0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1

100

80

60

40

20

0

Cv/ Cv

b. Control Valve

: EQ 50 : 1 30 : 1 25 : 1 15 : 1 10 : 1

Linear 50 : 1

30 : 1 25 : 1 15 : 1 10 : 1

Globe Valve(Cage Trim) Cv

Body Size StrokeLinear Flow

CvEqual Flow

CvQuick OpenFlow Cv

15 11.2 11.2 14.2

1 20 19 18.5 21.4

1 20 34.2 34 38

2 30 60.5 56.2 67.2

2 38 84 83 93.5

3 38 135 125 150

4 50 211 210 235

5 50 294 276 368

6 50 438 424 547

8 100 690 675 871

10 100 1082 1050 1260

12 130 1690 1620 2090

5. (Velocity)

,

.

, , , Port

. ,

, Body Size .

(,, ) ,

.

= D2Q t + 273

288

1033

P2. . = 1.27 +

D2 P2

Q (t + 273)

v = 354.(Q/D2)

v = 354.(QC/D2)

v : (m/s2)Q : (:/h, :/h, :/h(15,1atm)C : (/)D : (mm)t : ()

v

: 6 m/sec

: 150 200 m/sec

: 50 80 m/sec

: 80 120 m/sec

Feed Water : 4.5 m/sec

: 3 m/sec

/ : 2m/sec

Class Test Class Test

-

Cv

0.0013.5 bar

Cv 0.5

Cv 0.1 3.5 bar

Cv 0.01