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1. (WO2018125442) DUAL-ALLOY PYROTECHNIC-ACTUATED VALVE ASSEMBLY

Pub. No.:    WO/2018/125442    International Application No.:    PCT/US2017/062940
Publication Date: Fri Jul 06 01:59:59 CEST 2018 International Filing Date: Thu Nov 23 00:59:59 CET 2017
IPC: F16K 31/12
F16K 1/20
F16K 3/02
Applicants: GE-HITACHI NUCLEAR ENERGY AMERICAS LLC
Inventors: MELITO, Joel, Patrick
Title: DUAL-ALLOY PYROTECHNIC-ACTUATED VALVE ASSEMBLY
Abstract:
A pyrotechnic-actuated valve assembly may include an insert body having an inlet, an outlet, and a flow path extending from the inlet to the outlet. The insert body is formed of a first alloy, A shear structure is bonded to the outlet of the insert body so as to close the flow path. The shear structure is formed of a second alloy. The second alloy of the shear structure is bonded to the first alloy of the insert body so as to form a hermetic seal. The dual -alloy nature of the valve assembly allows a relatively clean shearing of the shear structure during actuation, thus reducing or preventing the occurrence of deformation and/or material fragments in the flow path.