In case of negative pressure in the pipeline, this valve quickly sucks in external air to protect the pipeline from damage caused by negative pressure. The composite exhaust valve is used at the highest point on the sewage pipeline or at places with closed air, to clear the pipeline and achieve normal operation by expelling the gas inside the pipeline.
If an exhaust valve is not installed, the pipeline may experience air resistance at any time, which means that the water outlet capacity of the pipeline cannot meet the design requirements. Secondly, if a power outage or pump shutdown occurs during operation, the pipeline may experience negative pressure and cause vibration or rupture. The exhaust (suction) valve quickly sucks air into the pipeline to prevent vibration or rupture.
