Nominal Size Selection Chart - Yoshitake GP-1200 Installation And Operation Manual

5.4 Nominal size selection chart

1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
Nominal
0
size
15A
20A
25A
32A
40A
50A
65A
80A
100A
[Ex.1]
For example, take a pressure reducing valve whose inlet pressure (P
is 0.4 MPa, flow rate 800 kg/h. First, find the point of intersection (A) of inlet pressure 0.6 MPa and
reduced pressure 0.4 MPa. Vertically proceed from point (A) to come across the flow rate 800 kg/h,
and regard this point as (B). Point (B) is between nominal sizes 40A and 50A. Select the larger
nominal size 50A.
[Ex.2]
For example, take a pressure reducing valve whose inlet pressure (P
is 0.05 MPa, flow rate 600 kg/h. First, find the point of intersection (C) of inlet pressure 0.8 MPa and
the diagonal line. Move leftward down the diagonal line to intersection point (D) where the diagonals
line intersect with the reduced pressure 0.05 MPa. Vertically proceed from point (D) to come across
the flow rate 600 kg/h, and regard this point as (E). Point (E) is between nominal sizes 32A and 40A.
Select the larger nominal size 40A.
0.7
0.6
0.5
0.4
0.3
0.2
0.1
‑5‑
1.0
0.9
0.8
(A)
(D)
(C)
(E)
(B)
) is 0.6 MPa, reduced pressure (P
1
) is 0.8 MPa, reduced pressure (P
1
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
)
2
)
2
■EPDT-101■