Unigreen Ventagli Spraying Description of the Diffusers, NON-DRIP Valve, Mistblower Calibration

R V FIG. 18

FIG. 19

20unigreen

6SPRAYING

WARNING: the indications to follow when using chemical products are indicated in paragraph 2.2.1.

6.1DESCRIPTION OF THE DIFFUSERS

The distributor accessories of the AIRDROP range are equipped with variable diffusers (FIG. 18) that let you direct the airflow (and as a consequence the treatment) on the vegetation to treat, adapting to your various needs.

According to the configuration of the accessory the diffusers have outlet mouths with different shapes and sections, furthermore they are equipped with a tap for turning the liquid on/off (R) so you can independently close one or more diffusers in the case of scarce vegetation.

In the VENTAGLI version the diffuser is the fan itself.

6.1.1 NON-DRIP VALVE

There is a non-drip valve (V) on the distributors (FIG. 18) that limits and/stops the mix dripping when the supply tap is closed. In any case we recommend closing the delivery of the mix a few seconds before disconnecting the power takeoff.

In versions with fans the valve is mounted immediately upstream of the dosing taps (see paragraph 6.4.1)

6.2DESCRIPTION OF THE MFC® NOZZLES

The Unigreen low-volume pneumatic atomization system uses MFC® nozzles (FIG. 19) consisting of a steel wire supported by Nylon deflector vanes that also act as collectors for the liquid. The high-speed action of the air atomises the film of liquid on the wire; in this there is a high air/water surface area in contact and not just a single atomisation point, which means a big advantage in terms of uniformity and homogeneity of the jet.

6.3MIXTURE CONCENTRATION

As you may know, the pneumatic equipment are used for more or less concentrated treatments. To prepare the mixture, it is necessary to follow the instructions on the chemical product label. As a general rule, the product quantity to be sprayed on the hectare is the same as normal-volume treatments (a 20%-reduction is also possible); the water volume is reduced a lot even up to 9 times = 10 concentrations.

We will try to clear this concept as regards concentration with an example for the correct use both of equipment and products.

Imagine that in order to protect a normal-volume culture hectare you use 15 ml. of mixture. If the product dose recommended by the expert amounts to 100 g/hl. (normal-volume dose indicated on the label which is always to be followed), for 15 hl. You will use 1,5 kg. of prod- ucts. If you decide to reduce the water quantity per hectare at 500-300-150 litres (that is to say concentrating 3-5-10 times), in these new water

volumes we must always use 1,5 kg. of product and 1,2 kg. if necessary (for reductions up to 20%). As a consequence, the mixture concentration can vary according to the water quantity that you wish to use.

From this example, you can notice a reduction of 4 fillings and 12 ml. of water.

5MISTBLOWER CALIBRATION

The tables on pages 25 to 28 make it possible to determine the delivery in litres/hectares of the various equipment having the following initial data:

-position of the batching tap levers (Ventagli - Fans)

-calibrated plate CP (all others diffusors)

-used pressure;

-working speed (in km/h);

-working length (in meters).