ULVAC vacuum pumps: independent brand profile
ULVAC is Japan’s largest vacuum technology group, supplying pumps and complete deposition systems to semiconductor, display and solar factories. This profile sets out its documented history, shows three AI assistants supplying founder names that ULVAC itself never mentions, and maps where the brand dominates search.
Independent profile by Vacuum Engineering Tools. We are not affiliated with ULVAC, 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
ULVAC, Inc. (Chigasaki, Kanagawa, Japan) was founded in 1952 as Japan Vacuum Engineering Co., Ltd. to import and sell vacuum equipment, with a technical agreement with the US firm NRC Equipment Corporation. It grew into a maker of vacuum pumps (oil-sealed rotary vane such as the VD series, dry pumps, turbomolecular pumps and cryopumps, the latter through ULVAC Cryogenics, a joint company with Helix Technology) and of complete vacuum production systems. There is no public owner discussion of ULVAC pumps on Reddit.
Verified facts
What users say
A search of Google’s index of reddit.com for ULVAC vacuum pumps found no relevant threads. That is typical for semiconductor fab equipment: the buyers are equipment and facilities engineers who discuss suppliers internally, not on public forums.
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
Used and refurbished pumps from this maker are traded by specialist rebuilders, which is where most of its public footprint lies.
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 ULVAC, 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? | ✓ ULVAC, Inc., listed in Japan | ✓ Listed on the Tokyo Stock Exchange | ✓ Public, owned by shareholders | ✓ Public, no single owner | ULVAC, Inc., a listed company [Source] |
| Headquarters | ✓ Chigasaki, Kanagawa | ✓ Chigasaki, Kanagawa | ✓ Chigasaki, Kanagawa | ✓ Chigasaki, Kanagawa | Chigasaki, Kanagawa [Source] |
| Founded | ✓ 1952; founder not disclosed | ? 1952, “led by Jin Imachi” | ? 1952, “Masui Meiji” | ~ 1952 as Japan Vacuum Engineering; “Michio Kanamori” | 1952 as Japan Vacuum Engineering; no founder named by ULVAC [Source] |
| Series named | ✓ GLD, GVD, UTM | ~ LR/HR, VD, PBL | ✓ VD/VDN, GHD, UTM | ~ GLD, DIS/DISD, CRYO-U | VD rotary vane, dry pumps, turbos, cryopumps [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.
ULVAC’s own history names no founder: it says the company was set up in 1952 to import vacuum equipment. Three assistants still supplied names (“Jin Imachi”, “Masui Meiji”, “Michio Kanamori”), each different. Only ChatGPT said the founder is not disclosed. Claude was the only one to give the original company name, Japan Vacuum Engineering, which is correct.
Search interest compared
Google Trends data compared with other Japanese and Korean semiconductor-vacuum brands, web search, October 2021 to October 2026. “ulvac” dominates this group in the semiconductor and display hubs: 88 % of searches in Japan, 89 % in Taiwan and over 60 % in South Korea, Singapore, Malaysia and Thailand.
Average search interest 2021–2026 (index)
Where people search for ULVAC
How to read this: of every 100 Google searches for these five brand names in Taiwan, 89 were for ULVAC, more than for any other brand. It shows relative interest, not sales or market share.
| Country | ULVAC share | Rank | Most searched |
|---|---|---|---|
| Taiwan | 89 % | 1st of 5 | — |
| Japan | 88 % | 1st of 5 | — |
| Thailand | 81 % | 1st of 5 | — |
| South Korea | 69 % | 1st of 5 | — |
| Singapore | 64 % | 1st of 5 | — |
| Malaysia | 62 % | 1st of 5 | — |
| Mexico | 56 % | 1st of 5 | — |
| Germany | 42 % | 1st of 5 | — |
| Italy | 39 % | 2nd of 5 | LOT (41 %) |
| France | 24 % | 3rd of 5 | LOT (48 %) |
| United Kingdom | 18 % | 2nd of 5 | LOT (67 %) |
| United States | 11 % | 2nd of 5 | LOT (81 %) |
Pulled on 9 October 2026 via DataForSEO. Terms compared: “ulvac”, “ebara vacuum pump”, “kashiyama pump”, “osaka vacuum”, “lot vacuum”. Relative values, not absolute search volumes; non-English searches are not included.
Technology fingerprint
Computed from our directory of 25 manufacturers: which technologies ULVAC offers and how common each is in the market.
| Technology | Makers in our directory | |
|---|---|---|
| Cryopump | 3 of 25 | rare |
| Turbomolecular | 7 of 25 | |
| Screw | 11 of 25 | |
| Roots | 11 of 25 | |
| Rotary vane | 15 of 25 |
Not in the range: Claw, Liquid ring, Scroll, Diaphragm
Closest alternatives
Manufacturers with the largest overlap in pump technologies.
Product series at a glance
| Series | Technology | What it is for |
|---|---|---|
| VD / VDN | Rotary vane | Oil-sealed rotary vane pumps for labs and equipment. |
| Dry pumps | Screw | Oil-free dry pumps for semiconductor and display processes. |
| Turbomolecular pumps | Turbomolecular | High-vacuum pumps for deposition and analysis. |
| Cryopumps | Cryopump | Via ULVAC Cryogenics, for clean high vacuum. |
Typical fit
- Semiconductor and flat panel display production
- Thin-film deposition systems
- Research high vacuum (turbos, cryopumps)
- General lab rotary vane pumps
Useful calculators
Official owner resources
Frequently asked questions
Who owns ULVAC?
ULVAC, Inc. is a listed Japanese company headquartered in Chigasaki, Kanagawa. It was founded in 1952 as Japan Vacuum Engineering Co., Ltd.
Who founded ULVAC?
ULVAC’s official history does not name an individual founder. It says the company was founded in 1952 to import and sell vacuum equipment, under a general agent agreement with NRC Equipment Corporation of the USA.
Does ULVAC only make pumps?
No. Besides rotary vane, dry, turbomolecular and cryopumps, ULVAC builds complete vacuum production systems for semiconductors, displays and other industries.
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