Gambetti sprayers

Based in Italy, Gambetti Barre has been building sprayers for years — and it shows. These are strong units with some excellent features, yet they remain simple and easy to use. You can actually see how they work.
The company offers sprayers with tanks from 200-litre capacity to a massive 5,000-litre self-propelled machine. Appropriate to amenity use, we look at the 300-litre tractor-mounted unit and a 350-litre de-mount sprayer fitted to a John Deere Gator. The latter has the advantage that it is very easy to drive so the operator can stay focused on the spraying process. We have no trouble linking the tractor-mounted model to a John Deere tractor, and within minutes we are ready for work.
Gambetti sprayers share many common components. For instance, both have an induction hopper for adding the chemical so there is no need to lift the chemical container up high to empty into the tank. And there is a rinse unit so the container can be emptied, turned upside down and automatically cleaned.
A really nice touch is the clear lid on the hopper so you can see when the chemical has gone. Jets ensure that thick liquids and powders are mixed before they enter the main spraying tank. Other features, such as the clean water tank and clothing locker, are conveniently located.
Showing the ingenuity of this company’s design team, the polyethylene spray tanks on Gambetti sprayers are fitted with a deep sump in the bottom, and the water filter and pump are below the tank so the mechanism is gravity fed all the time. This means that the water should always reach the pump, even when the unit is driven over undulations, and you shouldn’t get caught out sucking air and under applying the chemical. The tank has a rinsing facility so you can spray it out on the work site rather than mess about with hoses back at the yard.
The pump itself is impressive. It is sealed so there is no greasing to worry about. At 100 litres per minute this diaphragm pump gives spraying capabilities from 100 litre/ha to 1,500 litre/ha. It’s all-steel, sealed and very strong, but also well protected. All filters are accessible for cleaning. All necessary features, like clean water tank and locker, come as standard on these sprayers.
The back of each sprayer is simple and uncluttered. It’s also well protected for those occasions when you need to reverse. The 6m boom, with steel lines, is opened by removing a pin and swinging the sections out and round to lock into position. Defenders come down to protect the two end jets. Turning a quadrijet holder to a mid-position puts that nozzle out of use so a 10m boom can be used to apply over, for example, a 4m width.
We find the Gambetti sprayers beautifully simple to fill and use. During the test the application is low drift. Wheeled shrouded booms that are designed to follow ground contours and minimise drift are available. Other options include foam makers and hydraulic folding, rather than manual lift, booms.

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