VAC-U-MAX positive displacement vacuum pump packages range in sizes from 3 Hp to 100 Hp. These vacuum pump packages are ideal for an existing vacuum conveying system or a central vacuum cleaning system. Using a large area cartridge filter to protect the pump, the pump packages run smoother and quieter. All pump packages come with a standard large area cartridge filter, OSHA approved belt guard, glycerin-filled vacuum gauge, silencer and high vacuum relief valve. Options include differential pressure switch and sound enclosures.