Vacuum Distillation Column Pressure Control
Calculates the required pressure setpoint and valve flow coefficient (Cv) for a vacuum distillation column vent line under choked flow conditions.
📖 Need the theory? Read the methodology, assumptions, and equations in the full reference guide.
1. Define Input Parameters
2. Engineering Output
Saturation Pressure (P_sat)
- mmHg
- mmHg
Pressure Setpoint (P_set)
- atm
- atm
Valve Inlet Pressure (P1)
- psia
- psia
Mass Flow in lb/h (m_dot_lb)
- lb/h
- lb/h
Top Temperature Rankine (T_R)
- °R
- °R
Choked Flow Factor (F)
- dimensionless
- dimensionless
Valve Flow Coefficient (Cv)
- dimensionless
- dimensionless
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This calculation assists process engineers in sizing pressure control valves for vacuum distillation systems to ensure stable overhead pressure. By determining the saturation pressure and accounting for non-condensable gas loads, the model ensures that the system maintains the necessary vacuum levels for effective separation while preventing thermal degradation.
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