Agrichemical spraying system

In combination with an aircraft, an apparatus for continuous formation and spraying of an invert emulsion from at least one water phase and at least one oil phase, wherein at least one of said phases contains an active agrochemical agent, which comprises:

• at least two concentric, vented, funnel-shaped tanks on one side of the aircraft;
• at least two similar funnel-shaped tanks on the other side of the aircraft;
• an outlet on the bottom of each tank;
• a cross-tube connecting each outlet to the outlet of the similar tank at the opposite side of the aircraft each pair of interconnected tanks holding one of said phase;
• a filling pipe connected to each cross-tube;
• one multifluid valve assembly for co-mingling said phases into a premix comprising:
• at least two inlets each leading to a channel controled by a common on-off gate formed by a plate sliding across said channels to completely close them,
• a separate metering gate across each said channel formed by a plate having a hole in its center, sliding across said channel to partially close it, and
• a common outlet area connected to all said channels;
• conduit means, for delivering each one of said phases to said valve assembly, branching off each cross-tube, each leading to one of the inlets of said valve assembly;
• a single low speed pump means;
• a mechanical stirring means for turning said premix into an invert emulsion comprising:
• a chamber having an inlet and an outlet, and a plurality of rotary agitators mounted within said chamber;
• at least one spray-forming means;
• conduit means for delivering said premix to said pump means and from said pump means to said mechanical stirring means;
• and
• conduit means for delivering said invert emulsion to said spray forming means.