Corrosion resistance is a relationship between the equipment construction and a defined process medium. Gas composition, condensate, concentration, temperature, solids and cleaning conditions can all affect a dry screw pump. A coating or chemical-duty label should therefore be supported by an application review for the actual operating envelope.
The eight companies below come from the supplied directory and publish dry screw equipment, chemical applications or configurable protection. The order supports technical sourcing discussions rather than a market-share ranking. It does not imply that every standard model from each company is suitable for every corrosive process.
Quick takeaway: Edwards publishes a chemical dry screw range, while DV Vacuum, Vacculex and EVP identify specific protection options. Compare their complete model proposals, including seals, utilities and operating procedures, rather than selecting a pump by a corrosion-resistant claim alone.
- Edwards Vacuum
- DV Vacuum
- Vacculex
- EVP Vacuum Technology
- Leybold
- VPS / Weipengsheng (Shandong)
- Pfeiffer Vacuum+Fab Solutions
- GOFLEX
Top 8 Corrosion Resistant Dry Screw Vacuum Pump Manufacturers in 2026: Quick Comparison
| Company | Published Equipment Focus | Material Evidence and Qualification |
|---|---|---|
| Edwards Vacuum | EDS chemical dry screw pumps and industrial dry vacuum equipment | The explicit EDS chemical category provides a focused product starting point; suitability remains tied to the selected build and medium. |
| DV Vacuum | DVS dry screw pumps, Roots boosters and customized industrial vacuum packages | Its named anti-corrosion options support a process-based comparison of pump and protection construction. |
| Vacculex | Screw and Roots pumps, dry vacuum units and process customization | Its chemical application material describes several coatings and alloy options, which need to be assigned to the quoted screw model. |
| EVP Vacuum Technology | Dry screw pumps, vacuum systems and specified surface-treatment options | The dry-screw specification identifies PTFE, PFA and metallic treatments, providing concrete options to investigate for the process. |
| Leybold | DRYVAC and SCREWLINE dry screw technologies; vacuum systems and service | Ask which dry screw series and configuration are appropriate to the actual chemical conditions and cleaning procedure. |
| VPS / Weipengsheng (Shandong) | VPS and HC dry screw pumps, Roots pumps and complete vacuum units | Its chemical and pharmaceutical markets support a dry screw inquiry, with material and sealing details to be established separately. |
| Pfeiffer Vacuum+Fab Solutions | Dry screw, backing and other vacuum pump technologies; integrated equipment | Confirm the dry screw product and chemical envelope rather than treating general backing-pump capability as a corrosion guarantee. |
| GOFLEX | Screw, Roots and other vacuum pumps; OEM/ODM configurations | A customized screw inquiry needs explicit medium compatibility and build evidence, beyond the general OEM offering. |
1. Edwards Vacuum
Website: https://www.edwardsvacuum.com/
Core Technologies: EDS chemical dry screw pumps and industrial dry vacuum equipment
Best Fit: Named dry screw configuration and process compatibility review
Company Overview: Edwards publishes an EDS chemical dry screw range and other industrial vacuum equipment. Its chemical product documentation supports inquiries tied to a defined process medium and operating envelope. Exact materials, protection and utilities should be established for the proposed series and configuration.
Material Evidence: The explicit EDS chemical category provides a focused product starting point; suitability remains tied to the selected build and medium. See Edwards EDS chemical product information.
Buying Tips: Use the chemical dry pump specification to define the offered configuration. Request a process review, relevant construction details and utility and cleaning requirements. Specify corrosion protection explicitly and ask the supplier to identify any proposed alternative separately.
2. DV Vacuum
Website: https://www.dvvacuum.com/
Core Technologies: DVS dry screw pumps, Roots boosters and customized industrial vacuum packages
Best Fit: Industrial process pump and configured protection discussion
Company Overview: DV Vacuum publishes dry screw pumps, Roots boosters and integrated industrial vacuum systems. Its supplied company materials describe in-house production of core series and customization around gas medium, pressure, pumping demand and cooling. Material protection must be assigned to the exact pump and process configuration.
Material Evidence: Its named anti-corrosion options support a process-based comparison of pump and protection construction. See DV Vacuum DVS product information.
Buying Tips: Request the DVS model, protection specification and drawing identifying treated components. Confirm the permitted medium, operating conditions and acceptance evidence for the exact configured pump. Specify corrosion protection explicitly and ask the supplier to identify any proposed alternative separately.
3. Vacculex
Website: https://www.vacculex.com/
Core Technologies: Screw and Roots pumps, dry vacuum units and process customization
Best Fit: Process pump and documented coating-option inquiry
Company Overview: Vacculex describes manufacturing of screw pumps, Roots equipment and dry vacuum units. Its supplied profile presents industrial process applications and vacuum package selection. For a specialty treatment inquiry, establish the specific pump, component construction and manufacturing responsibility in the offer.
Material Evidence: Its chemical application material describes several coatings and alloy options, which need to be assigned to the quoted screw model. See Vacculex chemical application information.
Buying Tips: Ask for the proposed screw model and a material schedule for gas-contact parts. Tie every stated treatment to its components, process limits and test documentation. Specify corrosion protection explicitly and ask the supplier to identify any proposed alternative separately.
4. EVP Vacuum Technology
Website: https://www.evpvacuum.com/
Core Technologies: Dry screw pumps, vacuum systems and specified surface-treatment options
Best Fit: Process pump and documented coating-option inquiry
Company Overview: EVP publishes dry screw pumps, vacuum equipment and system supply, with customization and technical support described in the supplied company profile. Buyers should identify the actual manufacturer and final model and define the scope of supply rather than treating a broad product catalog as a complete technical proposal.
Material Evidence: The dry-screw specification identifies PTFE, PFA and metallic treatments, providing concrete options to investigate for the process. See EVP dry screw pump specification.
Buying Tips: Request a current model specification and the legal manufacturer. Confirm which body, rotor and auxiliary surfaces receive the quoted treatment, and define supplied inspection and service records. Specify corrosion protection explicitly and ask the supplier to identify any proposed alternative separately.
5. Leybold
Website: https://www.leybold.com/
Core Technologies: DRYVAC and SCREWLINE dry screw technologies; vacuum systems and service
Best Fit: Named dry screw configuration and process compatibility review
Company Overview: Leybold publishes industrial dry screw pumps and system solutions. Its DRYVAC and SCREWLINE information provides identifiable models for an application review, including process operation and maintenance. A dry screw portfolio is a starting point; the selected material and any coating need separate model-specific documentation.
Material Evidence: Ask which dry screw series and configuration are appropriate to the actual chemical conditions and cleaning procedure. See Leybold SCREWLINE product information.
Buying Tips: Request a recommendation for the actual process and named pump series. Obtain written material or coating details and the operating, cleaning and maintenance conditions for the offered variant. Specify corrosion protection explicitly and ask the supplier to identify any proposed alternative separately.
6. VPS / Weipengsheng (Shandong)
Website: https://www.vps-vacuum.com.cn/
Core Technologies: VPS and HC dry screw pumps, Roots pumps and complete vacuum units
Best Fit: Named dry screw configuration and process compatibility review
Company Overview: The supplied VPS profile describes dry screw and Roots equipment and packaged vacuum units manufactured within the Weipengsheng group. Its process markets include chemical and pharmaceutical applications. That portfolio supports a process inquiry but does not establish a particular coating or alloy on every model.
Material Evidence: Its chemical and pharmaceutical markets support a dry screw inquiry, with material and sealing details to be established separately.
Buying Tips: Identify the VPS or HC model and ask whether the required protection is available. Obtain a component material list, process compatibility review and documented final configuration. Specify corrosion protection explicitly and ask the supplier to identify any proposed alternative separately.
7. Pfeiffer Vacuum+Fab Solutions
Website: https://www.pfeiffer-vacuum.com/
Core Technologies: Dry screw, backing and other vacuum pump technologies; integrated equipment
Best Fit: Named dry screw configuration and process compatibility review
Company Overview: Pfeiffer publishes several vacuum technologies, including dry screw pumps. Its technical information identifies the role of screw pumps in low- and medium-vacuum duties with substantial gas flow. The available portfolio should not be interpreted as confirmation of a specific protective material or coating.
Material Evidence: Confirm the dry screw product and chemical envelope rather than treating general backing-pump capability as a corrosion guarantee. See Pfeiffer screw pump technical information.
Buying Tips: Specify the required screw-pump duty and ask for the exact product. Confirm material protection, medium limits, controls and the service route rather than inferring compatibility from the brand. Specify corrosion protection explicitly and ask the supplier to identify any proposed alternative separately.
8. GOFLEX
Website: https://goflexpump.com/
Core Technologies: Screw, Roots and other vacuum pumps; OEM/ODM configurations
Best Fit: OEM inquiry requiring treatment-specific build confirmation
Company Overview: GOFLEX describes manufacturing and testing across several vacuum mechanisms, including screw and Roots equipment, and publishes OEM/ODM options. Its customization offering supports an identified product inquiry. The collected material does not establish a particular specialty coating or bulk-alloy screw pump.
Material Evidence: A customized screw inquiry needs explicit medium compatibility and build evidence, beyond the general OEM offering.
Buying Tips: Establish whether the requested build is available before sample approval. Obtain a drawing, material schedule, treatment scope and agreed acceptance test for the actual pump. Specify corrosion protection explicitly and ask the supplier to identify any proposed alternative separately.
Material and Construction Comparison
| Construction | What It Describes | What to Verify |
|---|---|---|
| Compatible substrate or alloy | Material chosen for the exposed components | Exact composition and medium review |
| Protective surface layer | A treatment applied to specified parts | Coverage, defects, finishing and cleaning limits |
| Seal and isolation design | Protection at shafts and fluid boundaries | Construction, leakage requirements and utilities |
| Process operating strategy | Control of the approved pump environment | Temperature, purge, separation and shutdown procedure |
How to Choose a Corrosion Resistant Dry Screw Vacuum Pump Manufacturer
1. Provide the Full Chemical Envelope
Supply gas and vapor composition, concentrations, pressure, temperature and expected changes through the batch or continuous process. Include condensed liquids, contaminants and cleaning fluids. Identify abnormal conditions the system must address instead of specifying only the normal gas name.
2. Require a Component Material Schedule
List the construction of rotors, housing, end plates, seals and other exposed components. Identify any coatings and untreated areas. Ask the supplier to connect the schedule to its application review and to state the limits of the proposed configuration.
3. Review Condensation and Protection
Discuss how the chosen pump handles the actual vapor and possible condensate. Request the applicable temperature control, purge, traps or separators and the approved startup and shutdown instructions. Use the selected model's requirements rather than assuming one protection arrangement fits all dry screw pumps.
4. Compare Controls and Utilities
Define cooling, electrical supply and any required gas utilities. Review monitoring and protective functions for the approved process envelope. Include exhaust handling and the supplier's installation boundary, particularly when the quotation is for a complete package.
5. Agree on Evidence and Lifecycle Support
Request the model curve, material traceability and the agreed performance and inspection records. Establish cleaning, servicing and replacement-part procedures. Define how actual process compatibility will be verified when factory performance tests use a different test gas.
What Affects the Cost of the Pump and Protection Package?
The quotation should identify the complete pump configuration and the specified material construction. Compare the same process conditions and scope across offers so that treatment, accessories and inspection work are visible rather than hidden behind a bare pump price.
- Dry screw capacity, rotor design and package configuration
- Compatible alloys, coatings, seals and treated components
- Cooling, purge, separation and exhaust scope
- Instrumentation, controls and application engineering
- Cleaning, maintenance, consumables and repair support
Request a written material schedule, a performance basis and a lifecycle service plan. These make the proposed construction reviewable and provide a practical acceptance reference for the delivered equipment.
FAQs – Corrosion Resistant Dry Screw Vacuum Pump
Q1: Does oil-free mean corrosion resistant?
No. Oil-free describes the pumping chamber's fluid arrangement. Corrosion suitability depends on materials and the specified chemical and operating conditions.
Q2: Can a coating solve every corrosion problem?
No. Exposed parts, seals, defects and operating conditions still matter. Review the full construction and process strategy.
Q3: Why provide cleaning chemicals?
They can expose the pump to conditions different from production. Include them in the compatibility and maintenance review.
Q4: Is a clean-gas performance test sufficient?
It verifies agreed performance under its stated conditions. It does not automatically reproduce the actual chemical service, so define any additional application evidence or site verification.
Q5: Should a liquid ring alternative be considered?
Where the process warrants it, compare alternatives on the same medium, pressure and utility basis. A technology change must be assessed as a complete system.
Q6: Why shortlist DV Vacuum?
It publishes DVS dry screw equipment and identifiable corrosion-protection options. Confirm the exact build and operating envelope in a process-specific proposal.
Which Corrosion Resistant Dry Screw Vacuum Pump Manufacturer Fits Your Project?
Compare the chemical-oriented Edwards offering with the configured options from DV Vacuum, Vacculex and EVP, and qualify the other candidates by exact model and material evidence. Choose the supplier that can explain the complete chemical envelope, component construction and service plan.
Send each shortlisted supplier the same medium, pressure, temperature and installation data. Require an identified model, explicit material construction, operating limits and support plan before approving an order.