Complete a control valve sizing in minutes — covering liquid, gas, steam, and two-phase Cv/Kv calculations with aerodynamic and hydrodynamic noise prediction, Cv curve analysis, and a printable PDF engineering report.
Start Sizing Now →
Control valve sizing is one of the most frequent — and error-prone — routine tasks in instrumentation engineering. A wrong Cv means cavitation, flashing, excessive noise, poor control quality, and costly rework. This calculator follows internationally recognized standards to deliver engineering-grade results instantly.
IEC 60534 / ISA calculations with choked-flow detection, piping geometry factor (FP), and gas expansion correction (FF) for accurate Cv/Kv results.
Liquid, gas, steam, and two-phase in one tool — each with dedicated property inputs and automatic unit conversion.
Enter MIN, NORM, MAX conditions (plus an optional fourth case) at once — size the valve over its full operating envelope, exactly as in a real project.
IEC 60534-8 automatic aerodynamic (gas/steam) and hydrodynamic (liquid) noise estimation — catch noise issues before the valve is purchased.
Interactive Cv-vs-travel curve with operating points plotted directly — see where each case falls and how much margin remains at a glance.
One-click two-page A4 engineering report with all inputs, results, noise and curve data — ready to attach to data sheets or project files.
From raw process data to a submittable sizing result in four steps.
Enter flow rate, upstream/downstream pressure and temperature for each case. Metric or imperial units — switch anytime.
Select liquid, gas, steam or two-phase service, then fill in the fluid properties — the tool auto-adapts the corresponding input fields.
Required Cv/Kv, choked-flow check, noise prediction and Cv curve — all displayed automatically after calculation, no extra clicks needed.
Print or save a standard two-page A4 PDF report for archiving, data sheets or inquiry documents.
The full interactive tool — liquid, gas, steam, two-phase sizing with noise prediction and PDF report — runs in your browser on the FLOWKS engineering platform.
🚀 Open Control Valve Sizing Tool →