Arable
How does it work?
(We will look at one example, but it may vary slightly between manufacturers.)
In Spray On mode:
• The water/chemical mix is drawn from the tank through the suction filter to the pump. • Under pressure from the pump (RED hose) any excess volume is returned back into the suction side of the pump via the Ramsay pressure regulator. • Spray mix then goes through the flow meter (rate controller) and pressure filter. • The spray mix then splits via a ‘T’ in the plumbing. One feed is a constant feed to the boom spray line ends. The other feed goes to the MASTER valve. • When spraying, the MASTER valve port is also open to the pressure feed from the ‘T’. This is then fed to the centre part of the spray line, giving three feeds to the spray line, eliminating any pressure drop to the outer nozzles on a single feed spray line at high volume. • Air stop nozzle bodies are used to turn the spray on.
In Spray Off/Circulating/Prime/Purge mode:
When the Spray mode is turned off, two things happen:
• The air stop nozzles close. • The MASTER valve turns into the return position.
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