Reduced Seated Valves and Fittings Calculator

Enter value and click on calculate. Result will be displayed.


K = K Value of the Total Valve
K1 = K Value of Reduced Seat
β = dvalve / dpipe
KR = K Value of Reducer
KE = K Value of Enlarger

K Value of Reduced Seat:
K Value of Reducer:
K Value of Enlarger:
β :
K Value of the Total Valve:

A Reduced Seated Valves and Fittings Calculator is typically used in fluid dynamics, pipe systems, or industrial applications to determine the proper sizes and pressures for valves and fittings that have a reduced seating area. These are often used in applications where the flow needs to be controlled or restricted at specific points in the pipeline.

Parameters for Calculation

For reduced seated valves and fittings, the calculator usually needs to handle the following parameters:

  1. Flow Rate (Q) – The volume of fluid flowing through the valve/fitting (typically in GPM, L/min, or cubic meters per hour).
  2. Valve Size – The nominal size of the valve (typically in inches or millimeters).
  3. Pressure Drop (ΔP) – The difference in pressure across the valve or fitting.
  4. Cv (Flow Coefficient) – A measure of the capacity of the valve, indicating how much flow it can pass given a specific pressure drop.
  5. Type of Valve/Fitting – This determines the characteristics (e.g., ball valve, gate valve, check valve).
  6. Fluid Type – This helps determine viscosity and other flow characteristics.