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4.1 Pressure reducing valve specification selection chart
To select the most appropriate pressure reducing valve, refer to the above selection chart. Find the
intersection point of the inlet pressure (P
within the range (A), two-stage pressure reduction is required. In this case, maximize the distance
between the valves (at least 3 meters). The valve does not fulfill specified performance in the range
(C).
4.2 Safety valve setting pressure chart
Determine the reduced pressure of pressure reducing valve. Find the intersection point (A) with the
chart curve. Next, find point (B) by proceeds horizontally from point (A) to the left until the 'Setting
pressure of safety valve' axis. The setting pressure of the safety valve should be higher than the
pressure of the point (B).
4. Nominal size selection method
) and the reduced pressure (P
1
6
). If the intersection point is
2
EPDT-021a
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