What role do filters play in pneumatic systems?

Filters in pneumatic systems are essential for maintaining the integrity and efficiency of the system by preventing contamination of the air supply. Contaminants such as dust, dirt, moisture, and other particulates can adversely affect the performance of pneumatic components, leading to inefficiencies, equipment damage, and potential system failures. By removing these impurities, filters ensure that the air supplied to actuators and valves is clean, which helps prolong the life of the system and maintains optimal operation.

The other roles mentioned, such as increasing air pressure, regulating temperature, or providing lubrication, are not functions of filters. Increasing air pressure is primarily the role of compressors and pressure regulators. Temperature regulation may involve heat exchangers or other types of equipment designed for that purpose. Lubrication in pneumatic systems is achieved through lubricators, which add a fine mist of oil to the compressed air, ensuring smooth operation of moving parts. Thus, filters specifically focus on air cleanliness, making option B the correct answer.