Industrial vacuum cleaners run on three-phase electricity and are fitted with cartridge filters. The Hydra Series industrial vacuum cleaners are designed for heavy-duty, continuous operation. These machines can be used to pick up both dry and liquid waste. The Hydra Series industrial vacuum cleaners have a solid steel frame and are built to withstand tough site conditions. These heavy-duty vacuum cleaners can be used for a wide variety of applications including pharmaceutical, chemical, food processing etc. The machines are also available in ATEX explosion proof models.