Pneumatic traps are devices used in various systems to separate liquids from gases. They utilize air pressure to create a barrier that prevents unwanted substances from passing through. This mechanism is commonly found in industrial processes, HVAC systems, and pneumatic conveying systems. These traps work by allowing gases to flow while capturing and holding liquids, ensuring efficient operation and preventing contamination. By maintaining the right pressure levels, pneumatic traps help protect equipment and improve overall system performance, making them essential in many applications where fluid management is crucial.