Are you looking for reliable oil-sealed rotary vacuum pumps from China? In industrial sourcing, the category covers both oil-lubricated rotary vane vacuum pumps (single-stage and two-stage) and heavy-duty rotary piston vacuum pumps. These pumps remain widely used in vacuum packaging, thermoforming, CNC workholding, refrigeration servicing, metallurgy, laboratory equipment, transformer processing, and as backing pumps for higher-vacuum systems.
To help international procurement teams and equipment builders compare suitable suppliers, this guide reviews 10 China oil-sealed rotary vacuum pump manufacturers. The list covers heavy-duty single-stage industrial pumps, two-stage high-vacuum vane models, rotary piston options, compact refrigeration pumps, and manufacturers offering complete vacuum system integration.
Quick Navigation
- DV VACUUM
- Ningbo Baosi Energy Equipment Co., Ltd.
- EVP Vacuum
- Taizhou HBS Vacuum Equipment Co., Ltd. (HBS Pump)
- Shanghai Puxu Vacuum Pump Co., Ltd.
- Zhejiang Yingpa Electromechanical Co., Ltd. (InPowerVac)
- Beijing Super Q Technology (BJSUPERQ)
- Souz Vacuum
- Zhongtian Pumps (Nantong Zhongtian)
- DVE Vacuum
1. DV VACUUM
Headquarters & Base: Shanghai / Anhui, China
Primary Technologies: Single-stage oil-sealed rotary vane vacuum pumps, two-stage rotary vane vacuum pumps, dry screw and liquid ring pumps, and engineered vacuum systems combining rotary vane backing pumps with Roots boosters.
Engineering & Technical Strengths: DV VACUUM focuses on industrial vacuum pumps and integrated vacuum systems configured around actual operating conditions—medium, pressure, pumping speed, and plant utilities. Its rotary vane product range can be used as standalone vacuum equipment or incorporated into Roots-assisted packages where higher pumping speed or deeper operating vacuum is required.
Best Suited For: Equipment manufacturers and industrial users in packaging, CNC processing, vacuum drying, general manufacturing, and process applications requiring factory-direct pump selection and customized vacuum system integration.
Before Purchasing: Confirm required pumping speed, normal operating pressure, target ultimate pressure, process gas composition, vapor load, operating temperature, motor specification, and whether a standalone pump or complete Roots-vane system is required.
2. Ningbo Baosi Energy Equipment Co., Ltd.
Headquarters & Base: Ningbo, Zhejiang, China
Primary Technologies: Single-stage oil rotary vane vacuum pumps, two-stage oil-sealed rotary vane pumps, Roots pumps, dry screw pumps, and dry scroll pumps.
Engineering & Technical Strengths: Baosi offers one of the broader vacuum pump portfolios among Chinese manufacturers, covering both oil-sealed and dry vacuum technologies. Its rotary vane range includes single-stage industrial pumps and two-stage models intended for applications requiring a lower ultimate pressure.
Best Suited For: Industrial OEMs and larger-volume purchasers seeking standardized rotary vane pump models from a manufacturer with multiple vacuum technologies under one product portfolio.
Before Purchasing: Compare single-stage and two-stage models by actual pumping curve, operating pressure, inlet connection, motor configuration, cooling arrangement, and maintenance requirements.
3. EVP Vacuum
Headquarters & Base: Shanghai, China
Primary Technologies: Industrial single-stage rotary vane pumps, direct-drive two-stage rotary vane pumps, Roots pumps, and combined vacuum pump systems.
Engineering & Technical Strengths: EVP maintains a broad export-oriented vacuum equipment catalog with application support and customization. Its rotary vane offering covers both general industrial pumping and smaller two-stage pumps used where lower ultimate pressure is required, while Roots-assisted combinations are available for applications needing additional pumping capacity.
Best Suited For: International distributors, equipment builders, and general industrial users seeking standard rotary vane pump models and configured vacuum packages.
Before Purchasing: Identify the exact mechanism, curve, and oil grade. Confirm whether the application requires continuous industrial operation, deeper two-stage vacuum performance, or a Roots-assisted system rather than selecting solely by nominal pumping speed.
4. Taizhou HBS Vacuum Equipment Co., Ltd. (HBS Pump)
Headquarters & Base: Taizhou, Zhejiang, China
Primary Technologies: Compact and portable rotary vane vacuum pumps for refrigeration, HVAC servicing, laboratory work, and related evacuation applications.
Engineering & Technical Strengths: HBS is more relevant to buyers looking for compact rotary vane equipment than to purchasers of large centralized industrial vacuum systems. Its product positioning is oriented toward portable evacuation, refrigeration service, and smaller vacuum applications.
Best Suited For: HVAC/R service companies, refrigeration equipment distributors, automotive air-conditioning service businesses, and buyers requiring compact portable vacuum pumps.
Before Purchasing: Confirm refrigerant compatibility, motor and electrical specifications, required ultimate vacuum, pumping speed, inlet connection, and any safety requirements associated with the refrigerant being handled.
5. Shanghai Puxu Vacuum Pump Co., Ltd.
Headquarters & Base: Shanghai, China
Primary Technologies: XD series single-stage rotary vane vacuum pumps, 2X and 2XZ two-stage rotary vane vacuum pumps, water ring vacuum pumps, and vacuum units.
Engineering & Technical Strengths: Shanghai Puxu, also associated with Shanghai Pujiang Vacuum Pump Manufacturing, specializes in rotary vane vacuum pumps and vacuum units. Its published product range covers both larger single-stage XD industrial pumps and conventional two-stage 2X/2XZ pumps.
Best Suited For: General industrial users, equipment manufacturers, and replacement projects requiring conventional single-stage or two-stage Chinese rotary vane pump designs.
Before Purchasing: Determine whether the application needs a high-throughput single-stage pump or a two-stage pump for lower ultimate pressure, and verify the required pumping speed, flange connection, motor voltage, and cooling configuration.
6. Zhejiang Yingpa Electromechanical Co., Ltd. (InPowerVac)
Headquarters & Base: Zhejiang, China
Primary Technologies: Oil-sealed single-stage and two-stage rotary vane vacuum pumps, dry screw vacuum pumps, Roots vacuum pumps, and complete vacuum units.
Engineering & Technical Strengths: Operating under Zhejiang Yingpa and the InPowerVac brand, the company develops and manufactures several vacuum pump technologies and operates its own machining and production equipment. This broader product range makes it relevant where buyers want to compare an oil-sealed rotary vane solution with dry or Roots-based alternatives from the same supplier.
Best Suited For: Industrial equipment manufacturers and process users requiring rotary vane pumps together with access to broader vacuum system engineering and alternative pump technologies.
Before Purchasing: Request the full series and model curve. Confirm whether an oil rotary vane pump is the best fit for the gas stream, particularly where the application contains significant moisture, solvents, powders, or other process contaminants.
7. Beijing Super Q Technology (BJSUPERQ)
Headquarters & Base: Beijing, China
Primary Technologies: TRP double-stage rotary vane backing pumps, dry pumps, vacuum valves, KF/ISO vacuum components, vacuum gauges, and vacuum chambers.
Engineering & Technical Strengths: BJSUPERQ is oriented toward scientific, laboratory, and vacuum-component applications. Its TRP double-stage rotary vane pumps can be considered as backing pumps where users also require vacuum fittings, valves, gauges, chambers, or other components for a complete experimental vacuum setup.
Best Suited For: Universities, research laboratories, scientific instrument builders, coating equipment developers, and smaller high-vacuum systems.
Before Purchasing: Ask for current TRP series data and oil-sealing specifications. Verify required foreline pressure, pumping speed, flange standard, vibration and noise requirements, and compatibility with downstream turbomolecular or high-vacuum pumps.
8. Souz Vacuum
Headquarters & Base: China
Primary Technologies: SV single-stage and 2XZ/2X two-stage oil-sealed rotary vane pumps, dry vacuum pumps, liquid ring pumps, and Roots-based vacuum units.
Engineering & Technical Strengths: Souz publishes clearly named oil-sealed rotary vane families together with dry and liquid ring pumps and several Roots-based system combinations. Its identifiable SV, 2XZ, and 2X model families support direct technical comparisons across standalone industrial pumping and foreline backing duties.
Best Suited For: Buyers comparing named single-stage (SV) and two-stage (2XZ/2X) oil-sealed rotary vane ranges for standalone evacuation or booster backing applications.
Before Purchasing: Request the full model suffix, performance curve, and oil specification. Compare stage count, drive arrangement, gas ballast capability, and exhaust oil-mist filtration at your required working pressure.
9. Zhongtian Pumps (Nantong Zhongtian)
Headquarters & Base: Nantong, Jiangsu, China
Primary Technologies: XMV single-stage rotary vane pumps, 2XZ direct-coupled two-stage pumps, 2X belt-driven two-stage rotary vane pumps, and LG/LGB dry screw and Roots equipment.
Engineering & Technical Strengths: Nantong Zhongtian publishes distinct rotary vane ranges covering single-stage industrial models (XMV), two-stage direct-coupled models (2XZ), and two-stage belt-driven designs (2X), alongside dry screw and Roots boosters for OEM and integrated system offerings.
Best Suited For: Industrial buyers evaluating oil-lubricated rotary vane designs across multiple drive arrangements (direct-coupled vs. belt-driven) and footprint configurations.
Before Purchasing: Compare the exact model code, footprint, and motor supply rather than treating a family prefix as a complete specification. Obtain the corresponding pumping curve and manual, and agree on oil and maintenance provisions.
10. DVE Vacuum
Headquarters & Base: China
Primary Technologies: Oil-sealed rotary piston vacuum pumps, rotary vane vacuum pumps, Roots boosters, and variable-pitch dry screw pumps.
Engineering & Technical Strengths: DVE publishes both rotary piston and rotary vane pumps alongside Roots boosters and dry screw systems. Its rotary piston equipment is engineered for heavy industrial standalone and backing applications, where appropriate inlet protection is configured for gas streams containing vapor, dust, or harsh chemicals.
Best Suited For: Heavy industrial, metallurgical, and vacuum furnace applications needing explicit mechanism selection between rotary piston and rotary vane designs.
Before Purchasing: Ask explicitly whether the quoted offer is a rotary piston or rotary vane construction. Specify vapor and dust loads upfront, and request inlet accessories, cooling water requirements, oil grade, and factory acceptance criteria.
Single-Stage Vane, Two-Stage Vane, or Rotary Piston: How to Choose?
Because "oil-sealed rotary vacuum pump" covers multiple mechanisms, selecting the right construction depends on required operating pressure, pumping speed, duty cycle, process gas, and the amount of moisture, dust, or condensable vapor entering the pump.
- Single-Stage Rotary Vane Pumps: Commonly selected for industrial applications where relatively high pumping speed and continuous operation in the low-to-medium vacuum range are more important than achieving the deepest possible ultimate pressure. Typical uses include packaging, thermoforming, CNC workholding, general vacuum handling, and centralized vacuum systems.
- Two-Stage Rotary Vane Pumps: Two compression stages in series achieve a lower ultimate pressure than a comparable single-stage design. They are widely used in laboratories, refrigeration evacuation, scientific equipment, vacuum coating support, and as foreline backing pumps for higher-vacuum systems. Always compare the actual pumping curve and measurement conditions rather than assuming one fixed pressure range for all two-stage pumps.
- Rotary Piston Vacuum Pumps: Built for heavier industrial duties (such as metallurgy, vacuum furnaces, and impregnation) where wider internal clearances and rugged construction are favored. Verify cooling water supply, foundation mounting, vibration isolation, and inlet dust filtration before ordering.
- Process Vapor Warning: Water vapor, solvents, acids, and other condensable process gases can contaminate vacuum pump oil and reduce pump performance. Gas ballast may improve light vapor handling in suitable applications, but processes with heavy solvent or corrosive vapor loads may require inlet condensers, traps, or a dry screw pump.
What Should Buyers Compare Between Oil Rotary Pump Manufacturers?
- Mechanism & Stages: Require the quotation to specify single-stage rotary vane, two-stage rotary vane, or rotary piston construction. Do not compare unlike mechanisms by nominal displacement alone.
- Operating Pressure & Curve: Compare the normal working pressure and actual pumping speed across your process pressure range, not only the published ultimate vacuum or free-air displacement.
- Gas, Vapor & Oil Compatibility: Disclose water vapor, solvents, acids, dust, temperature, and liquid carryover before selecting the pump. Confirm the approved lubricant grade, gas ballast rating, and inlet separation hardware.
- Duty Cycle & Exhaust Handling: A compact portable service pump and a continuous-duty industrial rotary pump are not interchangeable. Define exhaust routing, oil-mist filtration, electrical standards, and cooling clearances.
- Factory Origin & Maintenance Support: Verify whether the quoted unit is manufactured in-house or sourced. Compare oil requirements, exhaust filter replacement, vane and seal availability, service intervals, and spare-parts support.
- System Integration Scope: If the rotary pump will serve as a backing pump for a Roots booster or high-vacuum system, capacity matching, controls, protection, and package warranty responsibility should be sized and defined together.
Frequently Asked Questions - Sourcing Oil Sealed Rotary Pumps from China
Is an oil-sealed rotary vacuum pump always a rotary vane pump?
No. While oil-lubricated rotary vane pumps are the most common, the sourcing term can also include oil-sealed rotary piston vacuum pumps used in heavier industrial duties. Always ask the supplier to specify the internal mechanism and full model series.
What technical specifications should I provide in an RFQ?
Provide the required pumping speed (m³/h or CFM), normal operating pressure, target ultimate pressure, chamber volume, process gas composition, moisture or dust load, duty cycle, motor voltage and frequency, inlet connection, and whether you require filters, oil mist separation, controls, or a complete Roots-vane vacuum system.
Can Chinese rotary pump manufacturers support replacement projects?
Some manufacturers offer pumps intended for replacement or retrofit applications, but buyers should never assume dimensional or performance interchangeability based on a similar model number alone. Before ordering, compare mounting dimensions, inlet and outlet connections, motor specifications, pumping curves, cooling method, controls, and maintenance access with the existing pump.
How should I evaluate the reliability and factory test of an oil rotary pump?
Ask for the manufacturer's performance curve, technical datasheet, and factory acceptance test basis. Compare pumping speed across the intended pressure range, rated ultimate pressure, operating temperature limits, noise data, oil and exhaust filtration arrangement, and availability of spare parts. For continuous production equipment, serviceability and spare-parts availability are as important as the initial purchase price.
When should I consider a dry screw pump instead?
A dry screw vacuum pump is worth evaluating when the process requires strictly oil-free compression or involves heavy solvent, acid, or condensable process gases that would cause frequent emulsification and contamination of rotary pump oil. The final choice should weigh gas composition, condensable load, corrosion risk, required pressure, pumping speed, and total lifecycle cost.
Looking for a Rotary Vane Pump or Complete Vacuum System?
Whether you need a standalone oil-sealed rotary vane vacuum pump or an engineered Roots-vane combination for higher pumping capacity, DV VACUUM provides factory-direct vacuum pump supply and customized system integration for industrial applications.
DV VACUUM is particularly relevant for buyers who need more than a catalog pump and want the backing pump, Roots booster, controls, inlet filters, oil-mist separators, piping, and other system components selected around actual process conditions.
For a more accurate quotation, send the application team your required pumping speed, normal operating vacuum, target ultimate pressure, process gas composition, vapor load, duty cycle, electrical standard, and existing equipment information if the project is a replacement or retrofit.
