Key Features
- Cylindrical Shape: Easy to manufacture and robust under column loading.
- Variable Configurations: Smooth Raschig ring, slotted rings (Pall, FlexiRings), or structured “I” packs.
- Modular Packing: Can mix different ring sizes or types in a single column to tune performance.
Benefits
- Proven Technology: Well-understood pressure drop and transfer coefficients.
- Adaptable: Range from very cheap (smooth rings) to very efficient (Pall rings, FlexiRings).
Applications
- Basic Gas Scrubbers: Rough packing for large gas flows.
- Refineries: Non-critical fractionators may use simple ring packings.
Technical Specifications
- Surface Area & Voidage: Varies by type (see Pall Ring specs above).
- Installation: Usually poured randomly or lightly packed by vibration.
Unique Selling Points (USPs)
- Versatility: Can be used wherever the process warrants (select ring type by pressure, temperature, media).
- Availability: Widely available from plastic and metal suppliers worldwide.