The second is to clean the oil tank regularly in time, which is a very practical and efficient way to effectively avoid internal leakage. The oil shall be filtered strictly during oil injection. When the pneumatic butterfly valve is overhauled, it is not allowed to use the broken step with cotton yarn head. Pay attention to these details to ensure the cleanliness of the oil. At present, the maintenance cycle of the butterfly valve system produced by Shanghai Dongfang Pump and Valve Factory is one year, which can help customers provide free equipment maintenance to ensure the normal operation of the equipment. 　　　　

To put it bluntly, the reason why the pneumatic butterfly valve does not switch in place and the seal ring leaks is that the daily maintenance of the butterfly valve is not done well. Next, we will briefly summarize: (1) When using pneumatic butterfly valve, it should be confirmed in advance whether the valve is in full open state, and then do a good job in cleaning the pipeline. There should be no welding slag and other sundries scratching the sealing surface; (2) Generally, the pneumatic butterfly valve will be provided with a bypass pipeline. If it is necessary to repair or replace the pneumatic butterfly valve, the bypass pipeline can be used as usual; (3) As for the installation, the butterfly valve can be installed vertically and horizontally within 180 degrees, and the pneumatic actuator cannot be installed directly towards the countryside; (4) If the stuffing box leaks during the use of the butterfly valve, it is necessary to tighten the gland bolts.