Vacuum Evaporation Gas Load: Separate Condensable Vapor from Air Leakage

Define the Phase or Process Boundary

GEA's vacuum-system planning document requests condensable vapor and non-condensable gas separately at suction conditions. Condensation can change the load reaching a later vacuum stage. A vessel pressure value alone does not describe that component inventory.

Review a Hypothetical Comparison

Consider an invented boundary with 100 kg/h of condensable vapor reaching a condenser and 2 kg/h of air ingress. Assume the condenser removes 95 kg/h of the vapor; the later gas stage then receives 5 kg/h residual vapor plus 2 kg/h air, or 7 kg/h total. Specifying only the 2 kg/h air misses residual vapor, while treating all 102 kg/h as the downstream load ignores the assigned condensation. Component molecular masses and suction state are still needed to translate this mass record into volume flow.

Keep the Evidence with the Decision

Draw the vessel, condenser and vacuum-stage boundaries. For each one, list components, mass flow, absolute pressure and temperature. Identify where leak estimates and residual vapor estimates originate. Keep initial evacuation of an empty volume separate from steady vapor generation and ingress during operation.

The condensation amount is fictional, not a guaranteed condenser efficiency. No pump model, suction capacity, vacuum level or air-leak acceptance limit is selected by this example.

Which incoming gas component belongs to condensation duty and which continues to the vacuum system?

This blank worksheet is for your own project. It contains no H M machine trial result.

Customer Questions

Primary References

These references support the technical principles discussed in this guide. The worked examples and review questions are educational.

• GEA's vacuum-system planning document
• Reference from hmpharmamachines.com