Key Features
- Slotted Wall Construction: Each ring has several rectangular openings, allowing fluid to flow through the interior surface.
- High Voidage: Typically over 90% open space, ensuring low resistance to flow.
- Large Internal Surface: Inner surface access greatly increases transfer area.
- Multiple Materials: Available in PP, PVC, metal (IMTP rings), or ceramic.
Benefits
- Superior Mass Transfer: Efficient contact means fewer trays needed in a column.
- Robust Design: Strong and crush-resistant, with high fill ratio per column volume.
- Low Energy Use: Low pressure drop saves pumping energy.
Applications
- Petrochemical Distillation: Fractionators and rectifiers.
- Absorption Units: Gas scrubbers for H₂S, ammonia, CO₂ removal.
- Refinery Processes: Sulfur recovery, reforming.
Technical Specifications
- Surface Area: For example, a 50 mm OD Pall Ring has ~205 m²/m³ surface area.
- Voidage: Up to 92–97% depending on size.
- Packing Factor: A measure of packing efficiency; around 85–137 depending on diameter.
Unique Selling Points (USPs)
- Proven Performance: The original random packing introduced decades ago, with reliable data and global availability.
- Enhanced Variants: Newer versions (Pall Ring-1, Pall Ring-2) further tweak geometry for optimized flow.