What is a common drawback of Wettable Powders (WP) in spray equipment?

What is a common drawback of Wettable Powders (WP) in spray equipment?

• A. They wear out pumps and nozzles
• B. They evaporate quickly
• C. They resist drift
• D. They are always safe for equipment

Answer: (A)

Wettable powders are dry formulations that must be wetted and kept in suspension for spraying. The main drawback in spray equipment is their abrasive nature: the solid particles repeatedly grind against moving parts, which wears pumps, seals, diaphragms, and nozzle orifices. That wear can shorten equipment life, change spray patterns, and require more frequent maintenance. In addition, the powders can clog screens and filters if not properly filtered and agitated, so equipment performance can degrade over time. Evaporation doesn’t apply to WP because they are solids that dissolve or disperse rather than evaporate. Drift isn’t a built-in advantage of WP; while drift depends on many factors, WP can contribute to wear and handling challenges, not to reduced drift. And they are not inherently safe for equipment.

Wettable powders are dry formulations that must be wetted and kept in suspension for spraying. The main drawback in spray equipment is their abrasive nature: the solid particles repeatedly grind against moving parts, which wears pumps, seals, diaphragms, and nozzle orifices. That wear can shorten equipment life, change spray patterns, and require more frequent maintenance. In addition, the powders can clog screens and filters if not properly filtered and agitated, so equipment performance can degrade over time. Evaporation doesn’t apply to WP because they are solids that dissolve or disperse rather than evaporate. Drift isn’t a built-in advantage of WP; while drift depends on many factors, WP can contribute to wear and handling challenges, not to reduced drift. And they are not inherently safe for equipment.