Vacuum Insulated Piping [Manufactured by Jeck Tohri] ◎Certified by the Minister of Economy, Trade and Industry

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last updated：Apr 27, 2026

There are many examples of use in supply piping for various liquefied gases such as liquefied nitrogen, liquefied oxygen, and liquefied hydrogen. The evaporation loss is very low, and it is maintenance-free after installation.

The vacuum insulated piping manufactured by Jeck Tohri is used for the supply piping of various liquefied gases such as "liquid nitrogen," "liquid oxygen," and "liquid hydrogen." It has very low evaporation loss and is particularly adopted for various applications such as cooling in MBE, preventing oxidation in soft drinks, and boosting pressure. Additionally, one of its strengths is that it is maintenance-free after installation. For more details, please contact us or refer to our cryogenic equipment product catalog. *As of April 1, 2019, the comprehensive catalog has been revised. (Please refer to the URL below.)*

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basic information

【Features】 ◯ Uses welded stainless steel pipes ◯ The heat intrusion in the flexible section is approximately three times that of the straight pipe section ◯ Appropriate sizes will be selected according to the fluid name, specification pressure, and required processing amount ◯ Custom designs and manufacturing are available for sizes other than standard ◯ A LN2 shield type with very low heat intrusion is also available for LHe use ● For more details, please contact us or refer to our cryogenic equipment product catalog. ◎ As of April 1, 2019, the comprehensive catalog has been revised. (See the URL below)

Price information

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Delivery Time

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Applications/Examples of results

【Examples of Use】 - Semiconductor environmental testing equipment - Vacuum deposition equipment - Cooling processing equipment - Gas sealing devices such as halogen lamps - Cooling circulation devices for superconducting cable current limiters/biasing devices - Cooling for superconducting magnets in accelerators, etc. - Space chambers - Cryopreservation equipment ● For more details, please contact us.

Line up（12）

Model number	overview
[Standard Specification] Inner Transfer Pipe × Outer Jacket Pipe (φ(mm) × φ(mm))	[Specification Details] 〇 Bayonet Joint Flange Outer Diameter (mm) 〇 Weld Joint (mm) 〇 Heat Ingress (W/m) ・Straight Pipe Section ・Bayonet Connector ・Flexible Tube
1/2	〇 Bayonet Joint Flange Outer Diameter: φ 90mm 〇 Weld Joint: φ-----mm 〇 Heat Ingress (W/m) ・Straight Pipe Section: 0.32 ・Bayonet Connector: 1.2 ・Flexible Tube: (0.96)
10A×40A (φ17.3×φ48.6)	〇 Bayonet Joint Flange Outer Diameter: φ 90mm 〇 Weld Joint: φ-----mm 〇 Heat Ingress (W/m) ・Straight Pipe Section: 0.35 ・Bayonet Connector: 1.2 ・Flexible Tube: (1.05)
15A×50A (φ21.7×φ60.5)	〇 Bayonet Joint Flange Outer Diameter: φ100mm 〇 Weld Joint: φ-----mm 〇 Heat Ingress (W/m) ・Straight Pipe Section: 0.38 ・Bayonet Connector: 2.2 ・Flexible Tube: (1.14)
20A×50A (φ27.2×φ60.5)	〇 Bayonet Joint Flange Outer Diameter: φ100mm 〇 Weld Joint: φ-----mm 〇 Heat Ingress (W/m) ・Straight Pipe Section: 0.42 ・Bayonet Connector: 2.9 ・Flexible Tube: (1.26)
25A×65A (φ34.0×φ76.3)	〇 Bayonet Joint Flange Outer Diameter: φ120mm 〇 Weld Joint: φ-----mm 〇 Heat Ingress (W/m) ・Straight Pipe Section: 0.46 ・Bayonet Connector: 2.9 ・Flexible Tube: (1.38)
40A×80A (φ48.6×φ89.1)	〇 Bayonet Joint Flange Outer Diameter: φ150mm 〇 Weld Joint: φ-----mm 〇 Heat Ingress (W/m) ・Straight Pipe Section: 0.56 ・Bayonet Connector: 6.12 ・Flexible Tube: (1.68)
50A×100A (φ60.5×φ114.3)	〇 Bayonet Joint Flange Outer Diameter: φ225mm 〇 Weld Joint: φ-----mm 〇 Heat Ingress (W/m) ・Straight Pipe Section: 0.76 ・Bayonet Connector: 8.0 ・Flexible Tube: (2.28)
65A×125A (φ76.3×φ139.8)	〇 Bayonet Joint Flange Outer Diameter: φ240mm 〇 Weld Joint: φ216.3mm 〇 Heat Ingress (W/m) ・Straight Pipe Section: 0.89 ・Bayonet Connector: 8.07 ・Flexible Tube: (2.67)
80A×125A (φ89.1×φ139.8)	〇 Bayonet Joint Flange Outer Diameter: φ240mm 〇 Weld Joint: φ216.3mm 〇 Heat Ingress (W/m) ・Straight Pipe Section: 0.95 ・Bayonet Connector: 11.1 ・Flexible Tube: (2.85)
100A×150A (φ114.3×φ165.2)	〇 Bayonet Joint Flange Outer Diameter: φ---mm 〇 Weld Joint: φ267.4mm 〇 Heat Ingress (W/m) ・Straight Pipe Section: 1.24 ・Bayonet Connector: ---- ・Flexible Tube: (3.72)
◇Notes◇	・Welded stainless steel pipes will be used. ・The heat ingress for the flexible section is approximately three times that of the straight pipe section. ・Appropriate sizes will be selected based on fluid name, specification pressure, and required processing volume. ・Custom designs and manufacturing are available for sizes other than standard. ・There is also a LN2 shield type (developed technology by CVI) with very low heat ingress for use with LHe.