LG TVB140 Dry Screw Vacuum Pump Energy Efficient Design China Factory Direct Industrial dry single-stage claw vacuum pump designed for efficient, oil-free operation. Ideal for applications requiring clean, reliable vacuum generation, with low maintenance and high performance in moisture-sensitive environments. Description: LG Series screw vacuum pump is "NO OIL NO WATER" in contact with the process vapors,so they also called dry screw vacuum pump.