Tuthill Features Triple lip seals standard on all models Sight glasses standard on all models Magnetic drain plugs standard on all models Timed with precision helical gears, keyed to the rotor shafts Include double-row ball bearings at the gear end Rotors with integral shafts Reduced noise versions available with tri-lobe rotors Bi-directional rotation Dual oil splash lubrication at both gear and drive ends available on some models Specifications Applications: Pneumatic Conveying, Carpet Cleaning, Dairy Milking, Mosquito Fogging, Wastewater Aeration, Trenchless Drilling, Air Sparging, Vacuum Excavation, Dust Collection Max. Vacuum:12-16 in. Hg