compare the 2 methods!

Why Cima? 14

With the “High Volume”, 85% of the droplets have a diameter of 300 / 500 microns. This size cannot be reduced, not even increasing the working pressure.

The distribution results in rough and uneven, therefore LESS EFFICACY.

 

 

 

 

“High Volume” system

Why Cima? 15

With the pneumatic Low Volume CIMA Venturi Air sprayers, the distribution generates a water fog with a smaller diameter for the 90% of droplets (usually 100 / 150 microns).

The distribution results in precise and uniform, therefore MORE EFFICACY.

 

 

 

 

The system based on the “Venturi tube” principle

The difference in particle size is extremely important. An equal volume of the water used, it allows the pneumatic sprayers to do a distribution significantly larger than the “traditional” sprayers. In other words, CIMA pneumatic sprayers cover the same area of vegetation treated by the “high volume” sprayers but with much less water used, that is with a “low volume” of water.

Why Cima? 16

Imagine to cover a given area with water droplets: it is obvious that smaller droplets will cover a bigger surface inside the given area.

From the volume of a 300 microns droplet, we obtain 27 droplets of 100 microns. Even considering that the droplet diameter is the same as its imprint, the covered area moves from 0,07 mm² to 0,21 mm², tripling.

Droplets coverage on an area
Why Cima? 17

However, if we consider the droplets flattening and the larger efficacy area of action coming from the volatility phenomena of the chemicals, and therefore the diffusion and saturation of the peripheral layer (the so-called “Fleming halo” whose thickness is estimated in about 100 microns), the covered area moves from 0.196 mm² to about 1.91 mm², that means 10 times of increase roughly.

Why Cima? 18 

Furthermore, it is important to consider the droplets’ dynamic behavior. Due to the surface tension and to the bigger volume, the bigger droplets (more than 400 microns) have less adhesion and cause losses because of the great accumulation, of the deposit uneven, of the runoff onto the leaves, and of the dripping onto the ground.

 

Droplets too small (less than 70 microns) are very sensitive to the wind, the high temperature might cause their evaporation making them very small or even drying the solute chemical particle.

On the contrary, the 100 / 200 microns droplets have better distribution and, carried by the air spray, penetrate into the vegetable interstices and create a more uniform coverage without dripping.

Regardless of the type of sprayer used, the quantity of chemicals to distribute per hectare remains unchanged, based on the crop to treat.

Why Cima? 19

Why Cima? 20Why Cima? 21Why Cima? 22