Yoshitake OB-3, Quick Start Manual, Page: 6 / 14

5
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EPDT-258b
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4. Nominal Size Selection Chart
●
OB-3
･
3G (For Water)
How to use chart
When selecting the nominal size of a temperature regulator whose inlet pressure (P1), outlet (P2), and
steam flow rate are 0.3MPa, 0.15MPa, 9 m3/h, respectively, first find intersection point (a) of the
differential pressure = 0.15MPa (0.3MPa-0.15MPa) and the flow rate = 9 m3/h. Since the intersection
point (a) lies between nominal size 32A and 40A, select the larger one, 40A.
Nominal size
V
: F
lo
w
ra
te
m
3
/h
Δ
P: Differential pressure MPa
(a)