Environmental engineering stands as a crucial task in the 21st century, with its primary aim being the control and treatment of various environmental pollution sources, minimizing their impact on the environment.

In practical environmental engineering, valves are often employed in process pipelines to achieve full open or full close control of fluid within the pipes. Butterfly valves are favored in many environmental engineering applications due to their simple structure, compact size, lightweight, and ease of installation. Valves play significant roles in sewage treatment, exhaust systems, and air regulation systems. When valves are fully open, fluid flows without resistance, making them suitable for situations where flow regulation is not needed.

Check valves, used to prevent media from flowing in reverse, are particularly important in sewage and waste gas treatment systems. They ensure that treated waste does not backflow, guaranteeing the normal operation of the system.