Technical Specifications

21000 Series Control Valves Technical Specifications | 13
Direction: FLOW-TO-OPEN (FTO)
Flow Characteristic: EQUAL PERCENT
Rating: ASME 2500 (PN 420)
Percent of Travel 10 20 30 40 50 60 70 80 90 100
FL 0.93 0.93 0.93 0.93 0.93 0.92 0.92 0.91 0.91 0.90
Valve Size
ASME
Rating
Orifice
Diameter
Travel
Rated Cv
Inch mm Inch mm Inch mm
0.75 20 2500
0.25 6.4 0.8 20.3 0.05 0.08 0.11 0.18 0.3 0.5 0.8 1.1 1.5 1.7
0.375 9.5 0.8 20.3 0.12 0.17 0.24 0.39 0.68 1.13 1.76 2.5 3.26 3.8
0.5 12.7 0.8 20.3 0.18 0.27 0.38 0.62 1.07 1.79 2.77 3.95 5.14 6
0.812 20.6 0.8 20.3 0.29 0.41 0.56 0.9 1.5 2.9 4.5 6 7 8
1 25 2500
0.25 6.4 0.8 20.3 0.05 0.08 0.11 0.18 0.3 0.5 0.8 1.1 1.5 1.7
0.375 9.5 0.8 20.3 0.12 0.17 0.24 0.39 0.68 1.13 1.76 2.5 3.26 3.8
0.5 12.7 0.8 20.3 0.18 0.27 0.38 0.62 1.07 1.79 2.77 3.95 5.14 6
0.812 20.6 0.8 20.3 0.36 0.51 0.7 1.1 1.9 3.6 5.6 7.4 9 10
1.5 40 2500
0.25 6.4 0.8 20.3 0.05 0.08 0.11 0.18 0.3 0.5 0.8 1.1 1.5 1.7
0.375 9.5 0.8 20.3 0.12 0.17 0.24 0.39 0.68 1.13 1.76 2.5 3.26 3.8
0.5 12.7 0.8 20.3 0.18 0.27 0.38 0.62 1.07 1.79 2.77 3.95 5.14 6
0.812 20.6 0.8 20.3 0.4 0.59 0.82 1.34 2.32 3.87 6.01 8.57 11.1 13
0.994 25.2 0.8 20.3 0.43 0.73 1.14 1.73 2.69 4.61 6.93 10.76 14.84 18
1.25 31.8 0.8 20.3 0.72 1.02 1.4 2.2 3.8 7.2 11 15 18 20
1.625 41.3 0.8 20.3 0.9 1.28 1.76 2.8 4.7 9 14 19 22 25
2 50 2500
0.25 6.4 0.8 20.3 0.05 0.08 0.11 0.18 0.3 0.5 0.8 1.1 1.5 1.7
0.375 9.5 0.8 20.3 0.12 0.17 0.24 0.39 0.68 1.13 1.76 2.5 3.26 3.8
0.5 12.7 0.8 20.3 0.18 0.27 0.38 0.62 1.07 1.79 2.77 3.95 5.14 6
0.812 20.6 0.8 20.3 0.46 0.68 0.95 1.55 2.68 4.47 6.93 9.88 12.9 15
0.994 25.2 0.8 20.3 0.46 0.77 1.2 1.82 2.84 4.87 7.32 11.36 15.67 19
1.25 31.8 0.8 20.3 0.8 1.17 1.64 2.68 4.64 7.75 12 17.1 22.3 26
1.625 41.3 0.8 20.3 1.3 1.8 2.5 3.9 6.6 13 20 26 31 35
Contoured Plug
C
v
and F
L
versus Travel
1. Close clearance 0.75 and 1 are available in quick change trim only (Model 21114).
2. Models 21614 and 21615 available only in Cv ranges as indicated by