Cv Calculations for Eccentric Butterfly-Valves: - Jindal Steel & Power Ltd, Loc:-BARBIL-ODISHA, 4.0 MTPA

PELLETIZING PLANT, PROJECT NO:-44PS 3600, Document no:-44PS3600/J.04/0004/A4

(Refer Micro quotation no:-MPQ-1213-2229R2)

For Tag no:-LV-B01-0804A

Flow rate (q max) = 100000 kg/hr, Flow rate (q norm) = 13100 kg/hr & Flow rate (q min) = 10000 Kg/hr. Inlet Pressure Max (Pin max) =5 Kg/sqcm, Inlet Pressure Norm (Pin norm) = 4Kg/sqcm

Outlet Pressure Max (Pout max) =4.8 Kg/sqcm, Outlet Pressure Norm (Pout norm) =1.8 Kg/sqcm Density: - 1000 Kg/cubic m, Inline Temperature: - 40 Deg C

Pressure drop dP = (Pin max- Pout max) = (5-4.8) = 0.2 Kg/sqcm = 0.2 bar

Q max = q max/ Density = 100000 Kg/hr / 1000 Kg/cubic m = 100 cubic m /hr Q norm = q norm/ density = 13100 Kg/hr / 1000 Kg/cubic m = 13.1 cubic m /hr

N- Numerical constant equal to 0.865 when Q is in cubic m/hr and dP is in bar

Cv- Valve Sizing coefficient:-

Calculated Cv = Q / (N*(SQRT of Pin-Pout))

Cv max = 100 / (0.865* (SQRT of 0.2)) = 263.15

Cv norm = 13.1 / (0.865*(SQRT of 2.2)) = 10.23

Therefore Calculated Cv max is 263.15 USGPM & Cv Norm is 10.23 USGPM

Hence recommended size as per calculations is 3 Eccentric Butterfly Valve. Valve Cv at Fully open condition i.e. 100% opening is 312 USGPM.

For Tag no:-LV-B01-0804B

Flow rate (q max) = 100000 kg/hr, Flow rate (q norm) = NIL & Flow rate (q min) = 10000 Kg/hr. Inlet Pressure Max (Pin max) =5 Kg/sqcm, Inlet Pressure Norm (Pin norm) = 4Kg/sqcm

Outlet Pressure Max (Pout max) =4.8 Kg/sqcm, Outlet Pressure Norm (Pout norm) =1.8 Kg/sqcm Density: - 1000 Kg/cubic m, Inline Temperature: - 40 Deg C

Pressure drop dP = (Pin max- Pout max) = (5-4.8) = 0.2 Kg/sqcm = 0.2 bar

Q max = q max/ Density = 100000 Kg/hr / 1000 Kg/cubic m = 100 cubic m /hr

N- Numerical constant equal to 0.865 when Q is in cubic m/hr and dP is in bar

Cv- Valve Sizing coefficient:-

Calculated Cv = Q / (N*(SQRT of Pin-Pout))

Cv max = 100 / (0.865* (SQRT of 0.2)) = 263.15

Therefore Calculated Cv max is 263.15 USGPM

Hence recommended size as per calculations is 3 Eccentric Butterfly Valve. Valve Cv at Fully open condition i.e. 100% opening is 312 USGPM.

For Tag no:-LV-B07-5363

Flow rate (q max) = 93000 kg/hr, Flow rate (q norm) = NIL & Flow rate (q min) = 21000 Kg/hr. Inlet Pressure Max (Pin max) = 3.5 Kg/sqcm, Inlet Pressure Norm (Pin norm) = 3Kg/sqcm

Outlet Pressure Max (Pout max) = 3.3 Kg/sqcm, Outlet Pressure Norm (Pout norm) =1.8 Kg/sqcm Density: - 1000 Kg/cubic m, Inline Temperature: - 40 Deg C

Pressure drop dP = (Pin max- Pout max) = (3.5-3.3) = 0.2 Kg/sqcm = 0.2 bar

Q max = q max/ Density = 93000 Kg/hr / 1000 Kg/cubic m = 93 cubic m /hr

N- Numerical constant equal to 0.865 when Q is in cubic m/hr and dP is in bar

Cv- Valve Sizing coefficient:-

Calculated Cv = Q / (N*(SQRT of Pin-Pout))

Cv max = 93 / (0.865* (SQRT of 0.2)) = 244.73

Therefore Calculated Cv max is 244.73 USGPM

Hence recommended size as per calculations is 3 Eccentric Butterfly Valve. Valve Cv at Fully open condition i.e. 100% opening is 312 USGPM.

For Tag no:-LV-B01-2306

Flow rate (q max) = 35000 kg/hr, Flow rate (q norm) = 18000 kg/hr & Flow rate (q min) = 8000 Kg/hr. Inlet Pressure Max (Pin max) =5 Kg/sqcm, Inlet Pressure Norm (Pin norm) = 3.5 Kg/sqcm

Outlet Pressure Max (Pout max) =4.8 Kg/sqcm, Outlet Pressure Norm (Pout norm) =1.5 Kg/sqcm Density: - 1000 Kg/cubic m, Inline Temperature: - 40 Deg C

Pressure drop dP = (Pin max- Pout max) = 0.2 bar

Q max = q max/ Density = 35000 Kg/hr / 1000 Kg/cubic m = 35 cubic m /hr Q norm = q norm/ density = 18000 Kg/hr / 1000 Kg/cubic m = 18 cubic m /hr

N- Numerical constant equal to 0.865 when Q is in cubic m/hr and dP is in bar

Cv- Valve Sizing coefficient:-

Calculated Cv = Q / (N*(SQRT of Pin-Pout))

Cv max = 35 / (0.865* (SQRT of 0.2)) = 92.10

Cv norm = 18 / (0.865*(SQRT of 2.0)) = 14.75

Therefore Calculated Cv max is 92.10 USGPM & Cv Norm is 14.75 USGPM

Hence recommended size as per calculations is 2 Eccentric Butterfly Valve. Valve Cv at Fully open condition i.e. 100% opening is 152.5 USGPM