Dry Vaccum Pumps. Technical Bulletin - SIHI Dry PD H 250, 400, 630, 750, 1000 - up to 950 m³/h, < 0.01 mbar. Technical Bulletin - SIHI Dry PD Mi 450, 650 - up to 680 m³/h, < 0.001 mbar. Technical Bulletin - SIHI Dry PD M 100, 160, 250, 400 - up to 400 m³/h, < 0.001 mbar. Catalogue - SIHI Dry CD S160 to S1000, V250 and 400 - up to 1000 m³/h ...