Siemens Energy (Elmo Rietschle)

Elmo Rietschle, a brand under Siemens Energy, is a globally recognized manufacturer of vacuum and overpressure technology headquartered in Germany, with a product portfolio spanning eight core technologies for industrial and environmental applications. The brand's most significant offerings for water and wastewater treatment are the L-Series liquid ring vacuum pumps and compressors and the R-VWP rotary lobe vacuum pumps. The L-Series includes the L-BV2 covering 27 to 1,200 cubic meters per hour, the L-BV5 with suction pressures down to 33 millibar, and the L-BV7 which reduces water consumption by 50 percent compared to earlier designs; all feature anti-cavitation protection as standard and are available in stainless steel, bronze, ceramic, and cast iron with ceramic coating. The R-VWP rotary lobe line spans four models from 485 to 2,752 cubic meters per hour with dry-running oil-free compression chambers and bypass valve protection. Additional product families include the G-Series regenerative side channel blowers for low-pressure aeration and pneumatic conveying, C-Series claw vacuum pumps and compressors for dry oil-free operation, S-Series screw vacuum pumps for deep vacuum applications, V-Series rotary vane pumps in dry and oil-lubricated versions, and F-Series radial blowers. Water and wastewater applications include digester gas handling, aeration basin air supply, vacuum extraction of filtration systems, scum and grease removal, odor control scrubbers, sludge oxygenation, filter rinsing, and central vacuum systems. The brand operates global sales and service networks supporting municipal and industrial water treatment customers.