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4.4 Nominal size selection chart
[Example]
When selecting the nominal size of a pressure reducing valve with its inlet pressure (P
) is 0.6
1
MPa, its reduced pressure (P
) is 0.4 MPa and its steam flow rate is 600 kg/h, first find the
2
intersection point (a) of inlet pressure 0.6 MPa and reduced pressure 0.4 MPa. Trace down
vertically from this intersection point (a) to find intersection point (b) with the flow rate of 600 kg/h.
Since the intersection point (b) is between nominal sizes 20A and 25A, select the larger one, 25A.
8
EPDT-021a
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