The ZK2 series is an energy-saving vacuum generator with 90% reduced air consumption. It has a 50% increase in suction flow compared to other single stage SMC generators. With its compact size and light weight, it is easier to maintain. For ZK2 model selection and to download CAD files:
https://www.smcusa.com/products/ZK2-Vacuum-Unit-Vacuum-Generator-Vacuum-Pump-System~90207