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CMSH Liquid Helium Dewar Calibration Chart and Drawings

The below liquid helium dewar calibration charts correspond to the model CMSH multishield liquid helium containers. The Cryofab-designed CMSH helium dewar sets the standard as the ultimate combination between minimum loss storage, portability, and the dispensing of liquid helium.


Select vessel size (in liters). "S" Models are for transport.

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CMSH 30
Liquid Helium Dewar Calibration Chart

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in.literscmliters
10.810.1
22.720.5
35.531.0
48.741.8
512.052.6
615.263.7
718.574.8
821.786.0
925.097.2
1028.2108.5
1131.0119.8
1232.91211.1
1333.71312.3
  1413.6
  1514.9
  1616.2
  1717.5
  1818.7
  1920.0
  2021.3
  2122.6
  2223.9
  2325.2
  2426.4
  2527.7
  2628.9
  2730.0
  2831.0
  2931.9
  3032.6
  3133.2
  3233.5
  3333.7
CMSH 30 Drawing

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Cryofab_CMSH_30_drawing
Figure A Port Assembly

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liquid access port
CMSH Piping Schematic

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CMSH Piping schematic
SymbolDescription
V-1Liquid Valve
V-2Vent Valve
V-3Isolation Valve
RD-1Rupture Disk*
RV-1Relief Valve, 15 PSI
RV-2Relief Valve, 10 PSI
RV-3Pressure Control Valve, .5 PSI
PI-1Compound Pressure Gauge 30" Hg-0-15 PSI

*Only on capacities 200 Liters and greater.

Superior Quality Liquid Helium Dewars

We can guarantee the CMSH container offers the lowest loss rates in the industry, when compared to similar units, because we employ state of the art vapor cooled multi-shield technology in conjunction with superinsulation.

Our advanced insulation system results in quicker, more efficient cool down without the need for nitrogen pre-cooling. In addition, the elimination of LN2 or helium gas circulation shielding means that the CMSH is virtually maintenance free.

The helium reservoir and outer jacket are welded 304 stainless steel. Larger diameter necks accept standard helium transfer lines and eliminate thermal oscillations. This also allows for testing superconducting leads or other applications requiring dipping or immersion of components.

Standard equipment includes a removable halo ring providing protection for the manifold and components while allowing for easy access. Also a variety of handle configurations allow for easy pulling and securing.

The evacuation port is conveniently accessible for re-evacuation and serves as a vacuum space relief port.

Standard equipment includes a removable halo ring providing protection for the manifold and components while allowing for easy access. Also a variety of handle configurations allow for easy pulling and securing.

The evacuation port is conveniently accessible for re-evacuation and serves as a vacuum space relief port.

All containers feature quick opening ball valves and quick couplings for easy insertion and pressure sealing of transfer lines with minimum loss of container pressure.

Additional features include:
  • No liquid nitrogen shielding or helium gas circulation required
  • Lightweight but rugged construction stands up to trucking and everyday abuse
  • Suitable for air transport
  • All welded construction
  • Lowest loss rates in the industry
  • All units equipped with integral caster base
  • Easily removable and interchangeable manifolds
  • Suitable for neon and all other liquid gases
  • Applications include Distribution, Research and Liquefaction
  • Two-year warranty on vacuum