Weco Butterfly Valve Sizing Information
Non-Compressible Fluids
Use the following equations to size valves handling liquids.
Where:
=
Flow in Gallons per Minute (GPM)
=
Pressure Drop (PSI)
=
Inlet Pressure (PSIA)
=
Outlet Pressure (PSIA)
=
Specific Gravity of Liquid (Water = 1.0)
=
Valve Coefficient (Refer to Appropriate Table)
The equations listed above are the basis for the Weco sizing nomogram. The nomogram is a method of solving the equations above quickly and simply when the service fluid is water.
Where:
=
500 GPM
=
=
Specific Gravity of Liquid (Water = 1.0)
=
2,020 @ 90° Open (from the Table Below)