Computer Science – Performance
Scientific paper
Jan 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982aiaa.meetw....s&link_type=abstract
American Institute of Aeronautics and Astronautics, Aerospace Sciences Meeting, 20th, Orlando, FL, Jan. 11-14, 1982, 4 p.
Computer Science
Performance
Control Valves, Cryogenic Equipment, Infrared Astronomy, Pressure Regulators, Spaceborne Telescopes, Spacecraft Instruments, Computer Techniques, Leakage, Performance Tests, Remote Control, Temperature Dependence
Scientific paper
Space-compatible cryogenic valves are now required to operate between room and liquid helium temperatures. A remotely controllable cryogenic valve is described, which is made of bellows-type stainless steel and is operated by a miniature dc motor with integral gearset (485:1) at a nominal voltage of 28 Vdc. The power transmission provides a further reduction of 7.2:1 to give an overall gear ratio of nearly 3500:1, assuring reliability of operation at low temperatures. Valve performance (leak rate) data are presented at LN2, LHe, and SfHe temperatures at delivered torques of 18, 27, 31, and 35 N-m. At a closing torque of 31 N-m, a leak rate of 0.028 scc/sec was achieved at 2 K, while at a torque of 18 N-m the leak rate at 300 K was less than 3 x 10 to the -9th scc/sec.
Salerno L. J.
Spivak A. L.
No associations
LandOfFree
A cryogenic valve for spacecraft applications does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with A cryogenic valve for spacecraft applications, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A cryogenic valve for spacecraft applications will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1455210