Explore our primary chemical packing configurations manufactured under rigorous ISO quality control systems for worldwide delivery.
China Acid & Heat Resistant Ceramic Intalox Saddle Packing, 16-76mm High Efficiency Mass Transfer Ring
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China 304 316L Stainless Steel Metal Trough Liquid Distributor for Uniform Liquid Distribution
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Wholesale High quality stainless steels metal wire gauze structured packing for gas-liquid separation
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Wholesale 304 316L Stainless Steel Metal Dixon Ring (Theta Ring) Wire Mesh Random Packing
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In mass transfer operations such as absorption, stripping, rectification, and gas scrubbing, the choice of column packing directly governs operational efficiency, energy consumption, and capital expense. Plastic Pall Rings represent a major evolutionary advancement over first-generation Raschig rings. By punching inwardly curved fingers or tabs into the cylindrical wall of the ring, the structural integrity is maintained while opening up the interior volumetric space. This open-wall geometry enables continuous gas-liquid contact across both the inner and outer surfaces of the ring, dramatically reducing liquid pooling and gas channel friction.
The presence of internal open windows allows vapor and liquid to pass freely through the packing matrix. This results in a 30% to 50% lower pressure drop per meter of packing height compared to solid-walled Raschig rings of identical diameter. Furthermore, the interior tabs act as continuous droplet contactors and liquid redistributors, which continuously disrupt liquid film development and suppress wall flow tendencies. Consequently, the Height Equivalent to a Theoretical Plate (HETP) is significantly reduced, permitting shorter overall column designs and lower investment costs for new process plant builds.
The internal bent vanes split vapor streams continuously while promoting surface wetting. Liquid films are constantly renewed, maximizing the effective interfacial area ($a$) available for chemical absorption.
Formulated with virgin engineering resins (PP, RPP, PVDF, PE, PVC), our plastic pall rings withstand substantial compressive loads at elevated operating temperatures without crushing or deformation.
Unlike metallic packing vulnerable to pitting or oxidation in wet chlorine and halogenated acids, high-grade polymers remain entirely inert in aggressive aqueous chemical environments.
Selecting the exact thermoplastic polymer grade based on chemical compatibility, continuous service temperature, and environmental stress cracking resistance (ESCR).
| Polymer Material Grade | Abbreviation | Max Temp (°C / °F) | Chemical Resistance Profile | Primary Industrial Applications |
|---|---|---|---|---|
| Polypropylene | PP | 100°C / 212°F | Excellent resistance to aqueous salts, alkalis, mineral acids, and organic solvents. | Water treatment, scrubbing towers, degassing columns, CO2 stripping units. |
| Reinforced Polypropylene | RPP | 130°C / 266°F | Glass-fiber reinforced for higher thermal stability, tensile modulus, and creep resistance. | Hot acid gas absorption, chemical processing towers, chlorine scrubbers. |
| High-Density Polyethylene | HDPE / PE | 80°C / 176°F | Superior low-temperature impact strength, excellent resistance to strong bases and oxidizers. | Brine purification, cold temperature gas stripping, outdoor bio-filter media. |
| Polyvinyl Chloride | PVC | 60°C / 140°F | High rigidity, flame retardant, outstanding resistance to oxidizing acids and aliphatics. | Chlor-alkali plants, wet chlorine towers, potable water degassing systems. |
| Chlorinated Polyvinyl Chloride | CPVC | 90°C / 194°F | Enhanced thermal rating over standard PVC; fire-resistant and structurally robust. | Hot bleach chemical processing, acid recovery, industrial effluent treatment. |
| Polyvinylidene Fluoride | PVDF | 150°C / 302°F | Fluoropolymer with ultimate resistance to nitric acid, wet chlorine, ozone, and harsh aromatics. | Ultra-pure chemical distillation, nuclear waste processing, extreme chemical scrubbers. |
How Pingxiang Zhongtai leverages localized raw material clusters, high-speed automated multi-cavity injection molding, and rigorous batch certification to deliver unmatched value globally.
Located in Pingxiang, Jiangxi Province—recognized worldwide as the foundational capital for industrial chemical packing—Pingxiang Zhongtai Environmental Chemical Packing Co., Ltd. operates integrated manufacturing facilities that streamline the supply chain from raw polymer compound synthesis to final export packaging. By maintaining long-term bulk procurement partnerships with global petrochemical resin suppliers (Sinopec, Sabic, Solvay), we guarantee consistent virgin resin purity free from unsorted post-consumer contamination.
100% virgin polymer feedstocks without unverified recycled regrind. Guaranteed Melt Flow Index (MFI) stability and zero risk of premature environmental stress cracking under chemical stress.
State-of-the-art multi-cavity CNC mold designs with automated robotic ejection. Clean flash-free ring edges eliminate flow turbulence and premature liquid entrainment.
Every batch undergoes radial compressive force testing (ASTM D695 standard) to ensure packed bed columns can withstand deep packing heights without crushing lower layers.
Certified under ISO 9001:2015, ISO 14001, and ISO 45001. Full chemical trace documentation and Material Test Reports (MTR) provided with every container shipment.
Engineering sizing data for plastic pall rings across standard industrial dimensions (16mm to 76mm / 5/8" to 3").
| Nominal Size (mm / in) | Dimensions D×H×T (mm) | Specific Surface Area $a$ ($m^2/m^3$) | Void Fraction $\varepsilon$ (%) | Bulk Density (PP) ($kg/m^3$) | Packing Factor $F_p$ ($1/m$) | Piece Count per $m^3$ (Approx.) |
|---|---|---|---|---|---|---|
| 16 mm (5/8") | 16 × 16 × 1.0 | 341 | 87% | 115 | 280 | 225,000 |
| 25 mm (1") | 25 × 25 × 1.2 | 228 | 90% | 84 | 175 | 54,000 |
| 38 mm (1.5") | 38 × 38 × 1.4 | 142 | 91% | 72 | 130 | 15,800 |
| 50 mm (2") | 50 × 50 × 1.5 | 112 | 92% | 60 | 95 | 6,500 |
| 76 mm (3") | 76 × 76 × 2.2 | 74 | 94% | 52 | 65 | 1,950 |
*Note: Custom wall thicknesses ($T$) and specialty polymer resin modifications are available upon client engineering request.
How our wholesale plastic pall rings optimize performance across chemical, environmental, water treatment, and gas processing operations.
In power plants and smelters, PP and RPP Pall Rings scrub sulfur dioxide ($SO_2$), hydrogen chloride ($HCl$), and acid mists from flue gases efficiently without scaling or chemical erosion.
PVDF and CPVC Pall Rings excel in wet chlorine cooling and drying towers where free chlorine gas and concentrated hypochlorite quickly degrade standard metallic packings.
High surface area random packing facilitates high transfer coefficients ($K_L a$) in wastewater ammonia stripping towers and volatile organic compound (VOC) air treatment units.
Polypropylene Pall Rings remove carbon dioxide ($CO_2$), hydrogen sulfide ($H_2S$), and dissolved gases from municipal pre-treatment feeds and boiler feedwater makeup circuits.
In ethylene plants and refinery quench scrubbers, lightweight plastic packings handle high fluid velocities with negligible liquid hold-up and zero risk of thermal stress fracture.
Used as biological support media in municipal odor control bio-scrubbers, providing high surface area for bio-film colonization and high gas permeability.
Streamlined international commerce solutions for EPC contractors, plant turnaround engineers, and chemical distributors.
Procuring industrial tower internals requires strict adherence to project timelines and international packaging standards. Pingxiang Zhongtai provides end-to-end B2B order management, ensuring seamless logistics support from factory gate to job site arrival:
Standard export packaging options include heavy-duty woven super-sacks (Jumbo Bags of 1 $m^3$ capacity), reinforced corrugated cartons on ISPM-15 fumigated wooden or plastic pallets, or sealed steel/plastic drums for sensitive polymers.
We accommodate flexible Incoterms including FOB Shenzhen/Ningbo/Shanghai, CIF destination ports, and door-to-door DDP shipments with full customs clearance management for buyers across Europe, North America, Southeast Asia, and the Middle East.
Each shipment includes complete Certificate of Analysis (COA), Batch Crush Test Reports, ISO compliance certificates, Certificate of Origin (Form E, CO, Form F), and detailed Packing Lists categorized by bed layer.
Expert answers to common process design, material selection, and column sizing inquiries.
Plastic Pall Rings offer a distinct advantage over metal packings in corrosive environments containing hydrochloric acid ($HCl$), hydrofluoric acid ($HF$), or chlor-alkali byproducts where stainless steel suffers severe chloride pitting. Compared to ceramic packings, plastic pall rings have a significantly lower bulk density (approx. 60-80 kg/m³ for PP vs. 500+ kg/m³ for ceramic), which reduces the structural wall thickness and foundation costs of large scrubber columns. Furthermore, plastic packings are non-brittle and eliminate breakage during tower loading or thermal cycling.
Reinforced Polypropylene (RPP) with glass-fiber additives operates continuously up to 130°C (266°F). Polyvinylidene Fluoride (PVDF) is a fluoropolymer engineered for extreme chemical and thermal duties, capable of continuous operation up to 150°C (302°F) while resisting strong oxidizers, hot halogenated acids, and aromatic solvents that degrade lower-tier plastics.
The internal stamped fingers open up the inner diameter of the ring, creating an unobstructed core for vapor flow. This open area raises the bed void fraction ($\varepsilon$) above 90%, allowing higher gas capacity ($F$-factor) before approaching flooding velocity. The hydraulic pressure drop ($\Delta P/Z$) is reduced by up to 45% compared to closed-wall Raschig rings, enabling columns to operate at higher gas and liquid throughputs without liquid entrainment.
To prevent severe liquid channeling along the column walls, the ratio of column diameter ($D$) to nominal packing size ($d$) should ideally be greater than 10:1 (preferably 15:1). For example, a 50mm (2") plastic pall ring is recommended for towers with an inner diameter of 500mm or larger. For deep beds, intermediate liquid redistributors should be installed every 3 to 5 column diameters or maximum 6 meters of un-redistributed packing height.
We enforce strict raw material QA protocols. Every incoming shipment of raw polymer pellets (PP, PE, RPP, PVDF) undergoes Melt Flow Index (MFI) testing, density verification, and Differential Scanning Calorimetry (DSC) thermal analysis. We certify 100% virgin polymer feedstock compliance in our batch Quality Certificates, ensuring zero contamination from degraded or incompatible recycled plastics.
Standard empirical packing factors ($F_p$, expressed in $1/m$ or $ft^{-1}$) for Plastic Pall Rings are: 16mm ($F_p \approx 280 /m$), 25mm ($F_p \approx 175 /m$), 38mm ($F_p \approx 130 /m$), 50mm ($F_p \approx 95 /m$), and 76mm ($F_p \approx 65 /m$). Engineers use these empirical coefficients in the Generalized Pressure Drop Correlation (GPDC) charts to calculate column flooding percentage and operating pressure drop.
Discover our comprehensive lineup of ceramic, metal, carbon graphite, and molecular sieve tower media.
China Acid & Heat Resistant Ceramic Intalox Saddle Ring Random Tower Packing 16mm-76mm
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China 304 316L Stainless Steel Liquid Collector and Distributor / Liquid Redistributor
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Wholesale 304 316L Stainless Steel Metal Floating Valve Tray (F1/V1 Type) for Distillation
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