Are you looking for a reliable gas cooled Roots vacuum pump manufacturer for chemical processing, vacuum distillation, solvent recovery, drying, heat treatment, metallurgy, coating, or other demanding industrial vacuum applications?
Gas-cooled Roots vacuum pumps are more specialized than conventional Roots boosters. By circulating relatively cool gas through the pump, these designs can operate across higher pressure differentials while controlling rotor and pump-body temperature. Depending on the design, they may operate as standalone pumps over part of the pressure range or be combined with liquid ring, dry screw, rotary vane, or other backing pumps to form a complete vacuum system.
For this reason, buyers should not select a supplier simply because it manufactures ordinary Roots vacuum pumps. A suitable supplier should provide clear evidence of an air-cooled, gas-cooled, or gas-circulation-cooled Roots product line and should be able to confirm the operating pressure, differential-pressure limit, gas compatibility, cooling arrangement, sealing configuration, and required backing-pump combination for the actual process.
The following 10 manufacturers were selected because their available product information specifically identifies gas-cooled, air-cooled, or gas-circulation-cooled Roots vacuum pump technology. The numbering is intended to organize the comparison rather than represent a universal performance ranking.
Quick Navigation
- DV VACUUM
- Pfeiffer Vacuum
- EVP Vacuum
- Shandong Huacheng Group
- Shandong Boke Vacuum Technology
- Bozhong Industrial Equipment
- Lvsong / Elm Vacuum
- SOUZ Vacuum
- FORYOU Pump
- Mibay Vacuum
1. DV VACUUM
Website: https://www.dvvacuum.com/
Supply Model: China-based industrial vacuum pump manufacturer providing Roots vacuum pumps and customized vacuum systems.
Relevant Products: Circulatory Gas Cooled Roots Vacuum Pumps, conventional Roots vacuum pumps, dry screw vacuum pumps, liquid ring vacuum pumps, oil rotary vane vacuum pumps, and integrated Roots-based vacuum systems.
Why Consider DV VACUUM: DV VACUUM is particularly relevant to industrial buyers that need a gas-cooled Roots pump to be selected as part of a complete process-vacuum configuration rather than treated as an isolated component. Its product scope allows Roots pumps to be combined with different backing technologies according to operating pressure, gas load, condensable vapor, process contamination, and utility conditions.
This makes DV VACUUM suitable for projects where the buyer is comparing a standalone Circulatory Gas Cooled Roots Vacuum Pump with a Roots-dry screw, Roots-liquid ring, or other engineered vacuum package.
Best Suited For: Chemical processing, pharmaceutical production, vacuum drying, vacuum distillation, solvent recovery, new energy production, industrial degassing, and buyers sourcing customized process-vacuum systems directly from a pump manufacturer.
Before Purchasing: Confirm whether the application requires a standalone gas-cooled Roots pump or a complete vacuum package. Provide normal operating pressure, required pumping speed, gas composition, condensable vapor load, operating temperature, corrosion risk, backing-pump requirements, cooling-water conditions, hazardous-area requirements, voltage/frequency, and control interface. Material, coating, sealing, purge, and explosion-protection requirements should be confirmed with the engineering team for the specific configuration.
2. Pfeiffer Vacuum
Website: https://www.pfeiffer-vacuum.com/
Supply Model: Global vacuum technology manufacturer offering pumps, components, measurement products, chambers, and engineered vacuum solutions.
Relevant Products: OktaLine G gas-circulation-cooled Roots pumps, conventional Roots pumps, backing pumps, dry pumps, high-vacuum equipment, and integrated vacuum systems.
Why Consider Pfeiffer Vacuum: Pfeiffer is one of the clearest international reference suppliers for gas-circulation-cooled Roots technology. Its OktaLine G documentation specifically describes Roots pumps designed for operation at high differential pressures and compression ratios through gas-circulation cooling.
The company is especially relevant for buyers who prioritize a mature global vacuum brand, documented system engineering, standardized accessories, and integration with other vacuum technologies.
Best Suited For: Industrial vacuum systems, metallurgy, steel degassing, heat treatment, coating, research, high-throughput vacuum processes, and multinational users that value established technical documentation and service infrastructure.
Before Purchasing: Confirm the current OktaLine G model appropriate for the required pumping speed and pressure range, whether a backing pump is needed, gas and vapor compatibility, sealing-gas requirements, motor and electrical configuration, accessories, controls, ATEX or other certification requirements where applicable, and local service availability.
3. EVP Vacuum
Website: https://www.evpvacuum.com/
Supply Model: China-based vacuum pump and industrial vacuum system supplier serving a wide range of process industries.
Relevant Products: ZJQ Series Air-Cooled Roots Vacuum Pumps, ERP/ER Roots pumps, air-cooled Roots-liquid ring vacuum systems, liquid ring pumps, dry screw pumps, and industrial vacuum packages.
Why Consider EVP Vacuum: EVP provides direct product-level evidence for its ZJQ air-cooled Roots range instead of listing only conventional Roots boosters. Its ZJQ product line is designed for continuous operation under higher pressure differential, and EVP also offers air-cooled Roots and liquid-ring combinations for applications requiring a complete process-vacuum package.
This makes EVP useful for buyers comparing both standalone air-cooled Roots equipment and packaged systems using wet backing-pump technology.
Best Suited For: Vacuum drying, distillation, degassing, metallurgy, chemical processing, power applications, and industrial projects requiring an air-cooled Roots booster combined with a backing pump.
Before Purchasing: Confirm the required ZJQ model, allowable operating pressure and differential pressure, whether the pump will operate alone or with a backing pump, cooling-gas arrangement, motor sizing, process-gas compatibility, condensable load, and whether a liquid-ring, screw, or other backing technology is more appropriate for the process.
4. Shandong Huacheng Group
Website: https://www.huachenggroup.net/
Supply Model: China industrial pump and vacuum-equipment manufacturing group supplying pumps and supporting systems.
Relevant Products: ZJQ Air-Cooled Roots Pumps, ZJP Roots pumps, liquid ring vacuum pumps, and industrial vacuum systems.
Why Consider Huacheng: Huacheng's ZJQ product documentation specifically describes an air-cooled Roots vacuum pump that circulates and cools the rotor and pump body using an external cooler. The design is intended to support continuous operation under relatively high differential pressure without thermal overload.
Huacheng also manufactures liquid ring equipment, which can be relevant to users evaluating Roots-plus-liquid-ring combinations for vapor-rich or wet process duties.
Best Suited For: Chemical and general industrial vacuum, large-capacity vacuum systems, distributors, OEMs, and users that need both Roots and liquid-ring vacuum technologies from the same manufacturing group.
Before Purchasing: Confirm the ZJQ model range required for the duty, whether the pump must discharge toward atmosphere or operate with another pump stage, external cooler sizing, return-gas piping, seal configuration, process-gas temperature, condensable vapor content, backing-pump selection, and expected continuous differential pressure.
5. Shandong Boke Vacuum Technology
Website: https://www.bokevac.com/
Supply Model: China vacuum-equipment manufacturer specializing in industrial vacuum pumps and complete vacuum-acquisition systems.
Relevant Products: ZJQ gas-cooled Roots pumps, ZJP Roots pumps, variable-pitch dry screw vacuum pumps, liquid ring vacuum pumps and compressors, Roots-screw systems, Roots-liquid ring systems, and multi-stage gas-circulation-cooled Roots vacuum systems.
Why Consider Boke Vacuum: Boke provides particularly strong evidence for gas-cooled Roots technology because its product scope includes both individual ZJQ gas-cooled Roots pumps and multi-stage gas-circulation-cooled Roots systems.
Its documented system examples also make it relevant to buyers whose application cannot be solved simply by purchasing a single booster and instead requires several Roots stages or integration with other vacuum technologies.
Best Suited For: Pharmaceutical, fine chemical, petrochemical, corrosion-sensitive vacuum processes, process-vacuum skids, and projects where several pump stages must be engineered as one system.
Before Purchasing: Confirm whether the required solution is a single ZJQ pump or a multi-stage gas-circulation system. Provide the complete operating-pressure profile, gas composition, corrosion risk, vapor load, desired ultimate pressure, capacity at operating pressure, required materials or coatings, inter-stage cooling requirements, and control philosophy.
6. Bozhong Industrial Equipment
Website: https://en.zbbz.com/
Supply Model: China industrial vacuum-equipment manufacturer supplying Roots pumps and engineered process-vacuum solutions.
Relevant Products: Conventional Roots vacuum pumps, air-cooled Roots vacuum pumps, Roots-based vacuum units, and process-vacuum equipment.
Why Consider Bozhong: Bozhong separates its Roots offering into standard and air-cooled designs and publishes a particularly broad pumping-speed range. Its air-cooled design introduces cooling gas into the pump chamber to control rotor and housing temperature during operation at higher pressure differential.
Another useful distinction is the availability of different wetted-material or surface-treatment options within its Roots range, which may be relevant when a project involves organic solvents, condensable gases, or corrosive media. Final material compatibility still needs to be confirmed for the actual process.
Best Suited For: Reaction vacuum, evaporation, distillation, solvent recovery, vacuum drying, adsorption/desorption, exhaust-gas treatment, central vacuum systems, and projects requiring high pumping capacity.
Before Purchasing: Confirm the actual air-cooled model, required materials or internal coating, seal design, permissible inlet temperature, vapor and liquid carryover protection, differential-pressure limits, cooling-gas arrangement, and whether a liquid ring or dry backing pump should be incorporated into the system.
7. Lvsong / Elm Vacuum
Website: https://www.lvsongglobal.com/
Supply Model: China vacuum-pump and complete vacuum-system manufacturer operating within the Lvsong group.
Relevant Products: ZJQ-type Tri-lobe Gas-Cooled Roots Vacuum Pumps, conventional ZJ Roots pumps, dry screw pumps, liquid ring pumps, multi-level Roots systems, and complete vacuum units.
Why Consider Lvsong / Elm Vacuum: The company publishes a dedicated ZJQ-type tri-lobe gas-cooled Roots product rather than grouping it under a generic Roots category. Its broader vacuum portfolio also makes it possible to evaluate different backing-pump combinations and packaged systems.
This supplier is particularly relevant when the buyer needs high pumping capacity and wants the gas-cooled Roots stage to be engineered together with the remaining vacuum equipment.
Best Suited For: Large industrial vacuum installations, chemical processing, vacuum units, Roots-dry combinations, Roots-liquid ring packages, and buyers requiring customized skid integration.
Before Purchasing: Confirm the exact ZJQ model and published duty point rather than selecting solely from maximum rated flow. Buyers should also confirm motor sizing, return-gas configuration, operating pressure, backing-pump capacity, required system redundancy, control panel scope, instrumentation, and installation footprint.
8. SOUZ Vacuum
Website: https://www.souzvac.com/
Supply Model: China vacuum-pump manufacturer and system supplier offering multiple Roots pump configurations.
Relevant Products: Gas-Circulation-Cooled Roots Vacuum Pumps, Air-Cooled Roots Vacuum Pumps, standard Roots pumps, dry Roots systems, chemical Roots vacuum systems, and other industrial vacuum equipment.
Why Consider SOUZ Vacuum: SOUZ is one of the more directly relevant suppliers in this list because it separately offers both gas-circulation-cooled and air-cooled Roots pump products. Its gas-circulation-cooled design is positioned for continuous operation under high differential pressure and can be considered either as an individual pump or as part of a Roots-based vacuum system.
SOUZ also markets dry Roots vacuum systems for oil and gas or chemical applications, giving buyers another option when system cleanliness and process-vapor handling are important.
Best Suited For: Chemical production, oil and gas processes, vacuum distillation, concentration, evaporation, drying, metallurgy, coating, vacuum heat treatment, and other industrial processes requiring high Roots pumping capacity.
Before Purchasing: Determine whether the duty requires the ZJQ gas-circulation design or another air-cooled/bypass Roots configuration. Confirm allowable differential pressure, working pressure, backing pump, seal type, gas return connection, cooling requirements, process temperature, solvent compatibility, and whether the quoted system includes instrumentation and control.
9. FORYOU Pump
Website: https://www.foryoupump.com/
Supply Model: China industrial vacuum-pump manufacturer producing liquid ring, Roots, screw, and packaged vacuum equipment.
Relevant Products: FORYOU Air-Cooled Roots Vacuum Pumps, conventional Roots pumps, Roots-liquid ring vacuum units, screw vacuum equipment, and industrial vacuum packages.
Why Consider FORYOU Pump: FORYOU publishes a dedicated ZJQ air-cooled Roots series designed to operate under higher pressure differential and compression ratio than a conventional Roots booster. The company also provides Roots-liquid ring packages, allowing buyers to consider the booster and backing stage together.
Its air-cooled Roots range is therefore particularly relevant where continuous operation at relatively high inlet pressure is important and the buyer wants a manufacturer able to provide both the Roots stage and supporting process-vacuum equipment.
Best Suited For: Chemical, pharmaceutical, environmental, petrochemical, industrial wastewater, evaporation, drying, and general process-vacuum projects.
Before Purchasing: Confirm the operating pressure at which the quoted motor and cooler are sized because both can depend on actual pressure differential. Also confirm gas temperature, duty cycle, process compatibility, required ultimate pressure, backing-pump arrangement, cooler water requirement, seal configuration, and site utilities.
10. Mibay Vacuum
Website: https://www.mbvacuum.com/
Supply Model: Vacuum-equipment manufacturer and technical supplier offering pumps, replacement equipment, parts, and engineering selection support.
Relevant Products: ZJQ Gas-Circulation-Cooled Roots Vacuum Pumps, ZJP Roots boosters, ZJ Roots pumps, dry screw pumps, rotary piston pumps, rotary vane pumps, and supporting vacuum equipment.
Why Consider Mibay Vacuum: Mibay publishes one of the broader ZJQ lineups among the suppliers reviewed, with multiple gas-circulation-cooled Roots models spanning small and very large pumping capacities. The company positions the ZJQ series specifically for prolonged high-differential-pressure operation.
Mibay can also be useful to buyers dealing with existing vacuum installations because its product offering includes cross-reference, replacement, repair, and technical-support services in addition to new equipment.
Best Suited For: Vacuum metallurgy, heat treatment, coating, drying, chemical processing, equipment replacement projects, and buyers comparing a broad range of Roots booster capacities.
Before Purchasing: Confirm whether the proposed model is a new system selection or a replacement for an installed pump. For replacement projects, provide the original nameplate, flange dimensions, required pumping speed, allowable differential pressure, motor information, cooling-gas connection, backing-pump data, controls, installation dimensions, and process conditions.
Gas Cooled Roots Vacuum Pump Manufacturer Comparison
| Manufacturer | Relevant Gas-Cooled Product | Best Fit | Key Point to Confirm |
|---|---|---|---|
| DV VACUUM | Circulatory Gas Cooled Roots Vacuum Pump | Customized industrial process vacuum | Pump-only vs complete vacuum system |
| Pfeiffer Vacuum | OktaLine G | Global industrial and engineered vacuum projects | Current model, certification and system configuration |
| EVP Vacuum | ZJQ Air-Cooled Roots Vacuum Pump | Standalone pumps and Roots-liquid ring systems | Backing-pump and operating-pressure selection |
| Huacheng | ZJQ Air-Cooled Roots Pump | Large industrial Roots and liquid-ring packages | External cooler and gas-return arrangement |
| Boke Vacuum | ZJQ and multi-stage gas-circulation systems | Chemical and multi-stage process vacuum | Number of stages and material compatibility |
| Bozhong | Air-Cooled Roots Vacuum Pump | High-capacity and process-vapor applications | Materials, coatings and vapor handling |
| Lvsong / Elm Vacuum | ZJQ Tri-lobe Gas-Cooled Roots Pump | Large customized vacuum systems | Duty-point and complete-system sizing |
| SOUZ Vacuum | Gas-Circulation / Air-Cooled Roots Pumps | Chemical, oil & gas and industrial vacuum | Correct Roots configuration for the duty |
| FORYOU Pump | ZJQ Air-Cooled Roots Vacuum Pump | Process vacuum and Roots-liquid ring systems | Motor and cooler sizing at actual pressure differential |
| Mibay Vacuum | ZJQ Gas-Circulation-Cooled Roots Pump | Wide-capacity selection and replacement projects | Performance and dimensional compatibility |
How to Choose a Gas Cooled Roots Vacuum Pump Manufacturer
Comparing manufacturers only by maximum pumping speed or motor power can lead to the wrong selection. A gas-cooled Roots pump must operate as part of the complete process, so buyers should evaluate the supplier against the actual duty point and gas load.
1. Confirm that the pump is genuinely gas cooled.
A conventional Roots booster, bypass Roots pump, and gas-circulation-cooled Roots pump are not automatically interchangeable. Ask the manufacturer to identify the cooling-gas path, applicable model series, allowable pressure differential, and operating-pressure range.
2. Define whether a backing pump is required.
Some gas-cooled Roots designs can operate across higher inlet-pressure ranges than conventional boosters, but the final system may still require a liquid ring, dry screw, rotary vane, rotary piston, or another Roots stage to achieve the required vacuum.
3. Provide the real process gas composition.
Air performance alone is not enough for chemical applications. Solvents, water vapor, corrosive gases, dust, particles, polymerizable material, or liquid carryover can affect materials, coatings, sealing, purge requirements, condensation control, and pump life.
4. Compare performance at the operating pressure.
The maximum rated pumping speed does not show how a system will perform at your actual process pressure. Request performance curves and verify the expected capacity, motor load, compression ratio, and allowable differential pressure at the intended duty point.
5. Confirm system responsibility.
For a complete vacuum skid, define who is responsible for the Roots pump, backing pump, cooler, separator, condenser, piping, valves, instruments, PLC, interlocks, base frame, electrical equipment, FAT, commissioning, and process-performance guarantee.
Information to Provide Before Requesting a Quote
To receive a meaningful quotation, prepare the following information:
- Required pumping speed or process gas flow
- Normal operating pressure
- Starting pressure
- Target ultimate pressure
- Process gas composition
- Condensable vapor and solvent load
- Gas inlet temperature
- Corrosive components
- Dust or particle content
- Expected operating hours and duty cycle
- Existing backing pump, if any
- Cooling-water temperature and availability
- Voltage and frequency
- Hazardous-area classification, if applicable
- Required materials, coatings, or sealing arrangement
- Standalone pump or complete skid requirement
- Installation footprint and piping restrictions
- Required documentation, inspection, and certification
FAQs - Gas Cooled Roots Vacuum Pump Manufacturers
1. What is a gas cooled Roots vacuum pump?
A gas cooled Roots vacuum pump uses recirculated or introduced cooling gas to remove compression heat from the pump chamber, rotors, or housing. This allows the Roots principle to be used across higher pressure differential than a conventional uncooled Roots booster, depending on the specific design.
2. Is an air-cooled Roots pump the same as a gas-circulation-cooled Roots pump?
Manufacturers do not always use the terminology in exactly the same way. Some products use atmospheric or process gas for cooling, while others use an external cooler and dedicated gas-return circuit. Buyers should therefore compare the actual cooling arrangement rather than relying only on the product name.
3. Can a gas cooled Roots pump operate without a backing pump?
Some designs can operate alone over a specified pressure range or discharge toward atmospheric pressure, while other configurations are intended to work with backing pumps. The allowable operating range must be checked against the manufacturer's performance data.
4. What backing pump can be used with a gas cooled Roots pump?
Common options include liquid ring vacuum pumps, dry screw vacuum pumps, rotary vane pumps, rotary piston pumps, and additional Roots stages. Selection depends on process gas, condensable load, corrosion risk, target vacuum, contamination requirements, energy use, and maintenance strategy.
5. Why use gas cooling instead of a conventional Roots booster?
Gas cooling can help control temperature during operation at higher compression ratios or differential pressures. This can expand the useful pressure range of a Roots pump and may simplify some system configurations. The actual advantage depends on the model and process duty.
6. Are gas cooled Roots pumps suitable for solvent recovery?
They can be used in solvent-containing vacuum processes, but suitability depends on solvent properties, concentration, condensation conditions, materials, seal design, temperature control, explosion risk, and exhaust treatment. The manufacturer should review the complete process data before selection.
7. Can they handle corrosive gases?
Only when the selected pump configuration, materials, coatings, seals, purge strategy, and operating temperature are compatible with the specific gas. Do not assume that every model in a manufacturer's Roots range has the same corrosion resistance.
8. What is the most important specification when comparing manufacturers?
There is no single specification. Buyers should compare pumping capacity at the actual operating pressure, allowable differential pressure, gas temperature, cooling method, materials, backing-pump requirements, motor load, seal arrangement, process compatibility, and system-engineering responsibility.
Which Gas Cooled Roots Vacuum Pump Supplier Should You Contact?
The most suitable manufacturer depends on how the gas-cooled Roots pump will be used. Buyers requiring an established international vacuum brand and standardized global product platform may evaluate suppliers such as Pfeiffer Vacuum. Buyers requiring dedicated ZJQ-style gas-cooled Roots equipment have several specialized manufacturers to compare, including EVP, Huacheng, Boke, Bozhong, Lvsong, SOUZ, FORYOU, and Mibay.
For buyers looking for factory-direct industrial pumps combined with customized process-vacuum engineering, DV VACUUM can be considered for Circulatory Gas Cooled Roots Vacuum Pumps and complete Roots-based vacuum systems.
Rather than requesting a quotation with only a pump model or pumping-speed target, send the actual process conditions. DV VACUUM can use the required pressure, pumping capacity, process gas, vapor load, temperature, corrosion conditions, available utilities, backing-pump preference, installation space, and control requirements to discuss an appropriate pump or vacuum-system configuration.
