Vacuum PumpThe new Dolphin LX B series liquid ring vacuum pumps offer improved pumping speeds at deeper vacuum levels. These high-efficiency, single-stage pumps provide end vacuum levels comparable to most two-stage designs. All Dolphin LX series vacuum pumps are of a compact, motor-mounted design. The standard construction includes cast iron housing, a 316 stainless steel impeller, replaceable port plate and mechanical seal. Requiring minimal maintenance, these rugged pumps are an economical alternative to traditional close-coupled, separate-drive or base-mounted liquid ring configurations.