Let's talk about pneumatic butterfly valve first. The relationship between the opening of the pneumatic butterfly valve and the flow is basically linear proportional. If it is used to control the flow, its flow characteristics are also closely related to the flow resistance of the piping. If the diameter and form of the installed valves of the two pipelines are identical, but the pipeline loss coefficient is different, the flow of the valves will also be greatly different.

If it is found during commissioning that the manufacturer of pneumatic butterfly valve is very slow in opening the valve at the initial position, but it will be very fast after the action. If it is found during commissioning that the valve is very slow in opening the valve at the initial position, but it will be very fast after the action, this situation is that the valve is closed too tightly, Just turn down the stroke of the cylinder a little (turn the stroke adjusting screws at both ends of the cylinder a little inward at the same time, and when adjusting, move the valve to the open position, and then turn off the air source and adjust it again), until the valve can be opened easily and closed in place without leakage.