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Numerous Raschig ring packings stacked together

Pall Ring Packing

Home Products Acidic-Alkali Exhaust Random PackingPall Ring Packing

Acidic-Alkali Exhaust

Pall Ring Packing – High Mass Transfer Efficiency, Low Pressure Drop & High Compatibility

Pall ring packing is a common type of random tower packing, developed on the basis of Raschig ring packing Raschig Ring Packing. These open-ring packings share equal height and diameter, featuring five inwardly curved tongues (or "windows") on each layer. The tongues are bent toward the center of the ring, and the windows are staggered between upper and lower layers. The total open area typically accounts for about 30% of the ring’s wall surface. It offers excellent gas-liquid distribution and mass transfer efficiency, making it one of the most widely used industrial packings.

A metal pall ring packing placed on a flat surface

Features

High mass transfer efficiency. The open structure increases the gas-liquid contact area, while internal turbulence tongues ensure thorough mixing and dispersion of gas and liquid on the packing surface, thus enhancing mass transfer performance.
High porosity and low pressure drop. The optimized structural design typically achieves a porosity above 90%, resulting in low resistance to gas flow and reduced operating energy consumption, making it suitable for high airflow systems.
Uniform gas-liquid distribution. The porous structure facilitates gas dispersion and even liquid distribution, preventing 'wall flow' and 'channeling', thus improving operational efficiency.
High anti-clogging capacity. With its open structure, pall ring packing is less prone to liquid or dust accumulation, suitable for operating conditions involving particulates or viscous materials.
Flexible material options. Available in PP, PVC, stainless steel, ceramic, and other materials to meet diverse temperature, corrosion, and pressure needs.

Specifications

Table 1: Plastic Pall Ring Packing Specifications
Dimensions	Dry Packing Factor (m^-1)	Specific Surface Area (m²/m³)	Porosity (%)	Packing Density (pcs/m³)	Bulk Density (kg/m³)
Ø16	376	274	90	177000	91
Ø25	283	213	91	48000	85
Ø38	200	151	91	15800	82
Ø50	128	100	92	6300	76
Ø76	92	72	92	1800	73

Table 2: Ceramic Pall Ring Packing Specifications
Dimensions	Thickness (mm)	Specific Surface Area (m²/m³)	Porosity (%)	Packing Density (pcs/m³)	Bulk Density (kg/m³)
Ø25	3	210	73	53000	700
Ø38	4	180	75	13000	630
Ø50	5	130	78	6300	600
Ø80	8	110	81	1680 (random packing)	590
Ø80	8	110	81	1960 (structured packing)	690

Table 3: Metal Pall Ring Packing Specifications
Dimensions	Thickness (mm)	Specific Surface Area (m²/m³)	Porosity (%)	Packing Density (pcs/m³)	Bulk Density (kg/m³)	Dry Packing Factor (m^-1)
Ø16	0.3	239	92.8	143000	275	299
Ø25	0.4	219	93.4	55900	290	269
Ø38	0.6	129	94.5	13000	275	153
Ø50	0.8	112	94.9	6500	315	131
Ø76	1.0	72	95.1	1830	320	84