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113 80 330 FD 202 - Rev1 17

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Nº Rev.

CALCULATION SHEET MC-2041118-001-CB 0


CUSTOMER: SHEET:
SIEMENS LTDA. 2 of 6
TITLE:

CONTROL VALVE
v.2.0.0.0
Valve/Regulator Sizing Calculation
Customer: SIEMENS LTDA Emerson Process Mgt Brazil
Contact: Contact: Diego Domingues
Customer Reference: Projeto Galvani - Siemens Sales Office Reference: Lead Time:
Item: 1 Rev: Qty: 1 Quote: 122-DD-161212-0029190/(No Name Rev: 3
Assigned)
Tags: 113-330-PV-024 Date Last Modified: 02/15/2017
Description: NPS 2 HPS 667 Size 40i 67CF Series Acc
Service Description: Válvula de controle de selagem posterior

Sizing Type: Ideal Steam Flow is Turbulent Solving for: Cv Noise is IECAerodynamic Flow is Mass
Variable Name Units Minimum Normal Maximum
SERVICE & SIZING
Inlet Pressure (P1) kg/cm2g 48.30000 48.30000 53.00000
Outlet Pressure (P2) kg/cm2g 2.10000 2.10000 2.20000
Inlet Temperature (T1) deg C 312.0000 399.0000 407.0000
Mass Flow Rate Gas (w) kg/h 272.2000 250.6000 237.6000
Pressure drop ratio factor (Xt) 0.611 0.611 0.611
Pressure Recovery Factor (Fl) 0.960 0.960 0.960
Valve style modifier (Fd) 0.350 0.350 0.350
Atmospheric Pressure psi 14.69 14.69 14.69

Pipe Size Up in 4 4 4
Pipe Schedule Up 80S 80S 80S
Pipe Size Down in 4 4 4
Pipe Schedule Down 80S 80S 80S
Nominal Valve Diameter (dv) in 2.000 2.000 2.000
Aerodynamic Distance (Rn) m 1.000 1.000 1.000

Sizing Coefficient (Cv) 0.624 0.635 0.552


% Open 70 70 66
dP Choked kg/cm2 28.63534 28.63535 31.36344
dP/P1 Valve 0.936 0.936 0.940
Specific heats ratio (gamma) 1.330 1.330 1.330
Molecular Weight/Specific Gravity M 18.010 18.010 18.010
Inlet fluid density (Rho1) kg/m3 20.45 16.72 18.16
Fp 1.00 1.00 1.00

NOISE CALCULATION
Valve/Trim Globe/Angle Globe/Angle Globe/Angle
LpAeTrim1m dB(A) 79 78 78
LpAeOutlet1m dB(A) < 50 < 50 < 50
LpAeValve1m dB(A) 79 78 78
LpAValveRn dB(A) 79 78 78

VELOCITY OUTPUTS
Valve Outlet Area(Ao) in2 2.800 2.800 2.800
M1 Pipe Mach 0.001 0.001 0.001
Mo Valve Mach 0.057 0.059 0.054
M2 Pipe Mach 0.014 0.014 0.013
V1 Pipe m/s 0.4984 0.5614 0.4900
Vo Valve m/s 32.5544 36.5989 33.9251
V2 Pipe m/s 7.9285 8.9135 8.2623
C1 Pipe m/s 599.5784 642.6070 646.4199
Co Valve m/s 567.0098 624.7955 627.5557
C2 Pipe m/s 567.0098 624.7955 627.5557
WARNINGS
Note: The Note: The Note: The
downstream downstream downstream
temperature is temperature is temperature is
estimated on the estimated on the estimated on the
basis of a constant basis of a constant basis of a constant
enthalpy expansion enthalpy expansion enthalpy expansion
across the control across the control across the control
valve. valve. valve.
Item Notes:

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