Download - Valve Cv Sizing Liquids Gases
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SHEET FOR VALVE SIZING CALCULATIONS.
CONDITION - FLOW MEDIUM LIQUID / FLOW IS BY WEIGHT.
INPUT DATA
1 SERVICE FLUID LIQUID
2 FLOW RATE (1000 Kg/hr) MAX / NOR / MIN (w) 5 7 10
3 5
4 4
5 DELTA P - SIZING (BAR) 1
6 320
7 SPECIFIC GRAVITY (G) 1.1
Since DELTA P < P1/2. Therefore, flow is subcritical.
5.8 8.2 11.7
INLET PRESSURE (P1) BARA
OUTLET PRESSURE (P2) BARA
FLUID TEMPERATURE (T) 0K
Formula for C v Calculation ( Flow By Weight )
Cv = 1.16w / S Gr x DELTA P
Cv(max) = Cv(Nor) = Cv(Min) =
![Page 2: Valve Cv Sizing Liquids Gases](https://reader033.vdocument.in/reader033/viewer/2022061107/544c51f9b1af9fae558b4a20/html5/thumbnails/2.jpg)
FROM mm OF wc
CONVERSIONS :
1 TO CONVERT PRESSURE.
FROM Kg/Cm2 (g)
FROM BAR
2 TO CONVERT TEMPERATURE.
Gr = G x ( 288 / T ) = 0.990
Since DELTA P < P1/2. Therefore, flow is subcritical.
Since DELTA P > P1/2. Therefore, flow is critical.
FROM 0 C
Where Gr = Specific Gravity of the fluid at flowing temperature.
![Page 3: Valve Cv Sizing Liquids Gases](https://reader033.vdocument.in/reader033/viewer/2022061107/544c51f9b1af9fae558b4a20/html5/thumbnails/3.jpg)
0.000 bar
TO CONVERT PRESSURE.
INPUT VALUE IN BARA
1.0130
1.0130
TO CONVERT TEMPERATURE.
INPUT
273
VALUE IN 0K.
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SHEET FOR VALVE SIZING CALCULATIONS.
CONDITION - FLOW MEDIUM LIQUID / VOLUMETRIC FLOW.
INPUT DATA
1 SERVICE FLUID LIQUID
2
3
4
5 DELTA P - SIZING (BAR) 0
6
7 SPECIFIC GRAVITY (G)
Since DELTA P > P1/2. Therefore, flow is critical.
#DIV/0! #DIV/0! #DIV/0!
FLOW RATE (m3/hr) MAX / NOR / MIN (Q)
INLET PRESSURE (P1) BARA
OUTLET PRESSURE (P2) BARA
FLUID TEMPERATURE (T) 0K
Formula for C v Calculation ( Flow By VOLUME )
Cv = 1.16QS Gr / DELTA P
Cv(max) = Cv(Nor) = Cv(Min) =
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Gr = G x ( 288 / T ) = #DIV/0!
Since DELTA P < P1/2. Therefore, flow is subcritical.
Since DELTA P > P1/2. Therefore, flow is critical.
Where Gr = Specific Gravity of the fluid at flowing temperature.
![Page 6: Valve Cv Sizing Liquids Gases](https://reader033.vdocument.in/reader033/viewer/2022061107/544c51f9b1af9fae558b4a20/html5/thumbnails/6.jpg)
FROM mm OF wc 0.000 bar
CONVERSIONS :
1 TO CONVERT PRESSURE.
INPUT VALUE IN BARA
FROM Kg/Cm2 (g) 4 4.9358
FROM BAR 1.013
2 TO CONVERT TEMPERATURE.
INPUT
273
VALUE IN 0K.
FROM 0 C
![Page 7: Valve Cv Sizing Liquids Gases](https://reader033.vdocument.in/reader033/viewer/2022061107/544c51f9b1af9fae558b4a20/html5/thumbnails/7.jpg)
SHEET FOR VALVE SIZING CALCULATIONS.
CONDITION - FLOW MEDIUM GAS / FLOW IS BY WEIGHT.
INPUT DATA
1 SERVICE FLUID GAS
2
3
4
5 0
6
7
8
Since DELTA P > P1/2. Therefore, flow is critical.
#DIV/0! #DIV/0! #DIV/0!
FLOW RATE (1000 Kg/hr) MAX / NOR / MIN (w)
INLET PRESSURE (P1) BARA
OUTLET PRESSURE (P2) BARA
DELTA P - SIZING (BAR)
FLUID TEMPERATURE (T) 0K
SPECIFIC GRAVITY (G)
COMPRESSABILITY FACTOR (Z)
Formula for C v Calculation ( Flow By Weight )
Cv = 47.2 w S Z / S (DELTA P x (P1 + P2) Gr)
Cv(max) = Cv(Nor) = Cv(Min) =
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GAS
Gr = G x ( 288 / T ) = #DIV/0!
Since DELTA P < P1/2. Therefore, flow is subcritical.
Since DELTA P > P1/2. Therefore, flow is critical.
Where Gr = Specific Gravity of the fluid at flowing temperature.
![Page 9: Valve Cv Sizing Liquids Gases](https://reader033.vdocument.in/reader033/viewer/2022061107/544c51f9b1af9fae558b4a20/html5/thumbnails/9.jpg)
FROM mm OF wc 0.000
CONVERSIONS :
1 TO CONVERT PRESSURE.
INPUT VALUE IN BARA
FROM Kg/Cm2 (g) 1.0130
FROM BAR 1.0130
2 TO CONVERT TEMPERATURE.
INPUT
273
/2. Therefore, flow is subcritical.
VALUE IN 0K.
FROM 0 C
![Page 10: Valve Cv Sizing Liquids Gases](https://reader033.vdocument.in/reader033/viewer/2022061107/544c51f9b1af9fae558b4a20/html5/thumbnails/10.jpg)
bar
![Page 11: Valve Cv Sizing Liquids Gases](https://reader033.vdocument.in/reader033/viewer/2022061107/544c51f9b1af9fae558b4a20/html5/thumbnails/11.jpg)
SHEET FOR VALVE SIZING CALCULATIONS.
CONDITION - FLOW MEDIUM GAS / FLOW IS BY VOLUME.
INPUT DATA
1 SERVICE FLUID GAS
2 10800 3600 4140
3 0.000 0.000 0.000
4 0.000 0.000 0.000
5 0.001 0.001 0.002
6 318
7 1
8 1
Since DELTA P > P1/2. Therefore, flow is critical.
#DIV/0! #DIV/0! #DIV/0!
FLOW RATE (m3/hr) MAX / NOR / MIN (Q)
INLET PRESSURE (P1) BARA
OUTLET PRESSURE (P2) BARA
DELTA P - SIZING
FLUID TEMPERATURE (T) 0K
SPECIFIC GRAVITY (G)
COMPRESSABILITY FACTOR (Z)
Formula for C v Calculation ( Flow By Volume )
Cv = (Q / 295) S (G x T x Z) / (DELTA P x (P1 + P2))
Cv(max) = Cv(Nor) = Cv(Min) =
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q 10 20 17.99
2.6 17 14.1
Since DELTA P < P1/2. Therefore, flow is subcritical.
Since DELTA P > P1/2. Therefore, flow is critical.
q1 q2 q3
CV
CV1 CV2
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q 4740 6420 5580.0032 36 34.0
q1 q2 q3
CV
CV1 CV2
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CONVERSIONS :
1 TO CONVERT PRESSURE.
INPUT VALUE IN BARA
FROM Kg/Cm2 (g) 3 3.9551
FROM BAR 0.001 1.0140
FROM mm OF wc 10 0.001 bar
2 TO CONVERT TEMPERATURE.
INPUT
45 318
1.0135 1.0135
1.014 1.014
1.0149 1.0149
VALUE IN 0K.
FROM 0 C
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CONDITION - FLOW MEDIUM GAS / FLOW IS BY WEIGHT.
INPUT DATA
1 SERVICE FLUID GAS
2 120
3 6.1
4 2
5 4.1
6 373
7 1.16
8 1
9 CRITICAL FLOW FACTOR 0.8
Since DELTA P > P1/2. Therefore, flow is critical.
1244.3 0.0 0.0
SHEET FOR VALVE SIZING CALCULATIONS FOR FLOW IN KG / HR & DP > P1/2
FLOW RATE (1000 Kg/hr) MAX / NOR / MIN (w)
INLET PRESSURE (P1) BARA
OUTLET PRESSURE (P2) BARA
DELTA P - SIZING (BAR)
FLUID TEMPERATURE (T) 0K
SPECIFIC GRAVITY (GF)
COMPRESSABILITY FACTOR (Z)
Formula for C v Calculation ( Flow By Weight )
Cv = 54.5 w S Z / (CF x P1 x S GF )
Cv(max) = Cv(Nor) = Cv(Min) =
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GAS
Gr = G x ( 288 / T ) = 0.896
SHEET FOR VALVE SIZING CALCULATIONS FOR FLOW IN KG / HR & DP > P1/2
Since DELTA P < P1/2. Therefore, flow is subcritical.
Since DELTA P > P1/2. Therefore, flow is critical.
Where Gr = Specific Gravity of the fluid at flowing temperature.
![Page 17: Valve Cv Sizing Liquids Gases](https://reader033.vdocument.in/reader033/viewer/2022061107/544c51f9b1af9fae558b4a20/html5/thumbnails/17.jpg)
FROM mm OF wc 0.000
CONVERSIONS :
1 TO CONVERT PRESSURE.
INPUT VALUE IN BARA
FROM Kg/Cm2 (g) 1.0130
FROM BAR 1.0130
2 TO CONVERT TEMPERATURE.
INPUT
100 373
/2. Therefore, flow is subcritical.
VALUE IN 0K.
FROM 0 C
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bar
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SHEET FOR VALVE SIZING CALCULATIONS.
CONDITION - FLOW MEDIUM GAS / FLOW IS BY VOLUME.
INPUT DATA
1 SERVICE FLUID GAS
2 1575 1365
3 8.013 8.013
4 7.513 7.513
5 0.500 0.500
6 333
7 0.865
8 1
SELECTED Cv 258
Match Factor (M) 1
Since DELTA P < P1/2. Therefore, flow is subcritical.
= 0.0
FLOW RATE (m3/hr) MAX / NOR / MIN (Q)
INLET PRESSURE (P1) BARA
OUTLET PRESSURE (P2) BARA
DELTA P - SIZING
FLUID TEMPERATURE (T) 0K
SPECIFIC GRAVITY (G)
COMPRESSABILITY FACTOR (Z)
Formula for C v Calculation ( Flow By Volume )
DP
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GAS 343
220.5
8.013
2.513
5.500
q 80 90 93.89
230 258 268.9
Since DELTA P < P1/2. Therefore, flow is subcritical.
Since DELTA P > P1/2. Therefore, flow is critical.
q1 q2 q3
CV
CV1 CV2
![Page 21: Valve Cv Sizing Liquids Gases](https://reader033.vdocument.in/reader033/viewer/2022061107/544c51f9b1af9fae558b4a20/html5/thumbnails/21.jpg)
CONVERSIONS :
1 TO CONVERT PRESSURE.
INPUT VALUE IN BARA
FROM Kg/Cm2 (g) 3 3.9551
FROM BAR 1.0130
FROM mm OF wc 10400 1.010
2 TO CONVERT TEMPERATURE.
INPUT
273
/2. Therefore, flow is subcritical.
VALUE IN 0K.
FROM 0 C
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VALUE IN BARA
3.9551
1.0130
1.010 bar
273
VALUE IN 0K.