Long Shaft Cryogenic Pumps
Barber-Nichols, Inc. (BNI) has designed and manufactured thousands of cryogenic pumps since 1974. Long Shaft Cryogenic Pumps separate the impeller (cold end) from the motor (warm end) with a long, thin-walled shaft. This shaft minimizes heat leaking from the motor and atmosphere into the cryogenic fluid. Long Shaft Cryogenic Pumps can either be bolted or welded to a variety of dewars and cryostats. Additionally, they are well suited for use with extremely cold cryogens (i.e. Helium & Hydrogen). BNI's cryogenic pumps provide quiet, reliable performance at low NPSH and nearly all utilize a hermetic design to eliminate shaft seals and cryogen leakage.
Special features include:
- Hermetically sealed equipment that is necessary for hard vacuum operating conditions
- Dry lubricated and low vapor pressure grease packed bearings that will not contaminate process fluids
- Variable Frequency Drives (VFD) that optimize pump efficiency and allow it to operate across a wide range of conditions
Some typical applications for these pumps include the circulation of:
- Liquid nitrogen for the cooling of high temperature superconducting cables
- Liquid and supercritical helium for the cooling of superconducting magnets
- Liquid nitrogen for the cooling of synchrotron beamline crystals
BNI's long shaft cryogenic pumps are currently in operation at laboratories all over the world including:
- Argonne National Laboratory
- Brookhaven National Laboratory
- Centre Européen de Recherche Nucléaire (CERN)
- Deutsches Elektronen-Synchrotron (DESY)
- European Synchrotron Radiation Facility (ESRF)
- Japan Atomic Energy Research Institute (JAERI)
- Japan Synchrotron Radiation Research Institute (Spring-8)
- Los Alamos National Laboratory
- Oakridge National Laboratory (ORNL)
- Stanford Linear Accelerator Center (SLAC)