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Pingxiang Daier Separation TechSep 3, 202617 min read

Metal Pall Ring vs Metal Cascade Mini Ring: Which Random Packing Should You Select?

Metal Pall Ring and Metal Cascade Mini Ring are not interchangeable random packings. DAIER's catalog-confirmed data show that similarly sized models can have comparable surface area and void fraction while exhibiting very different packing factors, making CMR particularly relevant where hydraulic openness is a real project constraint, while Pall Ring remains valuable for standardized and lower-risk replacement.
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Pingxiang Daier Separation TechSep 3, 202617 min read

Plastic Ralu Ring Size Selection: 15 vs 25 vs 38 vs 50 vs 90 vs 125 mm

Plastic Ralu Ring is available in DAIER's catalog-verified 15–125 mm series, with specific surface area decreasing from approximately 320 to 60 m²/m³ and packing population decreasing from about 170,000 to 800 pieces/m³. Because void fraction and bulk density are strongly non-monotonic—and current verified data do not provide packing factor—final size selection should rely on actual model data, tower diameter, process hydraulics, fouling conditions and polymer compatibility rather than generic size assumptions.
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Pingxiang Daier Separation TechSep 3, 202617 min read

Plastic Teller Rosette Size Selection: 25 vs 47 vs 51 vs 59 vs 73 vs 95 vs 145 mm

Plastic Teller Rosette is available in DAIER's catalog-confirmed 25–145 mm series, with void fraction increasing from approximately 82% to 95% and packing factor decreasing from 488 to 76 m⁻¹. Because the internal rosette configuration changes between models and some physical properties are non-monotonic, final selection should consider exact geometry, mass-transfer demand, hydraulics, fouling, tower diameter and polymer compatibility rather than using size alone.
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Pingxiang Daier Separation TechSep 3, 202616 min read

Metal Nutter Ring Size Selection: 18 vs 25 vs 38 vs 50 vs 65 vs 76 mm

Metal Nutter Ring is available in DAIER's catalog-confirmed 18–76 mm series, with specific surface area decreasing from approximately 230 to 59.6 m²/m³ and dry packing factor decreasing from 244.7 to 61.9 m⁻¹. Final size selection should balance mass-transfer demand, hydraulic capacity, fouling, tower diameter, alloy selection and support-grid compatibility while using the actual supplier-specific free-volume and bulk-density data.
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Pingxiang Daier Separation TechSep 3, 202616 min read

Metal Intalox Saddle Size Selection: 15 vs 25 vs 40 vs 50 vs 60 vs 70 mm

Metal Intalox Saddle / IMTP is available in DAIER's catalog-confirmed 15–70 mm series, with surface area decreasing from approximately 275 to 61 m²/m³ while free volume rises to about 98.7% and dry packing factor falls from 304.9 to 63.5 m⁻¹. Final size selection should balance mass-transfer demand, hydraulic capacity, fouling, tower diameter, metal grade and retrofit compatibility.
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