Billercay Air Bubble Jets
Billericay Air Bubble jets are now being used by many of our customers and our own contracting division to reduce drift and improve leaf contact. The following information has been taken from Billericays own sales literature
| How it works | Operating details | Lerap ratings | Application chart |
The revoltionary Air Bubble Jet - a new concept in spray technology
The Bubble Jets
draw air into the stream of liquid being sprayed, producing two
positive effects:
They reduce
the number of very small droplets - the ones that cause drift.
They create
air bubbles in the larger droplets which then collapse on contact
with the leaf and the liquid disperses evenly.
This overcomes the
problems of the conventional nozzle which forms both large and small
droplets - the large ones running off the leaf and the small ones drifting.
Air Bubble
Jets ensure that chemical contact with the leaf is improved and drift
is reduced
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The liquid being sprayed passes through a removable tapered nozzle A which accelerates the liquid and projects the flow into the tapered mouth of the venturi B. This creates a vacuum which causes air to be sucked in through two slots marked C. The mixture of air and liquid is compressed as it passes through the mixing chamber D and is then sprayed through a fan nozzle E
BCPC classes spray quality as Fine, Medium and Coarse. Jets which include air are not yet in this scheme. Tests with the ABJ indicate they are comparable to Medium/Coarse standard jets. |
Operating
details
The Air Bubble Jet
is precision made in five sizes - 015,02,03,04 and 05 - which cover
application rates from 37 to 430 litres per hectare.
Pressure should be
between 2.0 and 3.5 bar. The fan angle is about 100 degrees - this
varies slightly according to the operating pressure as the mixture of
air and liquid is compressable.
Air Bubble Jets
fit any standard nozzle body and can be used for both agricultural
spraying machines and knapsack sprayers. They are normally supplied
in packets of 10 and are coloured green, yellow, blue, red or brown
according to size.
LERAP
star ratings
The PSD have now
awarded the Billericay Air Bubble Jets with the following star ratings:
02 2 star
at 2.0 bar
03 3 star
at 2.0 bar
04 3 star
at 2.0 bar
05 3 star
at 2.0 bar
Under LERAP (Local Environment Risk Assessment for Pesticides) requirements, this type of nozzle enables users to reduce spray buffer zones to one metre when applying category B products, regardless of the size of watercourse or the application rate.
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