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4.3 Characteristic chart
(1) Flow rate characteristics chart
● Shut-off pressure rise: 0.02 MPa or less
● Offset: 10% or less of set pressure at outlet side (Minimum value: 0.0MPa)
Using the nominal size selection chart, select the nominal size of 80 ~ 90% of the flow rate,
considering pressure loss and heat loss of the gate valve and the strainer before and after
the pressure reducing valve. To fully utilize the flow characteristics of the valve, do not select
a small pipe size, considering the effects due to pipe resistance.
(2) Pressure characteristics chart
Reduced pressure is set to 0.14 MPa when inlet pressure is 1.75 MPa. The chart indicates
a variation in reduced pressure when the inlet pressure is changed within the range of 0.2
to 2.0 MPa.
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■EPDT-098a■
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