LG-20 Dry Oil-Free Screw Vacuum Pump LG Series Dry Oil-Free Screw Vacuum Pump with air/water cooling options, high vacuum 1Pa, CE certified, ideal for oil & gas recovery applications. Key Features Oil-free dry design for clean, environmentally friendly operation with no wastewater discharge Ultimate vacuum 1 Pa with high pumping speed in high vacuum regions Optional air-cooled or water-cooled cooling methods Corrosion-resistant flow-through components in titanium, stainless