Liquid Ring Vacuum Pump Market By Pump Type (Single-stage, Multi-stage); By Application (Chemical Processing, Power Generation, Pharmaceuticals, Food & Beverage, Wastewater Treatment); By End User (Industrial Manufacturing, Oil & Gas, Pharmaceuticals, Environmental Management); By Geography, Segment Revenue Estimation, Forecast, 2026–2032

What Is the Liquid Ring Vacuum Pump Market Size and What Is Driving Its Growth? – (Updated On: 1-Sep-2026)

The Global Liquid Ring Vacuum Pump Market was valued at USD 2.60 billion in 2025 and is projected to reach USD 4.38 billion by 2032, expanding at a CAGR of 7.7% during 2026-2032, according to Strategic Market Research. The CAGR has been calculated directly from the 2025 and 2032 market values to keep the published quantitative baseline mathematically consistent.

 

Liquid ring vacuum pumps use a rotating service liquid to form the compression ring and are commercially valuable where process gases are wet, humid, vapor-laden or subject to liquid carryover. Current supplier portfolios position the technology across chemical and petrochemical processing, power, pharmaceuticals, food, pulp and paper, plastics, water treatment and other process industries. Material selection remains important in aggressive service; stainless-steel and other material options are used when process compatibility requires them.[2,3]

 

Demand is being created through two revenue routes: new process capacity and replacement or modernization of the installed base. The faster value shift is not only toward more pumps, but toward higher-content systems that bundle separators, recirculation equipment, heat exchangers, variable-speed drives, instrumentation and controls. This raises revenue per installation while helping operators reduce water use, stabilize vacuum under changing loads and integrate vacuum systems into broader plant-control architectures.[1]

 

Liquid Ring Vacuum Pump Market Key Report Takeaways Across Major Segments

Pump Type

• Single-stage pumps: 62.0% share, USD 1.612 billion in 2025, 7.2% CAGR. They remain the volume leader across general wet-gas, process-vacuum and installed-base replacement duties.

• Two-stage pumps: 38.0% share, USD 0.988 billion in 2025, 8.3% CAGR. They are the faster-growing pump type where process design favors sustained operation at lower suction pressures and demanding compression ratios.

 

Application

• Chemical Processing: 27.0% share, USD 0.702 billion in 2025, 7.8% CAGR.

• Power Generation: 18.0% share, USD 0.468 billion in 2025, 7.1% CAGR.

• Pharmaceuticals: 17.0% share, USD 0.442 billion in 2025, fastest application CAGR at 8.4%.

• Food & Beverage: 15.0% share, USD 0.390 billion in 2025, 7.5% CAGR.

• Wastewater Treatment: 14.0% share, USD 0.364 billion in 2025, 7.6% CAGR.

• Others: 9.0% share, USD 0.234 billion in 2025, 6.9% CAGR.

 

End User

• Industrial Manufacturing: 35.0% share, USD 0.910 billion in 2025, 7.4% CAGR.

• Oil & Gas: 24.0% share, USD 0.624 billion in 2025, 7.2% CAGR.

• Pharmaceuticals: 18.0% share, USD 0.468 billion in 2025, fastest end-user CAGR at 8.5%.

• Environmental Management: 23.0% share, USD 0.598 billion in 2025, 7.8% CAGR.

 

Geography

• Asia Pacific: 34.0% share, USD 0.884 billion in 2025, fastest regional CAGR at 8.7%.

• North America: 28.0% share, USD 0.728 billion in 2025, 7.1% CAGR.

• Europe: 25.0% share, USD 0.650 billion in 2025, 6.8% CAGR.

• Latin America: 7.0% share, USD 0.182 billion in 2025, 7.5% CAGR.

• Middle East & Africa: 6.0% share, USD 0.156 billion in 2025, 8.0% CAGR.

 

Application and end-user segmentation are independent views of the same market and should not be added together. In particular, Pharmaceuticals appears in both views because one measures process application and the other measures the purchasing organization.

 

Wet and Condensable Process Streams Protect Liquid Ring Pumps from Direct Dry-Vacuum Substitution

The strategic advantage of liquid-ring technology is process tolerance rather than maximum vacuum in every duty. Flowserve describes its current SIHI LPH range as capable of handling nearly all gases and vapors, including liquid carryover, while NASH highlights vacuum filtration, moisture removal, degassing, distillation and solvent recovery across process industries. These operating conditions are common where the inlet stream cannot be assumed to remain clean and dry.[2,3]

That operating envelope creates a defensible installed base in chemical plants, refineries, food processing, pulp and paper and steam-cycle systems. Liquid entering the pump is part of the compression mechanism rather than an abnormal contaminant, which can make the technology more forgiving when condensable vapor, droplets or intermittent carryover would complicate other vacuum technologies. Corrosive service still depends on materials and service-liquid compatibility, so corrosion resistance should be treated as an engineered configuration rather than an inherent property of every liquid-ring pump.[2]

Dry screw and other dry-vacuum technologies remain strong competitors where the process stream is clean and dry, water use is constrained, or solvent recovery and contamination control favor a dry system. The result is a segmented competitive boundary: liquid ring remains difficult to displace in wet and variable process duties, while dry technologies can win where utility economics and contamination-free operation carry greater weight.

 

Single-Stage Systems Hold Volume While Two-Stage Designs Target More Demanding Vacuum Duties

Single-stage pumps held 62.0% of the market at USD 1.612 billion in 2025 and are forecast to grow at 7.2%. Their leadership reflects broad use in general process vacuum, wet-gas handling and high-throughput industrial duties, together with a large installed base that supports replacement and rebuild demand. Current suppliers offer single-stage designs across compact and very high-flow configurations, allowing plants to standardize the technology across multiple operating points.[2,5]

Two-stage pumps accounted for 38.0% or USD 0.988 billion and have the faster pump-type CAGR at 8.3%. Busch positions its DOLPHIN LM models as single-stage and LT models as two-stage for higher vacuum, with LT products reaching approximately 33 mbar absolute. Atlas Copco likewise positions its AWD two-stage range for continuous service below 200 mbar absolute, including distillation, drying, degassing and evaporator duties.[4,1]

Stage count, however, should not be used as a stand-alone performance rule. Atlas Copco and Pompetravaini both list current single-stage products capable of approximately 33 mbar absolute, which means attainable vacuum also depends on hydraulic design, gas load, service-liquid temperature, cavitation margin and system configuration. For market analysis, the more defensible distinction is that two-stage designs gain strategic value in demanding low-pressure duties, not that every two-stage machine necessarily reaches a deeper vacuum than every single-stage design.[1,5]

 

Chemical Processing Anchors Revenue While Pharmaceuticals Add the Fastest High-Specification Demand

Chemical Processing generated 27.0% of 2025 revenue at USD 0.702 billion and is growing at 7.8%, making it the largest application. Distillation, evaporation, filtration, solvent recovery and drying expose vacuum equipment to condensable or compositionally variable process streams, which aligns closely with liquid-ring operating strengths. India’s three operational Petroleum, Chemicals and Petrochemicals Investment Regions had attracted Rs 3.4 lakh crore of investment and supported more than 2,200 chemical manufacturing units by August 2026, providing a current indicator of the region’s process-equipment pipeline.[3,8]

Power Generation accounted for 18.0% or USD 0.468 billion and is forecast at 7.1%. The most direct liquid-ring revenue route is condenser evacuation and continuous air removal in steam-cycle plants. NASH documents engineered condenser-exhauster systems using liquid-ring pumps, including a natural-gas-fired power project supplied with 24 single-stage units. Global electricity generation increased by more than 850 TWh in 2025, but renewables accounted for most of the increase; liquid-ring demand in power is therefore better understood as installed-base replacement, conventional steam capacity and selected new thermal projects rather than a direct function of total electricity growth.[3,10]

Pharmaceutical applications represented 17.0% or USD 0.442 billion in 2025 and have the fastest application CAGR at 8.4%. Filtration, solvent handling, evaporation, drying and other batch operations can require higher-specification vacuum packages with suitable materials, instrumentation and containment. Lilly announced more than USD 3.5 billion for a new Pennsylvania injectable medicine and device facility in January 2026 as part of a U.S. manufacturing expansion exceeding USD 50 billion since 2020. No liquid-ring order has been disclosed; the investment is used here only as evidence of new pharmaceutical process infrastructure entering the equipment pipeline.[12]

Food & Beverage held 15.0% or USD 0.390 billion and is growing at 7.5%. Atlas Copco currently lists milk evaporation, bottling, fruit processing, cheese production, poultry and meat evisceration among liquid-ring applications. The commercial fit is strongest where moisture-rich gas streams and product vapor are inherent to the process, supporting demand for robust systems that tolerate wet inlet conditions without relying on a completely dry gas path.[1]

Wastewater Treatment accounted for 14.0% or USD 0.364 billion and is forecast at 7.6%. The direct demand case comes from supplier-verified water-treatment, vacuum-filtration, degassing and moisture-removal duties rather than from treating all sanitation expenditure as addressable pump revenue. NASH explicitly includes water treatment and wastewater-related applications within its liquid-ring portfolio. As secondary infrastructure context, the U.S. EPA reports 17,544 publicly owned treatment works serving 270.4 million people and USD 630.1 billion of clean-water infrastructure needs over its survey horizon, including USD 66.6 billion for secondary treatment and USD 83.6 billion for advanced treatment.[3,11]

The Others category represented 9.0% or USD 0.234 billion and is growing at 6.9%. It covers residual process duties including pulp-and-paper dewatering, plastics extrusion and forming, general filtration, drying, conveying and degassing. These uses create a broad replacement market but generally lack the concentrated greenfield investment profile of chemical and pharmaceutical manufacturing, which supports a more moderate growth rate.[1,2]

 

Industrial Manufacturing Provides the Broadest Installed Base, While Oil & Gas Remains Replacement-Intensive

Industrial Manufacturing led end-user demand with 35.0% or USD 0.910 billion in 2025 and is growing at 7.4%. The segment is broad because a single facility may use vacuum across forming, drying, filtration, conveying, degassing or wet process-gas removal. That diversity reduces dependence on one downstream cycle and creates recurring revenue through pump replacement, rebuilds, controls upgrades and packaged-system retrofits.

Oil & Gas accounted for 24.0% or USD 0.624 billion and is expanding at 7.2%. Refineries and downstream plants use liquid-ring equipment where hydrocarbon vapors, moisture or process contaminants must be handled reliably. The United States had 130 operable refineries and 18.16 million barrels per calendar day of operable atmospheric distillation capacity on January 1, 2026. With U.S. refining capacity declining during 2025, the commercial opportunity is weighted toward turnarounds, reliability projects, debottlenecking and replacement rather than widespread refinery greenfield construction.[9]

Pharmaceutical end users represented 18.0% or USD 0.468 billion and have the fastest end-user CAGR at 8.5%. These customers can require higher-specification packages because the vacuum system must fit controlled manufacturing environments and handle variable batch loads, solvents or corrosive media. The value opportunity extends beyond the bare pump to separators, heat exchangers, instruments, automation and service support, making project content as important as unit volume.

Environmental Management held 23.0% or USD 0.598 billion and is growing at 7.8%. The segment includes municipal and industrial treatment operations where liquid-ring systems are applied to specific wet-gas, filtration, degassing and related process duties. EPA’s capital-needs data indicate a substantial modernization pipeline, but only the portions requiring vacuum or gas-handling systems should be treated as addressable demand. This distinction prevents broad wastewater investment figures from being overstated as pump revenue.[3,11]

 

Seal-Liquid Recovery and Variable-Speed Control Are Increasing Revenue per Installation

Utility economics are becoming a product-level competitive factor. Atlas Copco states that partial-recirculation configurations can deliver typical water savings of about 50% compared with once-through operation, while total-recovery systems can save up to 95% by cooling and reusing the recovered seal liquid. These configurations directly address one of the principal operating-cost disadvantages of liquid-ring technology.[16]

Variable-speed control increases the value proposition further by matching vacuum generation and seal-liquid circulation to process demand. Atlas Copco’s LRP VSD+ platform uses variable-speed technology and is offered in once-through, partial-recirculation and total-recovery configurations. The current LRP 1000 VSD+ is rated at 1,050 m3/h dry nominal capacity, 1,140 m3/h with saturated gas and 25 mbar absolute ultimate pressure, illustrating how suppliers are combining process tolerance with digitally controlled package performance.[1]

This changes competitive economics. A supplier that sells only a bare pump competes primarily on machine price, materials and performance. A supplier that integrates separators, heat exchangers, controls, cavitation protection, seal-liquid recovery and monitoring can compete on lifecycle cost, utility savings, installation risk and service support. As a result, market revenue can grow faster than pump-unit demand where customers migrate toward higher-content engineered skids.

 

API 681 and ATEX Requirements Raise the Qualification Barrier in Hazardous Process Applications

Liquid-ring vacuum pumps used in petroleum, chemical and gas services can face project specifications that materially affect design, testing and supplier qualification. The American Petroleum Institute currently lists API Standard 681, Liquid Ring Vacuum Pumps and Compressors, in its standards catalog. In Europe, ATEX Directive 2014/34/EU governs equipment intended for potentially explosive atmospheres, and the European Commission issued the sixth edition of its ATEX guidelines in January 2026.[6,7]

These requirements matter commercially because they increase the importance of documented design practice, materials, conformity assessment, testing and engineered-package capability. Flowserve’s current SIHI LPH range includes ATEX-compliant designs, showing how hazardous-area qualification is embedded in supplier offerings rather than treated only as external paperwork.[2]

 

Asia Pacific Is Greenfield-Led While North America and Europe Are More Replacement- and Upgrade-Led

Asia Pacific led the market with 34.0% or USD 0.884 billion in 2025 and also has the fastest regional CAGR at 8.7%. The region combines a large installed chemical, refining and manufacturing base with continuing capacity additions. India’s three operational PCPIR clusters had attracted Rs 3.4 lakh crore of investment and facilitated more than 2,200 chemical manufacturing units by August 2026. This creates both greenfield vacuum-system opportunities and a growing future service base.[8]

North America accounted for 28.0% or USD 0.728 billion and is forecast to grow at 7.1%. The region’s strength comes from installed process capacity and selective new pharmaceutical investment. The U.S. had 130 operable refineries and 18.16 million barrels per calendar day of operable atmospheric distillation capacity at the start of 2026, while Lilly’s U.S. manufacturing commitments exceeded USD 50 billion since 2020. The mix supports replacement-heavy refinery demand alongside greenfield life-science projects.[9,12]

Europe held 25.0% or USD 0.650 billion in 2025 and is growing at 6.8%. Eurostat reported EU chemical production of 224 million tonnes in 2024, up 6% from 2023 but 15% below its 2014 level. This supports a more mature demand profile in which liquid-ring spending is weighted toward replacement, water and energy optimization, corrosion-resistant upgrades, hazardous-area compliance and reliability improvement rather than rapid additions of basic chemical capacity.[13]

Latin America represented 7.0% or USD 0.182 billion and is expanding at 7.5%. Food processing, pulp and paper, chemicals, mining and sanitation create a diversified process-equipment base. The Inter-American Development Bank approved a USD 2.0 billion Sustainable, Resilient and Inclusive Sanitation Program for Brazil in November 2025, and the program is in implementation. This is not a vacuum-pump procurement contract; it is a secondary indicator of treatment-infrastructure modernization that can support selected vacuum and gas-handling opportunities.[14]

Middle East & Africa held 6.0% or USD 0.156 billion and is growing at 8.0%. Refining and petrochemical investment provides the clearest high-value route. Aramco, Sinopec and Yasref signed a framework agreement for a planned Yanbu expansion whose engineering studies cover a 1.8 million-ton-per-year mixed-feed steam cracker and a 1.5 million-ton-per-year aromatics complex. No liquid-ring order has been disclosed, but integrated petrochemical projects of this scale create multiple potential vacuum duties and expand the future installed base.[15]

 

Competition Is Moving from Bare Pumps Toward Engineered Skids, Utility Efficiency and Lifecycle Service

Competition combines global vacuum groups, diversified flow-control companies and specialist liquid-ring manufacturers. Because the basic technology is mature, differentiation increasingly comes from operating range, materials, water-management architecture, variable-speed control, hazardous-area capability, engineered packaging and service support. Large process projects also favor suppliers able to manage system design and performance responsibility rather than supply only a bare machine.

Atlas Copco competes through conventional liquid-ring models and the LRP VSD+ packaged platform. Its current portfolio combines total-recovery and once-through architectures with variable-speed control, integrated controls and multiple heat-exchanger configurations. The platform’s positioning around water reduction and controllability illustrates how utility cost is becoming a competitive feature, not merely a plant-level operating issue.[1]

Flowserve competes through SIHI liquid-ring pumps and engineered packages. The current LPH range includes single- and two-stage between-bearing designs, flows up to 10,350 m3/h, suction pressure to 33 mbar absolute, a range of materials and ATEX-compliant configurations. Its wider service capability strengthens its position where customers value lifecycle support around large process installations.[2]

Ingersoll Rand participates through NASH, whose engineered-systems organization states that it has completed more than 6,000 custom projects. NASH emphasizes liquid-ring solutions for chemical, petrochemical, water treatment, food and power applications, including engineered condenser-exhauster and process-gas systems. This system-integration orientation is particularly relevant where vacuum equipment must be customized around process gases, filtration, separation or site-specific safety requirements.[3]

Busch competes through the DOLPHIN family, with LM single-stage and LT two-stage machines plus complete vacuum units and recirculation options. Its product structure gives users a clear progression from general process duties to higher-vacuum two-stage service while retaining liquid-ring tolerance to wet process conditions.[4]

Pompetravaini represents the specialist-manufacturer side of the market. Its current range spans compact single-stage TRM units, double-stage TRH pumps and large TRVK/TRSK machines rated up to 30,000 m3/h. The breadth of this portfolio shows why the market is unlikely to consolidate solely around diversified industrial groups: specialist suppliers can remain competitive through application depth, broad hydraulic coverage and custom materials or configurations.[5]

 

Water Consumption and Dry Screw Technology Define the Market's Growth Ceiling

The principal forecast constraint is lifecycle operating cost. Liquid-ring systems require service liquid, and closed-loop designs can add heat exchangers, cooling duty, separators and treatment requirements. Once-through arrangements become less attractive where water availability, wastewater disposal or cooling cost is high. The industry’s response is visible in partial recirculation, total recovery, variable-speed operation and improved control of seal-liquid flow.[1]

Dry screw and other dry technologies also limit expansion in clean, dry processes where eliminating service liquid improves plant economics or product integrity. The commercial winners in liquid ring are therefore likely to be suppliers that preserve the technology’s tolerance to wet, condensable and variable gas streams while lowering water, energy and maintenance per operating hour. That combination protects installed-base relevance and increases the probability that replacement projects upgrade to higher-value packages rather than switch technology.

 

Research Methodology, Scope and Evidence Standard

Strategic Market Research defines this market as liquid ring vacuum pumps and pump-led packaged systems where separators, seal-liquid recirculation equipment, heat exchangers, instrumentation and controls are supplied as part of the vacuum solution. Dry screw, rotary vane, claw and steam-ejector vacuum technologies are excluded. Standalone liquid-ring compressor revenue is excluded unless the product is sold within a combined liquid-ring vacuum offering. The pump-type segmentation uses Single-Stage and Two-Stage terminology; this replaces the less precise Multi-Stage label used in the earlier draft.

The 2025 market value, 2032 forecast and supplied segmentation shares were treated as the Strategic Market Research quantitative baseline. The global CAGR is calculated directly from USD 2.60 billion in 2025 and USD 4.38 billion in 2032 and rounds to 7.7%. Subsegment CAGRs are presented to one decimal place, so independently compounding every rounded subsegment rate can produce a small variance from the rounded global forecast. External syndicated market-research forecasts were not used to overwrite the SMR quantitative baseline.

Qualitative evidence was refreshed using current primary or authoritative sources: government and multilateral agencies, standards bodies, supplier technical pages and customer project disclosures. Customer investments and infrastructure programs are treated as demand indicators unless a liquid-ring vacuum-pump order is explicitly disclosed. Planned projects are described as planned, and broad capital programs are not presented as directly addressable pump revenue.

 

Liquid Ring Vacuum Pump Market Report Coverage Table

Report Attribute	Details
Forecast Period	2026 – 2032
Market Size Value in 2025	USD 2.60 Billion
Revenue Forecast in 2032	USD 4.38 Billion
Overall Growth Rate	CAGR of 7.7% (2026 – 2032)
Base Year for Estimation	2025
Historical Data	2019 – 2024
Unit	USD Million, CAGR (2026 – 2032)
Segmentation	By Pump Type, By Application, By End User, By Geography
By Pump Type	Single-Stage Pumps, Two-Stage Pumps
By Application	Chemical Processing, Power Generation, Pharmaceuticals, Food & Beverage, Wastewater Treatment, Others
By End User	Industrial Manufacturing, Oil & Gas, Pharmaceuticals, Environmental Management
By Region	North America, Europe, Asia Pacific, Latin America, Middle East & Africa
Country Scope	U.S., Canada, UK, Germany, France, Italy, Spain, Australia, Japan, South Korea, India, China, Brazil, Mexico, Saudi Arabia, UAE, South Africa
Market Drivers	New process capacity, installed-base replacement and modernization, wet and condensable gas-handling requirements, adoption of engineered vacuum skids, seal-liquid recovery, variable-speed control, chemical and pharmaceutical investment
Customization Option	Available upon request