NASA-LLIS-0102

Lessons Learned - High Pressure Shutoff Valves; Vacuum Pump Isolation Valve

contributor author	NASA - National Aeronautics and Space Administration (NASA)
date accessioned	2017-09-04T15:54:37Z
date available	2017-09-04T15:54:37Z
date copyright	08/11/1992
date issued	1992
identifier other	QSYCQCAAAAAAAAAA.pdf
identifier uri	https://yse.yabesh.ir/std/handle/yse/58006
description abstract	Description of Driving Event: A vacuum pump isolation valve burst at the Pad B high pressure gas storage battery. The cause of the incident has been attributed to the seepage of pressure from the wheel valves after they were turned off as part of a safing operation. The wheel valve o-ring does not always seat properly. Normally this would not affect the remainder of the system, the seepage pressure would be confined. However, when the vacuum pump was connected to the system, the seepage pressure (1500 psi) was greater than the design capacity of the vacuum pump isolation valve and thus overpressurization occurred.
language	English
title	NASA-LLIS-0102	num
title	Lessons Learned - High Pressure Shutoff Valves; Vacuum Pump Isolation Valve	en
type	standard
page	2
status	Active
tree	NASA - National Aeronautics and Space Administration (NASA):;1992
contenttype	fulltext
subject keywords	Facilities
subject keywords	Ground Equipment
subject keywords	Hardware
subject keywords	Industrial Operations
subject keywords	Pressure Vessels