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CMSH Series

The Cryofab CMSH helium dewar is designed for minimum loss storage, transportation and dispensing of liquid helium. The CMSH container employs state of the art vapor cooled multishield technology in conjunction with superinsulation to effect the lowest guaranteed loss rates in the industry on comparable units. The advanced insulation system results in quicker, more efficient cool down without the necessity for nitrogen pre-cooling. In addition, the elimination of LN2 or helium gas circulation shielding means that the CMSH is virtually maintenance free.

These units have the same general areas of use as old-style, 4-wall helium containers but permit large storage capacities in small packages with lighter weight.

Construction Features

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.

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.

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
• Applications include Distribution, Research and Liquefaction
• Two-year warranty on vacuum

Standard Size Specifications
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Commercial Air Transport Vessel Specifications
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CMSH Calibration Charts

Piping Schematic

Symbol Description V-1 Liquid Valve V-2 Vent Valve V-3 Isolation Valve RD-1 Rupture Disk* RV-1 Relief Valve, 15 PSIG RV-2 Relief Valve, 10 PSIG RV-3 Pressure Control Valve, .5 PSIG PI-1 Compound Pressure Gauge 30" Hg-0-15 PSIG *Only on capacities 200 Liters and greater.

Standard Access Ports [Click on an image to enlarge]

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