What screen is recommended for wettable powders?

What screen is recommended for wettable powders?

• A. 50-mesh monel or stainless steel.
• B. 100-mesh nylon.
• C. 10-mesh brass.
• D. 60-mesh titanium.

Answer: (A)

Screening wettable powders is about removing lumps and oversized particles so the product suspends evenly and won’t clog sprayers. A 50-mesh screen provides a practical balance: its openings are small enough to catch clumps and coarse particles, which helps prevent nozzle plugging and uneven application, but not so small that the powder flows through too slowly during mixing. Using a screen made of corrosion- and wear-resistant metal, like monel or stainless steel, is important because wettable powders can be abrasive and may contain ingredients that can corrode softer metals or wear down screens quickly. Nylon screens can wear or shed fibers and may not hold up with some formulations or abrasives, while very coarse screens won’t remove enough oversized material and very fine screens can clog easily. So, a 50-mesh screen made of monel or stainless steel is the best choice for handling wettable powders effectively and durably.

Screening wettable powders is about removing lumps and oversized particles so the product suspends evenly and won’t clog sprayers. A 50-mesh screen provides a practical balance: its openings are small enough to catch clumps and coarse particles, which helps prevent nozzle plugging and uneven application, but not so small that the powder flows through too slowly during mixing.

Using a screen made of corrosion- and wear-resistant metal, like monel or stainless steel, is important because wettable powders can be abrasive and may contain ingredients that can corrode softer metals or wear down screens quickly. Nylon screens can wear or shed fibers and may not hold up with some formulations or abrasives, while very coarse screens won’t remove enough oversized material and very fine screens can clog easily.

So, a 50-mesh screen made of monel or stainless steel is the best choice for handling wettable powders effectively and durably.