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Busch Vacuum Pumps and Systems has now launched an entirely new series of liquid ring vacuum pumps. The new Dolphin LM/LT vacuum pumps have been completely redesigned but are based on proven liquid ring vacuum technology. With these new vacuum pumps, Busch has been able to optimize an existing product that has become an established part of many industrial processes, resulting in the development of extremely powerful, yet energy-efficient vacuum pumps.

Dolphin LM models are single-stage vacuum pumps for the rough vacuum range from atmospheric pressure to 100 Torr ultimate pressure. Dolphin LT models are available in two-stage versions and cover the vacuum range from atmospheric pressure to 25 Torr. A total of 13 sizes are available so that a precisely coordinated solution can be found for any process. Dolphin LM/LT vacuum pumps have a modular design and integrated flow channels. This makes them extremely compact and the optional motor pedestal eliminates the need for base frames, since the NEMA Premium efficiency motor is directly flange-mounted. The new seal concept with mechanical shaft seals, made of FKM or FFKM depending on the pumping medium, ensures a long life cycle. The standard material for the impeller is stainless steel. A stainless steel version of the housing is available as an option.

Water or a fluid suitable for the process medium is used as the operating fluid. Ethylene glycol, mineral oils or organic solutions can also be used, as well as condensable in the process gas. Dolphin LM/LT liquid ring vacuum pumps can be operated in once-through circulation systems, in open, or in closed liquid cycles. Their high vapor and particle tolerance makes them exceptionally well-suited for removal/extraction of wet gases or vapors. They are ideal for processing chemicals, pharmaceuticals, foodstuffs, oil and plastics, as well as wood impregnation and drying processes, and many other industrial processes. Dolphin LM/LT vacuum pumps are available in sizes with pumping speeds of 58 to 510 ACFM. Versions for operation in potentially explosive environments are available in different ATEX-compliant versions and temperature classes.

Busch has launched two new series of liquid ring vacuum pumps in a total of 13 sizes