Specialty Gases Reference Guide

Issue link:

Contents of this Issue


Page 21 of 394

Cylinders and Containers Liquid Helium Containers High Performance Liquid Helium Dewars Praxair dewars make handling liquid helium easier because they have several features developed and patented specifically for this special purpose. ■ Multi-layer insulation to reduce evaporation losses. ■ Cooled shields to simplify your operation thereby reducing costs and hazards. Escaping helium vapor is used to cool the system, avoiding the need for cooling with nitrogen and the subsequent cost and hazardous vapors in an enclosed area. ■ Light weight for easier lifting and moving. B 6 ■ Rugged, all-welded construction for increased performance life of the multi-layer insulation and shield system. ■ Large-diameter neck tubes to allow for better structural integrity and for larger-sized liquid helium withdrawal apparatus. ■ Non-magnetic dewars available for use with Magnetic Resonance Imaging (MRI) units. ■ Absolute relief valve to extend use of dewars to airborne as well as surface shipments. ■ Complete Society of Automotive Engineers (SAE) range of dewars available to meet all known liquid helium volume needs. LT-100 LT-250 Capacity (liters max) Diameter (in/cm) Height (in/cm) Tare Weight (lb/kg) Neck Diameter (in/cm) NER (Static loss max. per day) LT-60 60 24/61 LT-100 100 24/61 200/91 LT-500 LT-250 250 32/81.3 1.45/3.7 1.75% 1.45/3.7 1.25% 335/152 2.4/6.1 1% LT-500 500 42/106.7 51/127.3 59/147.9 67/171.1 70/179.3 165/75 540/245 2.9/7.4 .75% Pressure Gauge Withdrawal/Fill Ball Valve Vent/Pressurization Valve Multilayer Superinsulation Vapor Cooled Shields Liquid Helium Reservoir Vacuum Jacket LT-250 Liquid Helium Dewar Details 1-877-PRAXAIR

Articles in this issue

Links on this page

Archives of this issue

view archives of Praxair - Specialty Gases Reference Guide