The multistage COAX® vacuum ejector is designed so the maximum vacuum level can be adjusted by the compressed air feed pressure. By using a piSAVE® optimize, you can set the specific vacuum level needed and the piSAVE® optimize will adjust the feed pressure to the pump accordingly. You will never use more compressed air than needed in the application. Please also try the piSAVE® optimize calculator to see the actual energy saving by doing this.