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Raschig Ring Packing

Home Products Acidic-Alkali Exhaust Random PackingRaschig Ring Packing

Acidic-Alkali Exhaust

Raschig Ring Packing – Cost-Effective and Corrosion-Resistant, Compatible with Various Absorption Towers

Raschig ring packing is one of the earliest developed and most widely used types of random packing. It consists of cylindrical elements with equal height and diameter, featuring a simple structure, easy fabrication, as well as excellent heat resistance and chemical stability. Large Raschig rings (with a diameter over 100 mm) are typically stacked in a structured pattern, while those (with a diameter below 75 mm) are typically randomly packed.

Raschig ring packing is mainly utilized in gas-liquid mass transfer processes across chemical, metallurgical, and environmental protection industries, including absorption towers, scrubbing systems, distillation columns, cooling towers, and desulfurization units.

A metal raschig ring packing placed on a flat surface

Features

High mass transfer efficiency. Raschig rings offer high capacity and low resistance, allowing gas and liquid to pass freely with uniform distribution, thereby enhancing mass transfer performance.
Strong anti-clogging capability. With an open structure, Raschig ring packing is less prone to liquid and dust accumulation, making it suitable for conditions involving dust or viscous substances.
Cost-Effective. Featuring a classic structure, simple fabrication and low cost, it is suitable for mass production, and offering excellent cost performance.
Flexible material options. Available in plastic, stainless steel, ceramic, and other materials to meet various temperature, corrosion resistance, and pressure needs.

Specifications

Table 1: Plastic Raschig Ring Packing Specifications
Dimensions	Thickness (mm)	Packing Density (pcs/m³)	Bulk Density (kg/m³)
Ø25	1.0	48500	88
Ø50	1.5	6500	65

Table 2: Ceramic Raschig Ring Packing Specifications
Dimensions	Dry Packing Factor (m^-1)	Specific Surface Area (m²/m³)	Porosity (%)	Packing Density (pcs/m³)	Bulk Density (kg/m³)
Ø6	5249	712	62	3022935	961
Ø12	1903	367	64	377867	881
Ø15–Ø16	900	305	73	192500	750
Ø19–Ø20	837	243	72	109122	730
Ø25	508	190	74	47675	700
Ø38–Ø40	312	121	73	13667	630
Ø50	220	93	81	6000	600
Ø80	280	46	80	1680 (random packing)	590
Ø80	280	46	80	1960 (structured packing)	690
Ø100	172	70	70	1000	812

Table 3: Metal Raschig Ring Packing Specifications
Dimensions	Thickness (mm)	Specific Surface Area (m²/m³)	Porosity (%)	Packing Density (pcs/m³)	Bulk Density (kg/m³)
Ø16	0.3	330	95.1	205000	396
Ø16	0.5	330	91.8	205000	659
Ø25	0.5	216	94.6	55000	432
Ø38	0.8	136	94.6	15000	436
Ø50	0.8	102	95.9	6500	327
Ø76	1.0	57	96.6	1900	276