2 stage filtration automatic self filter cleaning industrial HEPA dust vacuum

Main features:
1. Three powerful Ametek motors, can work with a grinder working width below 750mm.
2. The independently controlled switches avoid burning out the switch when starting the vacuum.
3. Bersi patent Auto Pulsing technology, no manual cleaning, saves labor time greatly.
4. OSHA compliant 2- stage filtration system. In the primary stage, the three cylindrical filters take turns pulsing clean.
In the second stage, 3PCS H13 HEPA filters with 99.99% @0.3μm efficiency.