1.Using 3-level expansion tube, vacuum flow large, save energy.

2.Can optionally supply valve/quick release valve, vacuum detection port can install digital pressure switch. 2.Can optionally supply valve/quick release valve, vacuum detection port can install digital pressure switch. 2.Can optionally supply valve/quick release valve, vacuum detection port can install digital pressure switch.

3.Built-in vacuum filter, optional built-in silencer.

4.Can be installed in 3 directions (top/bottom/side), to adapt to different installation occasions needs.