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) =

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.

0.000 bar

TO CONVERT PRESSURE.

INPUT VALUE IN BARA

1.0130

1.0130

TO CONVERT TEMPERATURE.

INPUT

273

VALUE IN 0K.

SHEET FOR VALVE SIZING CALCULATIONS.

CONDITION - FLOW MEDIUM LIQUID / VOLUMETRIC FLOW.

INPUT DATA

1 SERVICE FLUID LIQUID

2 7

3 8

4 6

5 DELTA P - SIZING (BAR) 2

6 283

7 SPECIFIC GRAVITY (G) 0.86

Since DELTA P < P1/2. Therefore, flow is subcritical.

5.37 0.00 0.00

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) =

Gr = G x ( 288 / T ) = 0.875

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.

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

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) =

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.

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

bar

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) =

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

q 4740 6420 5580.0032 36 34.0

q1 q2 q3

CV

CV1 CV2

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

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) =

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.

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

bar

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

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

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

VALUE IN BARA

3.9551

1.0130

1.010 bar

273

VALUE IN 0K.