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Valves & Actuators
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Area of Inertia
Ix:
Area of Inertia x axis
b:
width
h:
height
d:
Diameter
Area of Inertia: Rectangle
Ix
=
(
b
·
h³
) / 12
a²
ac²
cm⁴
ft⁴
ha²
in⁴
km⁴
m⁴
mm⁴
yd⁴
cm
ft
in
km
m
mi
mm
nmi
yd
cm
ft
in
km
m
mi
mm
nmi
yd
Area of Inertia: Circle
Ix
= ( π
·
d⁴
) / 64
a²
ac²
cm⁴
ft⁴
ha²
in⁴
km⁴
m⁴
mm⁴
yd⁴
cm
ft
in
km
m
mi
mm
nmi
yd
Area of Inertia: Ring
Ix
= π · (
de⁴
-
di⁴
) / 64
a²
ac²
cm⁴
ft⁴
ha²
in⁴
km⁴
m⁴
mm⁴
yd⁴
cm
ft
in
km
m
mi
mm
nmi
yd
cm
ft
in
km
m
mi
mm
nmi
yd
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