NASA-LLIS-0420

Lessons Learned – VO'75 Pressure Regulator Leakage and Work-Around Procedures (~1976)

contributor author	NASA - National Aeronautics and Space Administration (NASA)
date accessioned	2017-09-04T15:42:41Z
date available	2017-09-04T15:42:41Z
date copyright	07/08/1996
date issued	1996
identifier other	PKBEQCAAAAAAAAAA.pdf
identifier uri	https://yse.yabesh.ir/std/handle/yse/44936
description abstract	Abstract: The pressure regulator in the Viking Orbiter Propulsion Subsystem started leaking following a pyro firing that occurred prior to the near-Mars TCM. Likely causes were corrosion or residue from propellant migration or pyro valve blowby, or particulate contamination. Recommendations included using separate regulators for the fuel and oxidizer sides, incorporating a bellows in the pyro valve to eliminate blowby, and adding a isolation valve between the regulator and propellant tank.
language	English
title	NASA-LLIS-0420	num
title	Lessons Learned – VO'75 Pressure Regulator Leakage and Work-Around Procedures (~1976)	en
type	standard
page	3
status	Active
tree	NASA - National Aeronautics and Space Administration (NASA):;1996
contenttype	fulltext
subject keywords	Energetic Materials - Explosive/Propellant/Pyrotechnic
subject keywords	Material Compatibility
subject keywords	Pressure Vessels
subject keywords	Propellant Feed System