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Single Stage Venturis :
0.7:1
Volkmann has developed a unique, multi-stage Venturi pump, the Multijector, which increases overall operational efficiency in a vacuum conveying system. This patented Multijector pump incorporates the basic advantages of compressed air driven (Venturi) vacuum pumps small size, low weight, simple design, little maintenance and wear-resisting operation and has modified them to keep the same high vacuum, utilize the same energy but provide substantially more suction (induced air).