5
■
EPDT-213b
■
4. Nominal Size Selection
■OB-30, OB-30U
[For steam]
<How to use the chart>
When selecting the nominal size of a temperature regulator whose inlet pressure (P1), outlet pressure
(P2), and steam flow rate are 0.2 MPa, 0.15 MPa, and 20 kg/h, respectively, first find intersection point
(a) of the inlet pressure of 0.2 MPa and the outlet pressure of 0.15 MPa. Trace down vertically from
this intersection point (a) to find intersection point (b) with the flow rate of 20 kg/h. Since this intersection
point (b) lies between nominal sizes 15A and 20A, select the larger one, 20A.
