ZL Series multistage ejector has been developed as the answer to all of the above. Multistage ejectors considerably improve the relation between air consumption and suction capacity. Their design allows suction flow to be more than doubled while the supplied air does not vary. All these in a lightweight and compact body, with the components for the vacuum ejector integrated in the one unit. The 3-stage diffuser construction also eliminates the need for extra ejectors, thereby increasing energy efficiency.