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COMPONENT STUDY

Pulse-tube cryocoolers and helium compressors

How a pulse tube pre-cools a dilution refrigerator with no moving cold parts, who makes the cold heads and compressors, and where the helium-4 comes from.

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The cold head: a rotary valve that switches the helium flow, regenerators packed with fine metal or rare-earth material, and thin pulse tubes, with a first stage at about 40 kelvin and a second at about 3 kelvin.

How does a pulse-tube cryocooler work?

A water-cooled compressor drives high-pressure helium-4 through flexible lines to a cold head of regenerators and thin tubes. Sumitomo Heavy Industries explains that nothing moves at a pulse tube’s cold end, so vibration is low, whereas a Gifford-McMahon cooler’s regenerator moves back and forth; that is why pulse tubes pre-cool dilution refrigerators. SHI’s highest-capacity 4 K model, the RP-222B3S launched in September 2026, delivers up to 2.0 W at 4.2 K and 55 W at 45 K, needs maintenance every 20,000 hours and ships with an F-100 compressor. Inside a refrigerator the pulse tube pre-cools the dilution insert, the radiation shields, the helium-3 and the wiring; Cryomech’s PT310-RM, optimized for about 3 K, raised mixing-chamber cooling power in Bluefors systems by 10–20%. Large refrigerators carry two, such as ETH Zurich’s, with a pair of Cryomech PT420s.

Who makes the cold heads and compressors?

Our sources name two main makers. Cryomech of Syracuse, New York, has belonged to private Bluefors since March 28, 2023; Bluefors says it has delivered 15,000 cryocoolers and that its 2024 expansion nearly doubled Cryomech’s cryocooler capacity. Sumitomo Heavy Industries, whose Advanced Technologies unit claims the largest installed base of cryocoolers worldwide, sells RP-series pulse tubes with F-series water-cooled compressors and designs its newest for dilution refrigeration and quantum technologies. Its F-70 compressor draws 6.7–8.5 kW with a pulse tube and needs 6–9 liters a minute of 5–25 °C cooling water, which is why a chiller sits beside it. ULVAC makes pulse tubes in house for its own dilution refrigerators. For much larger machines, IHI is developing a turbo-type refrigeration cycle for a few kelvin, with Nippon Sanso building the dilution stage, for a 10,000-qubit-class system under a NEDO program that runs to fiscal 2027.

Where does the helium come from, and is it a constraint?

A dry refrigerator does not boil off liquid helium, but its compressor and cold head run on helium-4, which is also most of the dilution mixture, and the USGS notes that nothing substitutes for helium in cryogenic applications below −429 °F. World output was about 190 million cubic meters in 2025, led by the United States at about 81 million and Qatar at about 63 million, and EU and US bans on Russian helium continued into 2025. Supply runs through a few large companies: ExxonMobil said in 2022 that its LaBarge plant supplies 20% of the world’s helium, Linde and Air Products call themselves leading helium suppliers, and Iwatani puts its share of Japan’s market at about 50%. Nippon Sanso raised Japanese helium prices by an average of 30% or more from July 2026 after production suspensions in the Middle East. None names a quantum customer, and stock3d’s Scale mode treats helium-4 as a concentration risk rather than a volume limit.

How to research a cryocooler or helium company

  1. Separate cold heads and compressors from the refrigerators they go into: Cryomech units ship inside Bluefors systems, while SHI sells to refrigerator makers it does not name.
  2. Check the business mix: SHI reports cryocoolers inside its Mechatronics segment and tied recent order growth to semiconductor demand, not quantum computing.
  3. Treat development programs as programs: the IHI and Nippon Sanso cooling system is funded research for fiscal 2025–2027, with no product or customer yet.
  4. For helium, separate producers such as ExxonMobil from global distributors such as Linde, Air Products and Air Liquide and from regional ones such as Iwatani and Nippon Sanso; none discloses helium sales to quantum-computer makers.
  5. Check site needs: a large compressor draws several kilowatts and needs cooling water, and D-Wave says its annealing systems draw 12.5 kW, most of it for the refrigerators’ cryocoolers.
  6. Use the list as a starting point: it is curated, not exhaustive, and the model is illustrative, not a bill of materials.

Sources

Engineering reference: Pulse-tube cryocooler example. Company-specific evidence is linked from the profiles below.

Explore the complete cryocoolers & helium sector · Read the mapping methodology

Related company research

These companies have relevant documented product roles. Open a profile for the source and limitation.

Also in this study (not publicly listed)

  • Cryomech Subsidiary of Bluefors (private)

    Syracuse, New York maker of PT-series pulse-tube cryocoolers (PT205–PT820), Gifford-McMahon cryocoolers, helium compressors and helium liquefiers; its PT310-RM is integrated into Bluefors dilution refrigerators.

    Source

  • Bluefors Not publicly listed

    Finnish dilution-refrigerator maker (XLDsl, LD and the KIDE platform for more than 1,000 qubits) that calls itself the world leader in cryogenic cooling systems for quantum technology. It completed its acquisition of US pulse-tube maker Cryomech on Mar 28, 2023, and in Sept 2025 agreed to purchase up to 10,000 liters a year of lunar helium-3 from Interlune for delivery in 2028–2037.

    Source

  • ULVAC CRYOGENICS Subsidiary of ULVAC (6728.T) and Edwards (Atlas Copco) as a 50:50 joint venture

    Co-developer of ULVAC’s quantum dilution refrigerator; a 50:50 joint venture of ULVAC, Inc. and Edwards Vacuum LLC (Atlas Copco Group) per its company outline, so it is not a wholly owned subsidiary of either. ULVAC’s own listing covers the role.

    Source