Unigreen Minibar, Ventagli, Super Spalliera, RV-GDC Batching Taps see Picture, Calibrated Plates CP

For instance, having a mistblower with fans and knowing:

-the working length L = 4,0 meters;

-the forward speed of 5,0 km/h;

-the tap lever in position 2;

-the pressure adjusted at 2,0 bars

you will have a flow rate value of 7,0 l/min. and consequently of 210 l/ha.

Similarly, by knowing the l/ha value to be sprayed, as well as the working speed and distance, we can obtain the lever position and the pressure which is necessary for treatment.

As the speed values indicated in the tables will hardly correspond to the real ones, at first it will be necessary to calibrate the speed by operating in the following way. With the equipment in average working conditions (half-filled tank), with power take-off at 500 r.p.m. and with the fan/s in operation (without spraying), drive a measured base of 100 meters, possibly on the field on which you have to work and measure the time (t) in seconds that you need to drive it.

Then calculate speed according to the formula:

V = S x 3,6 (1)

t

whereas S is the distance in meters (in our case, 100 meters) and t is the

time necessary to drive it.
Example:
if t = 66 seconds, you will have	V = 100 x 3,6 = 5,4 km/h
	66

It is recommended to repeat the calibration with 2-3 different gears in order to have more data relating to speed.

As - beyond forward speed - also working width may not correspond to the ones indicated on the table, by using the flow rate in l/min. of the spraying head (see last line of table No. 3), you may obtain the volume in l/ha according to the following formula (2):

VOLUME in l/Ha. =	600 x l/min.	(2)
	working width (m) x working speed (km/h)

Therefore, if from the initial example only working speed is different from V =

5,4 km/h, you will have:

volume in l/ha = 600 x 7		= 194 l/ha
	4 x 5,4

If also working width is different, for instance 3,5 m:

volume in l/ha =	600 x 7	= 222 l/ha
	3,5 x 5,4

6.4.1BATCHING TAPS (SEE PICTURE 20)

On the equipment VENTAGLI (FANS) there are two batching taps which can be used to quickly change the flow rate to the jets; the long part of the lever shows the position (f.i. picture 20 = pos. 4). Each tap can carry out four different positions. In the range of each single mode, for four different pressures set on the regulator, we obtain four different values of the litre capacity per minute, for a total of 16 values as you can observe from table pages 25-26. An increase in pressure means an increase in capacity; a decrease in pressure means a decrease in capacity. For other types of heads, the number of positions and the pressure value can be different, as you can notice on the relevant tables.

6.4.2 CALIBRATED PLATES CP

In the accessories provided with an anti-dripping valve on each sprayer, on the valve output there is a calibration plate which guarantees an homogeneous distribution among the various sprayers.

According to the spraying table to be carried out, it is necessary to install the plate indicated in the table.

NOTE: The plate must be mounted with the side bearing the initials towards the liquid output (picture 21).

The values indicated on the tables are approximate; according to the mixture concentration, spraying values can be slightly different. These differences can be easily corrected by acting on the working pressure. Increasing pressure means increasing spraying and vice versa.

N.B. to calculate the different ranges it is sufficient to multiply the value lt/hectare by the corresponding width indicated in the table and divide it by the new width.

Example-

In the table: 907lt/ha with row distance 3m.

907x3 = 971 Lt/ha with row distance 2,8m

2,8

FIG. 20

posiz.	Ømm	Ø inch
1	Ø1,75	Ø0,07"
2	Ø2,25	Ø0,09"
3	Ø3,50	Ø0,14"
4	Ø4,25	Ø0,17"

FIG. 21

ANTIDRIPPING VALVE

MARKED SIDE

GASKET	CALIBRATED PLATE
	4916-47
	4916-51
	4916-55	unigreen 21
	4916-70