Vacuum Pump Cross Reference Chart | Busch, Becker, Leybold, Edwards, Welch Equivalents
Vacuum Pump Replacement Guide | Find Your Equivalent Fast
Looking for a replacement for your current vacuum pump? Use this guide to move quickly from the model you have now to the pump family, repair parts, oil, or replacement class that makes the most sense.
This page is built for maintenance teams, lab buyers, engineers, and purchasing departments who need a practical replacement path for common Busch, Leybold, Edwards, Welch, Alcatel / Adixen, and Varian / Agilent pump families.
Best For Pump Buyers
If you already know your current pump model and want the fastest route to a comparable replacement class, start with the replacement scenarios below.
Best For Parts Buyers
If your pump should be rebuilt instead of replaced, use the direct links to the repair-kit and parts families further down this page.
Best For Labs & Industry
This guide covers both industrial single-stage classes like Busch R5 / SOGEVAC style pumps and deeper-vacuum two-stage lab pumps like Edwards RV, E2M, and Leybold D-series families.
Common Replacement Scenarios
These are the kinds of replacement decisions buyers make every day. Use these as a starting point, then review the table below to narrow down the best fit for your application.
Replacing a Busch R5 RA0040?
Start with: Busch R5 40 m³/h class, Becker U 5.40 class, Leybold SOGEVAC SV40B class, or Edwards nES40 class.
Best next click: Busch R5 Repair Kits & Parts
Replacing a Leybold D40B?
Start with: Edwards E2M28 / E2M40 class depending on duty, or comparable higher-capacity two-stage lab / process families.
Best next click: Leybold D40B Repair Kits & Parts
Replacing an Edwards E2M28?
Start with: Edwards E2M28 family, Leybold D25B / D40B range, or comparable Alcatel 2021-style higher-capacity lab pumps.
Best next click: Edwards E2M Series Repair Kits & Parts
Replacing an Edwards RV5 or RV8?
Start with: Edwards RV family, Leybold D8B to D16B range depending on requirement, or comparable Alcatel / Varian small lab classes.
Best next click: Edwards RV Repair Kits & Parts
Replacing a Welch 1402 or 1397?
Start with: Edwards RV5 for smaller 1402-style applications, and Edwards E2M28 or Leybold D25B / D40B class for larger 1397-style applications.
Best next click: Welch 1402 Repair Kits or Welch 1397 Repair Kits
Replacing an Alcatel 2005 / 2010 / 2015 / 2021?
Start with: Edwards RV3 / RV5 for smaller units, Edwards E2M18 / E2M28 for larger units, or comparable Leybold D-series families.
Best next click: Alcatel / Adixen Repair Kits & Parts
Vacuum Pump Replacement Table
Use this table to move from the model you have now to the most likely replacement family or service class. In many cases, the best answer may be to rebuild the pump you have rather than replace it outright.
| Current Pump | Pump Type / Class | Approx. Flow | Typical Replacement Direction | Recommended VPS Family Page | Why This Is a Good Starting Point |
|---|---|---|---|---|---|
| Busch R5 RA0025 | Single-stage industrial rotary vane | ~15 CFM | Leybold SV25 class / small industrial oil-lubricated class | Busch R5 Repair Kits & Parts | Good entry point for small packaging and general industrial users who need the same service class. |
| Busch R5 RA0040 | Single-stage industrial rotary vane | ~23.5 CFM | Becker U 5.40 / Leybold SV40B / Edwards nES40 class | Busch R5 Repair Kits & Parts | One of the cleanest industrial cross-reference points. |
| Busch R5 RA0063 | Single-stage industrial rotary vane | ~37 CFM | Becker U 5.65 / Leybold SV65B / Edwards nES65 class | Busch R5 Repair Kits & Parts | Strong fit for users replacing a mid-small industrial oil-lubricated pump. |
| Busch R5 RA0100 | Single-stage industrial rotary vane | ~59 CFM | Becker U 5.101 / Leybold SV100B / Edwards nES100 class | Busch R5 Repair Kits & Parts | Popular industrial size where replacement research often starts by flow class. |
| Leybold D4B | Two-stage lab rotary vane | Small lab class | Edwards RV3 / Alcatel 2005 / Varian DS102 class | Leybold D4B Repair Kits & Parts | Good fit for smaller bench, research, and instrument vacuum applications. |
| Leybold D8B | Two-stage lab rotary vane | Small-to-mid lab class | Edwards RV5 / Alcatel 2010 / Welch 1402 class | Leybold D8B Repair Kits & Parts | Useful range for small lab systems where deeper vacuum matters more than raw flow. |
| Leybold D16B | Two-stage lab rotary vane | Mid lab class | Edwards E2M18 / Alcatel 2015 / Welch 1376 class | Leybold D16B Repair Kits & Parts | Strong crossover point between common lab, analytical, and support-process pumps. |
| Leybold D25B | Two-stage lab rotary vane | Higher-capacity lab class | Edwards E2M28 / Alcatel 2021 / Welch 1397 class | Leybold D25B Repair Kits & Parts | Important size class for buyers replacing older research or instrumentation pumps. |
| Leybold D40B | Two-stage lab / process rotary vane | Large lab / process class | Edwards E2M28 to E2M40 range / Alcatel 2021 to 2033 range | Leybold D40B Repair Kits & Parts | Useful when users need more capacity but still want two-stage vacuum performance. |
| Leybold D65B | Two-stage lab / process rotary vane | High-capacity two-stage class | Edwards E2M80 class / larger process two-stage families | Leybold D65B Repair Kits & Parts | Best for larger two-stage process or research applications requiring more pumping speed. |
| Edwards RV3 | Two-stage lab rotary vane | Small lab class | Leybold D4B / Alcatel 2005 / Varian DS102 class | Edwards RV Repair Kits & Parts | Common small Edwards pump for lab and analytical use. |
| Edwards RV5 | Two-stage lab rotary vane | Small-to-mid lab class | Leybold D8B / Alcatel 2010 / Welch 1402 class | Edwards RV Repair Kits & Parts | Good match point for smaller lab pumps and routine research duty. |
| Edwards RV8 | Two-stage lab rotary vane | Bridge-size RV class | Between RV5 and RV12; smaller D16B-style applications depending on use | Edwards RV Repair Kits & Parts | Useful when buyers search specifically by RV family instead of exact capacity class. |
| Edwards RV12 | Two-stage lab rotary vane | Upper RV class | Larger small-lab applications; sometimes compared alongside D16B-range jobs | Edwards RV Repair Kits & Parts | Popular model-specific search even when buyers are still figuring out the exact replacement path. |
| Edwards E2M1.5 | Very small two-stage lab rotary vane | Very small bench class | Small instrument / bench replacement path | Edwards E2M Series Repair Kits & Parts | Useful for instrument users and small bench systems. |
| Edwards E2M18 | Mid lab two-stage rotary vane | ~13 CFM class | Leybold D16B / Alcatel 2015 / Welch 1376 class | Edwards E2M Series Repair Kits & Parts | Strong crossover point for mid-size two-stage lab pumps. |
| Edwards E2M28 | Higher-capacity lab two-stage rotary vane | ~20 CFM class | Leybold D25B / D40B / Alcatel 2021 / Welch 1397 class | Edwards E2M Series Repair Kits & Parts | One of the most important higher-capacity lab replacement families. |
| Edwards E2M40 | Larger lab / process two-stage rotary vane | ~28 CFM class | Leybold D40B / D65B range / Alcatel 2033 range | Edwards E2M Series Repair Kits & Parts | Good bridge between larger lab systems and light process applications. |
| Edwards E2M80 | High-capacity two-stage rotary vane | ~50 CFM class | Leybold D65B range / larger two-stage process applications | Edwards E2M Series Repair Kits & Parts | Useful for higher-flow research and process users who still need deep vacuum performance. |
| Edwards E2S85 | Current Edwards two-stage family | Large two-stage class | Review separately from standard E2M assumptions | Edwards E2M / E2S Service Family | Useful to include because buyers may see E2S models in current Edwards catalogs and look for service direction. |
| Welch 1402 | Small lab rotary vane | ~5.6 CFM | Edwards RV5 / Leybold D8B / Alcatel 2010 class | Welch 1402 Repair Kits | One of the most common small Welch models buyers still search by name. |
| Welch 1397 | Higher-capacity lab rotary vane | ~17.7 CFM | Edwards E2M28 / Leybold D25B / Alcatel 2021 class | Welch 1397 Repair Kits | Good fit for users replacing older higher-capacity Welch lab pumps. |
| Alcatel 2005 | Small lab two-stage rotary vane | ~3.5 CFM | Edwards RV3 / Leybold D4B / Varian DS102 class | Alcatel / Adixen Repair Kits & Parts | Classic small lab cross-reference row. |
| Alcatel 2010 | Small-to-mid lab two-stage rotary vane | ~7 CFM | Edwards RV5 / Leybold D8B / Welch 1402 class | Alcatel / Adixen Repair Kits & Parts | Strong fit for smaller research and bench systems. |
| Alcatel 2015 | Mid lab two-stage rotary vane | ~13 CFM | Edwards E2M18 / Leybold D16B / Welch 1376 class | Alcatel / Adixen Repair Kits & Parts | Useful crossover row for medium-size lab duty. |
| Alcatel 2021 | Higher-capacity lab two-stage rotary vane | ~21 CFM | Edwards E2M28 / Leybold D25B-D40B / Welch 1397 class | Alcatel / Adixen Repair Kits & Parts | One of the key higher-capacity lab replacement classes. |
Need help choosing the right replacement?
Send us your current pump model, voltage, application, and any nameplate information you have. We can help point you toward the right repair-kit family, oil, or practical replacement class.
How to Choose the Right Replacement
Do not choose a replacement based only on one spec. The best replacement path depends on the full service requirement of the pump and the system it supports.
- Flow / CFM: Helps determine how quickly the system evacuates.
- Ultimate vacuum: Especially important for laboratories, analytical systems, and deeper-vacuum applications.
- Single-stage vs. two-stage: Industrial packaging and process pumps often prioritize ruggedness, while lab pumps often prioritize deeper vacuum.
- Voltage and frequency: Always confirm before replacing any pump.
- Connections and footprint: Inlet, exhaust, and mounting differences can stop a simple swap.
- Repair vs. replace: Sometimes the best move is to rebuild the pump you already own using the right kit, vanes, seals, and oil.
Repair Parts, Oil, and Resource Links
Busch R5 Repair Parts
Find overhaul kits, vanes, filters, and maintenance parts for Busch R5 pumps.
Edwards RV Repair Parts
Browse parts and kits for Edwards RV3, RV5, RV8, and RV12 pumps.
Edwards E2M Repair Parts
Find service parts for Edwards E2M-family pumps.
Leybold D-Series Repair Parts
Browse common D-series pages including D4B, D8B, D16B, D25B, D40B, and D65B.
Vacuum Pump Oil
See the service fluids used across common rotary vane vacuum pump families.
Cross Reference Resources
Need to compare more brands and classes first? Start with the broader cross-reference tool.
Frequently Asked Questions
Can I use this page to choose an exact replacement pump?
This page is designed as a starting point. It helps narrow the field to the right pump family or service class, but the final choice should always be confirmed against full technical requirements.
Is it better to replace my pump or rebuild it?
That depends on the condition of the pump, the cost of downtime, and how complete your current unit is. In many cases, rebuilding with the correct parts and oil is the best value.
What matters more, CFM or ultimate vacuum?
Both matter. CFM affects evacuation speed, while ultimate vacuum affects how deep the system can pull. The right answer depends on the application.
Why does this page group some pumps by family instead of exact one-to-one models?
Because many buyers first need the right replacement class before narrowing down exact dimensions, electrical requirements, and application fit.