Industrial liquid ring vacuum pumps for wet, humid, corrosive and demanding process applications. CompreVac supplies the Elmo Rietschle L-BV7, L-BV2, L-BV5 and L-BL2 liquid ring vacuum pump ranges, including complete self-contained closed-circuit L-BL2 vacuum systems.
Liquid ring vacuum technology supplied and supported by CompreVac.
Elmo Rietschle liquid ring pumps are engineered for wet and demanding process conditions. CompreVac supplies L-Series vacuum pumps, including specialist L-BL2 closed-circuit systems, together with application engineering, replacement equipment, parts and service.
Liquid ring vacuum pumps use a rotating impeller mounted eccentrically inside the pump casing. A rotating ring of operating liquid seals the impeller blades and creates variable-volume compression chambers.
As the impeller rotates, gas is drawn into the expanding chambers, compressed as the chamber volume decreases and then discharged together with part of the operating liquid.
This operating principle makes liquid ring technology particularly well suited to humid gases, wet vapours, steam and processes where condensation or moisture would create problems for many dry vacuum pumps.
High-quality materials and liquid ring compression make the L-Series well suited to corrosive, abrasive and moisture-rich industrial processes.
Material options include stainless steel, bronze, ceramic and coated cast iron.
Liquid ring technology is particularly tolerant of humid gases, steam and condensation.
Ceramic coatings and high-quality materials provide resistance in demanding processes.
L-BL2 systems recirculate operating liquid and eliminate the need for a continuous fresh-water supply.
The L-Series includes conventional monoblock liquid ring pumps and complete closed-circuit vacuum systems for applications where water consumption, process contamination and installation simplicity are important.
The L-BV7 series provides rugged liquid ring vacuum performance for wet and corrosive applications where long service life, process tolerance and material resistance are critical.
The compact L-BV2 monoblock series is designed for wet industrial vacuum applications and is particularly suited to installations where space, corrosion resistance and dependable operation are important.
The L-BV5 range provides higher-capacity liquid ring vacuum for industrial processes requiring strong resistance to erosion, corrosion, moisture and demanding continuous-duty conditions.
The Elmo Rietschle L-BL2 is much more than a conventional liquid ring pump. It is a fully packaged, self-contained closed-circuit vacuum system that recirculates its operating liquid rather than continuously consuming fresh seal water.
Often described as the “pump in the box”, the L-BL2 combines the liquid ring vacuum pump, liquid separation, cooling and recirculation equipment within one compact industrial package.
Traditional liquid ring pumps normally require a supply of operating liquid and supporting equipment to separate, cool and manage that liquid. The L-BL2 integrates those functions into a factory-engineered package.
This makes the L-BL2 particularly attractive where continuous fresh-water consumption is undesirable, cooling-water infrastructure is unavailable, or the customer wants a compact self-contained liquid ring vacuum system.
An eccentrically mounted impeller rotates inside the pump housing. The operating liquid forms a rotating ring around the casing, creating changing-volume chambers between the impeller blades that draw in, compress and discharge the process gas.
Liquid ring pumps are especially valuable where the process gas contains moisture, vapour, condensation or other conditions that are difficult for many dry vacuum pump technologies.
Wet process vacuum, product handling, evaporation and CIP-compatible installations.
Vacuum forming, extrusion and other processes involving moisture and vapours.
Compact liquid ring systems for wet or humid vacuum applications.
Vacuum handling of corrosive, condensable and process gases with appropriate materials.
Vacuum generation where steam, water vapour or condensation is present.
L-BL2 packaged systems where water conservation and self-contained operation are priorities.
Elmo Rietschle offers conventional liquid ring vacuum pumps together with the distinctive L-BL2 closed-circuit packaged vacuum system.
CompreVac supplies L-Series liquid ring vacuum pumps throughout North America together with application engineering, replacement equipment, system integration, parts and both field and workshop service support.
CompreVac has particular experience with L-BL2 self-contained systems, including pump replacement, system selection and applications where continuous fresh-water consumption is undesirable.
A liquid ring vacuum pump uses a rotating impeller and a ring of operating liquid to create variable-volume chambers that draw in, compress and discharge process gas.
Liquid ring pumps naturally tolerate moisture, wet vapours and condensation, making them particularly useful where these conditions would cause problems for many dry vacuum technologies.
The L-BL2 is a self-contained closed-circuit liquid ring vacuum system. It integrates the vacuum pump, operating-liquid separation, cooling and recirculation equipment into one packaged unit.
No. The operating liquid is recirculated through the closed system, so the L-BL2 does not require the continuous fresh seal-water supply normally associated with an open liquid ring vacuum system.
CompreVac supplies L-BL2 models including 2BL2041, 2BL2101, 2BL2251, 2BL2281 and 2BL2341. Individual technical datasheets can be downloaded directly from this page.
Selected L-BV and L-BL models are designed for inlet pressures down to approximately 33 mbar absolute. Actual performance depends on the pump, operating-liquid temperature and process conditions.
Water is commonly used, but the appropriate operating liquid depends on the process gas, materials of construction and chemical compatibility requirements.
L-BV models are conventional liquid ring vacuum pumps. The L-BL2 combines an L-BV-type liquid ring pump with separation, cooling and liquid recirculation equipment to create a complete closed-circuit vacuum package.
Yes. Selected Elmo Rietschle L-Series models are available in stainless steel and other material combinations for corrosive and demanding process applications.
Yes. Resistance to water, steam and condensation is one of the principal advantages of liquid ring vacuum technology.
CompreVac supplies and supports Elmo Rietschle L-BL2 closed-circuit liquid ring vacuum systems throughout North America, including application selection, replacement systems, parts and service support.
Yes. CompreVac can evaluate the vacuum duty, operating liquid, heat rejection, separators, controls, piping and materials of construction as part of an engineered liquid ring vacuum system.
Yes. CompreVac provides troubleshooting, parts, field service and workshop repair support for industrial liquid ring vacuum equipment.
Speak with CompreVac about L-BV7, L-BV2, L-BV5 and particularly the L-BL2 self-contained closed-circuit liquid ring vacuum system.
Operating Principle L-Series
Compression in L-Series pumps follows the liquid ring principle. The impeller is the only moving part inside the pump. It rotates without contact within the pump casing. A rotating liquid ring seals the impeller on the front and seals its blades against one another. In order to keep the liquid ring stable, liquid is also permanently sucked into the compression chamber and is output together with the conveyed gas.The excentrical arrangement of the impeller within the casing creates variable compression chambers between the impeller blades during rotation, which causes the conveyed gas to be compressed within a full revolution.Since the pumps always create a pressure difference during operation, they can also be used as compressors when pumping gas from the surrounding atmosphere.The L-BV product line features a patented discharge-air cooling system which returns the condensate to the operating liquid.
Please contact CompreVac for application assistance with vacuum pumps and associated equipment.
Please contact CompreVac for application assistance with vacuum pumps and associated equipment.
Please contact CompreVac for application assistance with vacuum pumps and associated equipment.
Please contact CompreVac for application assistance with vacuum pumps and associated equipment.
Compact version
Also known as the Elmo Rietschle "pump in the box", these portable units are oil-free and air-cooled. They include an L-BV liquid ring pump, an industrial electric motor, discharge separator, seal water cooler and discharge air cooler.
Split units
The L-BL2 split range family of pumps allow the user to take advantage of the L-BL technology in applications where higher air volume is needed or for special process requirements. They are suitable for applications involving aggressive suction materials and can also be implemented e.g. in the food & beverages industry where they are available in versions made entirely of stainless steel. We also offer versions equipped with all the valves including tubing required for integration into a CIP cleaning process. Air-to-water heat exchangers or plate heat exchangers are also available.