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
= dvalve / dpipe
KR = K Value of Reducer
KE = K Value of Enlarger

Enter your values:
K Value of Reduced Seat:
K Value of Reducer:
K Value of Enlarger:
K Value of the Total Valve:

Reduced seated valves are broken down into three sections: the reducer (contraction) section, the valve section, and the enlarger section.

A K value is determined for each section in relation to the size of the valve in the pipeline.

The total K value for the valve consists of K values for the reducer, the valve section, and the enlarger. Since the K value for the valve section is dependent on the valve seat diameter instead of the pipeline diameter, it must be adjusted by a correction factor to determine the correct K value for the diameter of the pipe.

The valve correction factor is the ratio of valve seat diameter divided by pipeline diameter (often called beta) raised to the fourth power.