What problem does a check valve screen prevent?

What problem does a check valve screen prevent?

• A. Nozzle dribble when boom is shut off.
• B. Unwanted spray drift.
• C. Clogging of the line.
• D. Chemical instability.

Answer: (A)

A check valve works to let spray fluid flow in one direction only, and the screen helps keep debris out so the valve can seal properly. When the boom is shut off, there’s still pressure in the lines, and without a valve to stop it, liquid can be pushed back and out through the nozzles, causing dribble. The check valve blocks that backflow, so the nozzles stop spraying as soon as you shut the boom. The screen component is there to prevent debris from clogging or sticking the valve, ensuring it closes cleanly and maintains that one-way flow. Drift, line clogging, and chemical stability aren’t directly addressed by this mechanism—for drift you’d look at nozzle design and application rate, for line clogging you’d rely on filters and maintenance, and chemical stability relates to formulations and storage rather than valve function.

A check valve works to let spray fluid flow in one direction only, and the screen helps keep debris out so the valve can seal properly. When the boom is shut off, there’s still pressure in the lines, and without a valve to stop it, liquid can be pushed back and out through the nozzles, causing dribble. The check valve blocks that backflow, so the nozzles stop spraying as soon as you shut the boom. The screen component is there to prevent debris from clogging or sticking the valve, ensuring it closes cleanly and maintains that one-way flow. Drift, line clogging, and chemical stability aren’t directly addressed by this mechanism—for drift you’d look at nozzle design and application rate, for line clogging you’d rely on filters and maintenance, and chemical stability relates to formulations and storage rather than valve function.