The content of the full maintenance of pneumatic butterfly valve has the following aspects:
1. Clean the old grease or seal fat with a detergent. The specific method is to circumvent the cleaning agent, and the valve is injected, so that the cleaning agent is laid on the sealing surface, and the cleaning agent can be left in the valve to invade for 1 to 2 days.
2. Make the valve in a closed state, open the valve body discharge port or empty the mouth to reduce the valve cavity pressure.
