System Performance Depends On Cleanliness

System cleanliness directly impacts performance across industries from aerospace to healthcare. Contamination—whether introduced during manufacturing, generated during operation, or caused by maintenance—can degrade efficiency, increase costs, and cause catastrophic failures. Common sources include debris, crystallization, wear particles, and environmental exposure. Even well-maintained systems face inevitable contamination risks over their lifecycle.

The Lee Company, with over 75 years of experience, outlines contamination types, signs of trouble, and the consequences of neglect. Early indicators include reduced pressure, sluggish actuator movement, leaks, or overheating due to sludge buildup. Examples include crystal growth inside hypo tubes restricting flow, and particulates preventing valves from sealing.

Prevention strategies focus on system filtration and last chance safety screens placed near critical components. While filters remove fine contaminants, safety screens provide targeted protection against larger rogue particles downstream of filters. Screen selection depends on component location, contaminant size, clearance tolerances, and system pressures. For clearances under 0.070 inches, secondary screening is recommended.

Screen performance can be compared by percent open area, indicating dirt-holding capacity for similar designs. For screens with differing geometries or hole sizes, The Lee Company developed the Resistance to Blockage (ROB) number, a standardized measure allowing designers to choose the most effective option for a given contamination profile.

By understanding contamination sources, applying targeted protection, and using tools like ROB numbers, engineers can safeguard system components, extend service life, and ensure consistent performance in critical applications. The Lee Company provides resources, technical support, and proven filtration solutions tailored to specific industry needs.