What condition must pneumatic instruments and processes avoid regarding compressed air?

Pneumatic instruments and processes must avoid wet, hot compressed air because moisture in the air can lead to several issues that negatively affect instrument and system performance. The presence of water in compressed air can cause corrosion of pipes and components, which can lead to leaks and system failures. Moisture can also lead to freezing in cold environments, which can block lines and affect instrument accuracy. Additionally, water can cause filters and regulators to clog more quickly, requiring more frequent maintenance.

Ensuring that the compressed air is dry and at an appropriate temperature helps maintain system reliability, accuracy, and longevity, as it reduces the risk of condensation and other moisture-related problems. This is why maintaining a condition of dry air, whether at cold or warm temperatures, is crucial for the proper functioning of pneumatic systems.