Yoshitake OB-30 Manual page 22

OB-2, 2G
OB-2, 2G Nominal Size Selection Chart (For Steam)
(a)
Nominal size
(b)
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How to use the chart
When selecting the nominal size of a temperature regulator whose inlet pressure (P 1 ), outlet pressure (P 2 ), and steam
flow rate are 0.3 MPa, 0.25 MPa, and 60 kg/h, respectively, first find intersection point (a) of the inlet pressure of 0.3
MPa and the outlet pressure of 0.25 MPa. Trace down vertically from this intersection point (a) to find intersection point
(b) with the flow rate of 60 kg/h.
Since this intersection point (b) lies between nominal sizes 15A or 20A and 25A, select the larger one, 25A.
* Chart of the flow rate is a reference value.
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