Delfin High Vacuum 22 Compact Hopper is an industrial vacuum cleaner with roots pump mounted on chassis for localized discharge. Very suitable for heavy duty jobs, this hopper has been designed for facing even the toughest challenges of ssteel industries, glass factories, heating and cogeneration, power plants and cement industries. The filtration is carried out by a M PTFE star filter with very large surface (75.3 ft2) and provides high resistance against clogging and passage of fine dust. The semiautomatic cleaning system guarantees the cleanliness of the filter and so its performance. The material can be quickly and safely discharged by means of a lever.