Control Valve Flow Characteristic Selection
Calculates the required flow coefficient (Cv), choked flow pressure drop, and valve gain for Equal Percentage characteristics to ensure stable process control.
📖 Need the theory? Read the methodology, assumptions, and equations in the full reference guide.
1. Define Input Parameters
2. Engineering Output
Absolute Inlet Pressure (P1_abs)
- bar
- bar
Choked Pressure Drop (dP_choked)
- bar
- bar
Required Flow Coefficient (Cv)
- dimensionless
- dimensionless
Normalized Flow (q_norm)
- dimensionless
- dimensionless
Valve Gain (Gv)
- dimensionless
- dimensionless
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Download Offline Excel CalculationContext & Assumptions
Control valve selection is essential for maintaining a constant loop gain across the operating range of a process. This methodology evaluates the valve's capacity and gain characteristics to compensate for non-linear process dynamics, such as those found in heat exchangers.
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