Page 3 - Valve Sizing

VALVE SIZING CALCULATION SHEET Date : 15/09/2019
Sheet 2 of 2
Version : V3.6.0 Date : 22/08/2018
Customer Tag #
Project Segmented Item # #1-[0]
Enquiry Ref. Application
Quotation # Function Control
Item Description Series 31, 4", CL 125/150, Lug
SERVICE AND SIZING Cond1 Cond2 Cond3 Cond4
Process Fluid Name Water
Inlet Pressure (psig) 120 120 120 120
Outlet Pressure (psig) 115 115 115 115
Liquid Flow (gpm (US)) 250 25 450 650
Vapour Pressure (psig) -13.74 -13.74 -13.74 -13.74
Specific Gravity 0.993 0.993 0.993 0.993
Temperature (°F) 100 100 100 100
Pressure Recovery Factor, FL 0.831 0.789 0.786 0.744
Valve Style Modifier Factor, Fd 0.437 0.295 0.494 0.509
Combined Recovery Factor, FLP 0.831 0.789 0.786 0.744
Piping Correction Factor, Fp 1 1 1 1
Critical Pressure Ratio Factor, Ff 0.955 0.955 0.955 0.955

Valve Diameter, d (in) 4" 4" 4" 4"
Inlet Pipe Diameter , D1 (in) 4.5 4.5 4.5 4.5
Outlet Pipe Diameter, D2 (in) 4.5 4.5 4.5 4.5
Cavitation Index, Kc 0.037 0.037 0.037 0.037
Dynamic Torque
Sizing Coefficient, Cv 111 11.1 201 290
Pressure Drop (psid) 5 5 5 5
dP Choked (psid) 92.4905 83.2108 82.7431 74.0089

Noise Calculation
Valve Type Butterfly Butterfly Butterfly Butterfly
Downstream Pipe Size (in) 4 4 4 4
Downstream Pipe Schedule STD STD STD STD
Valve SPL (dBA) 12 < 10 21 26

Velocity
Inlet Velocity (m/s) 1.945 0.195 3.502 5.058
Outlet Pipe Velocity (m/s) 1.945 0.195 3.502 5.058
Valve Velocity (m/s) 1.945 0.195 3.502 5.058

Valve Series : Series 31 % Opening,
Calculated Cv
Valve Size: 4"
A - (44.3,111)
Rated Cv: 841
B - (14.3,11.1)
Flow Char: Equal Percentage
C - (58.4,201)
D - (66,290)

Travel (%) 10 20 30 40 50 60 70 80 90 100
Cv 2.7 22.2 51.5 90.2 140 212.2 340.6 537 715 841