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Numerous Raschig ring packings stacked together

Pall Ring Packing

Home Products Scrubber Internals Random PackingPall Ring Packing

Scrubber Internals

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.

Two plastic pall rings 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
Size	Specific Surface Area (m²/m³)	Void fraction (%)	Bulk number (Pieces/m³)
Ø16	188	91	179000
Ø25	175	90	53500
Ø38	115	89	15800
Ø50	93	90	6500
Ø76	73.2	92	1980
Ø100	52.8	94	1000
Plastic Materials: PP, HDPE, PVC, PPH, CPVC, PTFE, PVDF, PFA

Table 2: Metal Pall Ring Packing Specifications
Size	Specific Surface Area (m²/m³)	Void fraction (%)	Bulk number (Pieces/m³)
Ø6	904	88.6	4000000
Ø10	482	93.8	768000
Ø12	450	94.5	480000
Ø13	415	94.8	410000
Ø16	362	94.9	210000
Ø25	219	95	53000
Ø38	146	95.9	15300
Ø50	109	96	6500
Ø76	71	97	1980
Ø89	61	97.1	1220
Metal Materials: Carbon Steel, Stainless Steel, Copper, Aluminum, Titanium, Hastelloy

Table 3: Ceramic Pall Ring Packing Specifications
Size	Specific Surface Area (m²/m³)	Void fraction (%)	Bulk number (Pieces/m³)
Ø25	220	75	50000
Ø38	150	78	13400
Ø50	120	78	6400
Ø80	75	80	1950