Where is the pneumatic flapper valve of the vacuum system?

Corners and tees in vacuum lines. According to the installation instructions and application scope of the pneumatic flapper valve in vacuum system, it can be known that the pneumatic flapper valve in vacuum system is an element used to adjust the air flow and cut off or connect the pipeline in vacuum system, which is placed at the corner and tee of vacuum pipeline and driven by manual, pneumatic, electromagnetic and electric methods.