What is Gas Filling & Recovery?
Gas filling transfers gas from a large bulk source into cylinders at target pressure. Recovery pulls gas back from cylinders or systems for reuse or disposal. Used for O₂, N₂, CO₂, Ar, H₂ and fire suppression agents.
Filling stations must control pressure precisely and weigh to verify fill quantity. Recovery prevents gas waste and environmental release. Both are regulated for compressed gas safety.
Key terms: filling pressure (target cylinder pressure), recovery rate (gas reclaimed per cycle), vacuum pre-fill (removing air before filling to ensure purity).
Manual vs Electric vs Air-Driven
Drive methods differ sharply in pressure limit, explosion safety, and automation.
| Drive Method | Pressure Limit | Explosion-Proof | Features |
|---|---|---|---|
| Manual pump | ~100 MPa | ✓ (no electricity) | Cheap / labor-intensive / no automation |
| Electric pump | ~300 MPa | Needs Ex motor | Automated / needs power / heat |
| Air-driven pump | ~600 MPa [TBC] | ✓ (pneumatic) | Safe / auto hold / no power |
For gas filling, air-driven boosters = precise pressure + no spark + reliable.
SUNCENTER Equipment for This Process
Gas Filling Machine
O₂/CO₂/N₂/Ar filling with weigh.
Gas Recovery System
Reclaim gas from cylinders/systems.
Nitrogen Charging Unit
Purge & fill with N₂.
Process Flow Diagram
Flow subject to technical-dept. confirmation
Connect
Cylinder to filling port.
Vacuum
Remove air for purity.
Fill
Boost gas to target pressure.
Weigh
Verify fill quantity.
Seal
Close valve, disconnect.
Typical Parameters
Values per product manual — for reference only.
| Workpiece | Test / Working Pressure | Recommended Model |
|---|---|---|
| O₂ cylinders | 15-20MPa | O₂ filling machine |
| CO₂ cylinders | 5-15MPa | CO₂ charger |
| Fire agents (FM200) | 2.5-4.2MPa | Agent filling system |
Further Reading
Blog system under construction — titles below are planned.
- Gas filling station: what pressure and how to control itTBC
- Why vacuum before filling matters for purityTBC
- Gas recovery: save money and stay compliantTBC
Need Gas Filling & Recovery equipment?
Tell us your working conditions and target pressure — our engineers recommend the right model.