Valve assembly for agricultural spraying, related apparatus, related systems, and related methods

A valve assembly for agricultural spraying, the valve assembly comprising:

• a top valve comprising:
• an air inlet, an air outlet, a top liquid inlet, and a top liquid outlet, wherein the top valve provides fluid communication therethrough in at least two states such that:
• (1) in a first state of the top valve, the air inlet is in fluid communication with the air outlet, and the top liquid inlet is in fluid communication with the top liquid outlet;
• and
• (2) in a second state of the top valve, the air inlet, the air outlet, and the top liquid inlet are in fluid communication with each other;
• a bottom valve comprising:
• a bottom liquid inlet, a bottom liquid outlet, a discharge outlet, and a drain outlet, wherein the bottom valve provides fluid communication therethrough in at least three states such that:
• (1) in a first state of the bottom valve, the bottom liquid inlet, the bottom liquid outlet, and the drain outlet are in fluid communication with each other;
• (2) in a second state of the bottom valve, the bottom liquid inlet is in fluid communication with the bottom liquid outlet;
• and
• (3) in a third state of the bottom valve, the bottom liquid inlet, the bottom liquid outlet, and the discharge outlet are in fluid communication with each other;
• and
• a fluid conduit in fluid communication with the top liquid outlet and the bottom liquid inlet, wherein the top valve and the bottom valve are in fluid communication via the fluid conduit;
• wherein:
• when the top valve is in the first state, the bottom valve is in the second state.