Are you searching for reliable oil-free dry screw vacuum pumps from China for chemical, pharmaceutical, solvent recovery, or clean industrial processes? Dry screw vacuum pumps use non-contacting screw rotors and operate without oil or sealing liquid in the compression chamber, helping reduce process contamination and simplify vacuum handling in applications where oil-sealed or liquid ring technologies may be less suitable.
To help international process engineers, equipment builders, and EPC contractors compare suitable suppliers, this guide reviews the top 7 China dry screw vacuum pump manufacturers. The comparison focuses on screw pump design, available pump ranges, process suitability, system integration capabilities, and the technical information buyers should confirm before placing an order.
Quick Navigation
- DV VACUUM
- Shandong Boke Vacuum Technology Co., Ltd.
- Ningbo Baosi Energy Equipment Co., Ltd.
- Sanmen Tuozhan Vacuum Equipment Co., Ltd. (DVE Vacuum)
- Shanghai EVP Vacuum Technology Co., Ltd.
- Taizhou Foryou Machinery Co., Ltd. (For You Pump)
- Shandong Kaien Vacuum Technology Co., Ltd.
1. DV VACUUM
Headquarters & Base: Shanghai / Anhui, China
Dry Screw Technologies: Constant-pitch and variable-pitch dry screw vacuum pumps, available as standalone pumps or as part of engineered vacuum systems.
Why Consider DV VACUUM: DV VACUUM focuses on process vacuum applications including chemical processing, pharmaceuticals, solvent recovery, vacuum drying, and other industrial processes. Corrosion-resistant configurations, including Hastelloy diffused coating options, are available for selected process requirements.
Best Suited For: Chemical processing, pharmaceutical production, solvent recovery, vacuum drying, distillation, and projects requiring factory-direct pump selection and customized vacuum system integration.
Before Purchasing: Provide the complete gas composition, vapor and condensable load, operating pressure, required pumping speed, suction temperature, cooling conditions, and any corrosion or hazardous-area requirements for model-specific confirmation.
2. Shandong Boke Vacuum Technology Co., Ltd.
Headquarters & Base: Zibo, Shandong, China
Core Screw Technologies: VDP series variable-pitch dry screw vacuum pumps, Roots vacuum pumps, gas-cooled Roots pumps, liquid ring pumps, and combined vacuum units.
Engineering & Technical Strengths: Boke Vacuum develops and manufactures a broad range of industrial vacuum equipment. Its published product portfolio includes independently developed VDP variable-pitch dry screw vacuum pumps alongside Roots and liquid ring technologies, giving process buyers several options for complete vacuum system configuration.
Best Suited For: Chemical, pharmaceutical, petrochemical, metallurgy, and other process-industry buyers looking for variable-pitch dry screw pumps and combined vacuum systems.
Before Purchasing: Confirm the required pump model, pumping curve at the actual operating pressure, cooling requirements, allowable gas temperature, material or coating configuration, and whether a standalone pump or complete vacuum unit is required.
3. Ningbo Baosi Energy Equipment Co., Ltd.
Headquarters & Base: Ningbo, Zhejiang, China
Core Screw Technologies: Industrial dry screw vacuum pumps together with Roots, rotary vane, and scroll vacuum pump technologies.
Engineering & Technical Strengths: Baosi operates as a large precision equipment manufacturer with a broad vacuum pump portfolio. Its manufacturing background and multiple vacuum technologies make it relevant to OEMs and industrial users looking for standardized pump models and repeat-volume procurement.
Best Suited For: Large industrial users and equipment manufacturers seeking standardized dry screw vacuum pumps from a manufacturer with broad machining and vacuum equipment capabilities.
Before Purchasing: Compare the available screw pump series by actual pumping speed, ultimate pressure, motor power, cooling method, inlet and outlet connections, process compatibility, and maintenance requirements.
4. Sanmen Tuozhan Vacuum Equipment Co., Ltd. (DVE Vacuum)
Headquarters & Base: Taizhou, Zhejiang, China
Core Screw Technologies: Dry screw vacuum pumps and combined industrial vacuum systems using Roots, screw, and liquid ring technologies.
Engineering & Technical Strengths: DVE Vacuum focuses on industrial vacuum equipment and complete pump combinations. Its product positioning is relevant to buyers that need a dry screw pump as part of a broader process vacuum package rather than only purchasing a standalone pump.
Best Suited For: Industrial contractors, equipment builders, and process plants seeking general-purpose dry screw pumps or combined Roots-screw vacuum systems.
Before Purchasing: Ask for the specific dry screw model datasheet, performance curve, materials, seal arrangement, cooling requirement, and details of any combined Roots or process system offered for the application.
5. Shanghai EVP Vacuum Technology Co., Ltd.
Headquarters & Base: Shanghai, China
Core Screw Technologies: EDSE constant-pitch dry screw vacuum pumps, EDSV variable-pitch dry screw vacuum pumps, and combined industrial vacuum systems.
Engineering & Technical Strengths: EVP publishes both equal-pitch and variable-pitch dry screw pump series for chemical, pharmaceutical, solvent recovery, coating, petroleum, and semiconductor-related applications. Its catalog provides multiple capacities and allows buyers to compare different screw geometries according to operating conditions.
Best Suited For: International distributors, equipment builders, and industrial buyers looking for export-oriented dry screw pumps with a relatively broad published model range.
Before Purchasing: Do not assume the variable-pitch version is automatically better for every application. Final selection should be based on the actual pressure range, gas load, thermal conditions, and process requirements.
6. Taizhou Foryou Machinery Co., Ltd. (For You Pump)
Headquarters & Base: Taizhou, Zhejiang, China
Core Screw Technologies: Dry screw vacuum pumps, liquid ring vacuum pumps, Roots pumps, rotary vane pumps, and industrial vacuum systems.
Engineering & Technical Strengths: Foryou offers dry screw pumps together with other industrial vacuum technologies, which can be useful when buyers need to compare screw pumps with Roots or liquid ring combinations.
Best Suited For: General industrial users, equipment manufacturers, and process plants seeking Chinese-made dry screw pumps with access to additional vacuum technologies.
Before Purchasing: Confirm whether the required model is suitable for the specific solvent, vapor, powder, or corrosive gas load and request the applicable material, coating, cooling, and purge recommendations.
7. Shandong Kaien Vacuum Technology Co., Ltd.
Headquarters & Base: Jinan, Shandong, China
Core Screw Technologies: Air-cooled dry screw vacuum pumps, water-cooled dry screw vacuum pumps, variable-pitch screw pumps, Roots pumps, and screw-Roots vacuum units.
Engineering & Technical Strengths: Kaien offers dry screw pump ranges covering compact air-cooled models and larger water-cooled units, together with variable-pitch designs and combined screw-Roots systems.
Best Suited For: Laboratories, industrial equipment manufacturers, metallurgy projects, and general process applications requiring dry screw pumps across different capacity ranges.
Before Purchasing: Check whether the proposed model is air-cooled or water-cooled, constant-pitch or variable-pitch, and verify pumping speed, ultimate pressure, motor power, noise level, cooling demand, and process compatibility.
Variable-Pitch vs. Constant-Pitch Dry Screw Vacuum Pumps
Constant-pitch and variable-pitch screw pumps use different internal compression strategies. Neither design should be selected solely from a general claim that one is always more efficient or more reliable; the correct choice depends on operating pressure, gas load, thermal behavior, process chemistry, and the manufacturer's specific rotor design.
- Variable-Pitch Screw Pumps: The screw geometry changes along the rotor length, allowing gas compression to be distributed differently through the pump. Depending on the specific design, this can help manage internal compression, power consumption, or temperature under certain operating conditions.
- Constant-Pitch Screw Pumps: These use a consistent screw pitch through the pumping section and remain widely used in industrial dry vacuum applications.
- Do Not Compare Rotor Pitch Alone: Pumping speed, ultimate pressure, allowable inlet pressure, motor load, cooling capacity, rotor clearances, purge configuration, materials, and process gas characteristics can be equally important.
- Corrosion Protection: When handling acids, solvents, moisture, or reactive gases, provide the full gas composition and ask the manufacturer to confirm the appropriate material or coating configuration.
What Should Buyers Compare Between Dry Screw Pump Manufacturers?
- Actual Operating Pressure: Compare pumping curves across the normal operating range, not only ultimate vacuum.
- Process Gas Compatibility: Identify solvents, acids, water vapor, powders, polymerizing materials, and other contaminants.
- Thermal Management: Confirm cooling requirements and allowable operating conditions.
- Purge Requirements: Confirm whether purge gas is required for the selected model and process.
- System Components: Condensers, knockout vessels, filters, Roots boosters, exhaust treatment, controls, and instrumentation may be required.
- Hazardous-Area Requirements: Ask exactly which components or systems carry the required certification rather than assuming an explosion-proof motor means the complete package is certified.
Frequently Asked Questions - Sourcing Dry Screw Vacuum Pumps from China
What technical parameters are needed for a precise dry screw pump quote?
Provide the required pumping speed, normal operating pressure, target ultimate pressure, complete process gas composition, expected condensable or solvent load, suction temperature, cooling-water conditions, operating duty, electrical standard, and any material compatibility or hazardous-area requirements.
Can Chinese dry screw pump manufacturers build complete vacuum skids?
Many industrial vacuum manufacturers can supply systems in addition to standalone pumps. Depending on the application, a package may include a dry screw pump, Roots booster, condenser, knockout vessel, piping, instrumentation, and controls.
How should I verify quality before shipment?
Request the technical datasheet and agreed factory test documentation for the purchased model. Depending on the project, this may include ultimate-pressure testing, pumping performance verification, vibration or noise inspection, electrical checks, leak testing, and confirmation of specified materials or coatings.
Looking for an Engineered Dry Screw Vacuum Package?
Selecting a dry screw vacuum pump requires more than comparing nominal pumping speed. DV VACUUM supplies constant-pitch and variable-pitch dry screw vacuum pumps and develops vacuum systems around different industrial process requirements.
For a more accurate proposal, send the application team your required pumping speed, operating vacuum, complete gas composition, vapor or condensable load, suction temperature, cooling conditions, electrical standard, and any corrosion or hazardous-area requirements.
