Control Valves for Water Flow – Kv Sizing & Pressure Drop Calculations

Control valve sizing and pressure drop calculations for water flow applications. Calculate Kv values based on water flow and pressure drop.

Kv Calculation for Water Control Valves

This calculator determines the Kv value for water control valves using the formula:

Kv = q / √(dp)

Where:

  • Kv = Kv flow coefficient
  • q = water flow (m³/h)
  • dp = pressure drop (bar)

Instructions:

  1. Enter the water flow rate in m³/h
  2. Enter the pressure drop in bar
  3. The Kv value will be automatically calculated
Calculator

Inputs

Results

Kv Value--
Pressure Drop (kPa)Pressure Drop (bar)Water Flow (kg/s)Kv Value
10.010.010.36
20.020.020.25
30.030.030.21
40.040.040.18
50.050.050.16
100.10.10.11
200.20.20.08
300.30.30.07
400.40.40.06
500.50.50.05
100110.04
200220.03
300330.02
400440.02
500550.02
100010100.01
200020200.01
300030300.01
400040400.01