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high-pressure isolation (HPI) valve definition
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D
E
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Q
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a
shutoff valve
located on the high-pressure
side
of a
gas
piping
system
that, when closed, isolates the purged
volume
from the
pressure
regulator
and other downstream components. [SEMI F13-93]
See also:
hertz (Hz) definition
Heisenberg Uncertainty Principle definition
Helmholtz coil definition
hemes and heme derivatives definition
high-pressure purge system definition
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