Nash liquid ring vacuum pumps: independent brand profile
Nash is the name most engineers associate with liquid ring vacuum pumps, the rugged machines that keep paper mills, power plants and chemical plants running. Founded in 1905, it now belongs to Ingersoll Rand. This profile sets out the verifiable history, shows how AI assistants agree on the past but not the present, and compares search interest.
Independent profile by Vacuum Engineering Tools. We are not affiliated with Nash, receive no payment and do not sell pumps. Quotes are the opinions of individual users, not statements of fact by us. Brand names belong to their respective owners.
In short
Nash (originally the Nash Engineering Company of Norwalk, Connecticut, founded 1905) specialises in liquid ring vacuum pumps and compressors. In 2002 it merged with Siemens’ liquid ring business to form Nash Elmo; Gardner Denver acquired it in 2004, and Gardner Denver later merged with Ingersoll Rand, which reports Nash within its industrial vacuum and blower business. Its pumps serve pulp and paper, power, petrochemical, mining and food processing. We found no Reddit or forum discussion specific to Nash.
Verified facts
What users say
A search of Google’s index of reddit.com for Nash liquid ring pumps returned only shop listings and spam pages that reuse the brand name. There is no Reddit discussion of Nash pumps to report.
Reddit blocks automated access, so thread titles, links and previews come from Google’s index of reddit.com (October 2026). Previews are excerpts, not the full comment.
From specialist forums
Liquid ring pumps are discussed by process engineers on specialist forums, but rarely by brand. Nash’s reputation is built through plant references and long service lives rather than public reviews.
No quotable forum posts found.
AI fact-check: what ChatGPT, Gemini, Perplexity and Claude say
On 9 October 2026 we asked all four assistants the same question (who owns Nash, headquarters, founding, best-known series and what buyers say) and checked every answer against the manufacturer’s own pages.
| Question | ChatGPT (gpt-5.5) | Gemini (3.5 Flash) | Perplexity (Sonar) | Claude (Sonnet 5.5) | Verified |
|---|---|---|---|---|---|
| Who owns it? | ✓ Ingersoll Rand | ✓ Ingersoll Rand | ✓ Ingersoll Rand | ✓ Gardner Denver Nash LLC, part of Ingersoll Rand | Ingersoll Rand [Source] |
| Headquarters | ~ Davidson, NC (Ingersoll Rand HQ) | ? Charleroi, Pennsylvania | ? Bentleyville, Pennsylvania | ? Trumbull, Connecticut | Not verifiable: Nash’s website blocks automated checks [Source] |
| Founded | ✓ 1905, Lewis H. Nash | ✓ 1905, Lewis H. Nash | ✓ 1905, Lewis H. Nash | ✓ 1905, Lewis H. Nash | 1905, Norwalk, Connecticut [Source] |
| Series named | ✓ CL, 2BE, Vectra | ✓ 904/CL, Vectra, 2BE | ✓ Vectra, CL, TC | ~ 2BV, AL, CL | Vectra and CL are core Nash lines; 2BE/2BV stem from the Siemens heritage [Source] |
✓ correct · ~ partly right or outdated · ✗ wrong · ? cannot be checked against an official source. Answers condensed. Only Perplexity used web search; the other models answered from training data.
Nash shows a striking pattern: all four assistants agree on 1905 and Lewis H. Nash, then name four different places as today’s headquarters (Davidson, Charleroi, Bentleyville and Trumbull). ChatGPT gave the parent company’s head office. Nash’s own site blocks automated checks, so we cannot say which, if any, is right; we have marked those answers as unverifiable rather than guess.
Search interest compared
Google Trends data compared with other process vacuum brands (liquid ring, ejectors, rotary piston), web search, October 2021 to October 2026. “nash vacuum pump” has a tiny global average, partly because Nash is a common word and surname, but it takes almost a third of this group’s searches in the US, India and Singapore.
Average search interest 2021–2026 (index)
Where people search for Nash
How to read this: of every 100 Google searches for these five brand names in Singapore, 33 were for Nash; the most searched brand there, Robuschi, had 67. It shows relative interest, not sales or market share.
| Country | Nash share | Rank | Most searched |
|---|---|---|---|
| Singapore | 33 % | 2nd of 5 | Robuschi (67 %) |
| United States | 31 % | 1st of 5 | — |
| India | 30 % | 2nd of 5 | Robuschi (48 %) |
| Sweden | 16 % | 3rd of 5 | Robuschi (61 %) |
| Mexico | 15 % | 3rd of 5 | Robuschi (60 %) |
| Australia | 13 % | 2nd of 5 | Robuschi (74 %) |
| Netherlands | 12 % | 3rd of 5 | Robuschi (68 %) |
| Thailand | 11 % | 3rd of 5 | SIHI (45 %) |
| United Kingdom | 7 % | 3rd of 5 | Robuschi (75 %) |
| Indonesia | 7 % | 3rd of 5 | SIHI (51 %) |
| Germany | 6 % | 3rd of 5 | Robuschi (84 %) |
| Malaysia | 6 % | 3rd of 5 | SIHI (56 %) |
Pulled on 9 October 2026 via DataForSEO. Terms compared: “nash vacuum pump”, “robuschi”, “sihi pump”, “graham ejector”, “kinney vacuum pump”. Relative values, not absolute search volumes; non-English searches are not included.
Technology fingerprint
Computed from our directory of 25 manufacturers: which technologies Nash offers and how common each is in the market.
| Technology | Makers in our directory | |
|---|---|---|
| Liquid ring | 9 of 25 |
Not in the range: Rotary vane, Screw, Claw, Scroll, Roots, Turbomolecular, Diaphragm
Closest alternatives
Manufacturers with the largest overlap in pump technologies.
- Flowserve SIHI
- Graham
- Robuschi Sister brand
- Dekker Vacuum Technologies
- Tuthill (Kinney) Sister brand
Product series at a glance
| Series | Technology | What it is for |
|---|---|---|
| Vectra | Liquid ring | Modern liquid ring vacuum pumps for process and paper duty. |
| CL | Liquid ring | Long-running single-stage line for large flows in paper and mining. |
| Liquid ring compressors | Liquid ring | For toxic, explosive or corrosive gases such as flare gas and chlorine. |
Typical fit
- Pulp and paper machines
- Power plant condenser exhausting
- Petrochemical and flare-gas recovery
- Mining and food processing
Useful calculators
Official owner resources
Frequently asked questions
Who owns Nash vacuum pumps?
Nash belongs to Ingersoll Rand. Gardner Denver acquired Nash Elmo in 2004 and merged with Ingersoll Rand’s industrial business in 2020; Ingersoll Rand reports Nash within its industrial vacuum and blower business.
Is Nash related to Elmo Rietschle?
Yes. In 2002 Nash merged with Siemens’ liquid ring business (Elmo) to form Nash Elmo. Today Nash and Elmo Rietschle are both Ingersoll Rand brands, with Nash focused on large liquid ring systems.
What are Nash liquid ring pumps used for?
Applications where gas is wet, dirty or carries vapour: paper machine dewatering, power plant condenser exhausting, chemical and petrochemical processes, mining and food processing. The sealing liquid absorbs heat and tolerates liquid carry-over.
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