Control Valve Sizing Calculator (Online)
Professional control valve sizing — 4 conditions, 4 fluid types, 9-level cascade selection
Fill in parameters and click Calculate
About This Calculator
Professional control valve sizing per IEC 60534 / ISA S75. Supports liquids, gases, steam, and two-phase flow.
Calculates Cv (Kv), flow regime, cavitation, valve opening, and matching valve selection for up to 4 operating conditions.
Standards: IEC 60534-2-1 · ISA S75.01 · IEC 60534-8-3
FAQ
What is Cv?
Flow coefficient — GPM of water at 60°F with 1 psi drop. Higher Cv = more capacity.
What is choked flow?
Flow limited by fluid properties when ΔP exceeds a critical value.
What is cavitation?
Vapor bubbles form/collapse when local pressure drops below vapor pressure, causing damage.
Ideal valve opening?
20-80%. Below 10% = oversizing; above 90% = undersizing.
Contact
Our engineers can help you select the right control valve and verify sizing against process conditions.
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