Definition of Butterfly valve
(Mech.)
a
kind
of
double
clack
valve
,
consisting
of
two
semicircular
clappers
or
wings
hinged
to
a
cross
rib
in
the
pump
bucket
.
When
open
it
somewhat
resembles
a
butterfly
in
shape
.
See also:
Butterfly
Related Words
carburetor
,
carburettor
,
valve
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butterfly weed
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