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NASA-LLIS-0497
Lessons Learned - Propulsion Valve Contamination Sources in Vendor Test Facilities (1995)
Year: 1997
Abstract: Abstract:
The Cassini/Mars Global Surveyor thruster high pressure latch valve was redesigned to use a Kel-F seal instead of Teflon. Because the harder plastic has less ability to seal around small particles, particulate contamination in the helium gas can cause random leakage. Use high purity helium for pressure testing and for flight consumables, and establish contamination control procedures.
The Cassini/Mars Global Surveyor thruster high pressure latch valve was redesigned to use a Kel-F seal instead of Teflon. Because the harder plastic has less ability to seal around small particles, particulate contamination in the helium gas can cause random leakage. Use high purity helium for pressure testing and for flight consumables, and establish contamination control procedures.
Subject: Parts Materials & Processes
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| contributor author | NASA - National Aeronautics and Space Administration (NASA) | |
| date accessioned | 2017-09-04T18:18:16Z | |
| date available | 2017-09-04T18:18:16Z | |
| date copyright | 03/13/1997 | |
| date issued | 1997 | |
| identifier other | HRBEQCAAAAAAAAAA.pdf | |
| identifier uri | http://yse.yabesh.ir/std;jsery=autho162s7D8308/handle/yse/200997 | |
| description abstract | Abstract: The Cassini/Mars Global Surveyor thruster high pressure latch valve was redesigned to use a Kel-F seal instead of Teflon. Because the harder plastic has less ability to seal around small particles, particulate contamination in the helium gas can cause random leakage. Use high purity helium for pressure testing and for flight consumables, and establish contamination control procedures. | |
| language | English | |
| title | NASA-LLIS-0497 | num |
| title | Lessons Learned - Propulsion Valve Contamination Sources in Vendor Test Facilities (1995) | en |
| type | standard | |
| page | 3 | |
| status | Active | |
| tree | NASA - National Aeronautics and Space Administration (NASA):;1997 | |
| contenttype | fulltext | |
| subject keywords | Parts Materials & Processes | |
| subject keywords | Spacecraft | |
| subject keywords | Test & Verification | |
| subject keywords | Test Article |