02 / TOWER PACKING · RANDOM PACKING
Plastic Random Packing
Corrosion-resistant plastic random packing for absorption, scrubbing and stripping in acid, alkali and water-treatment service — a full range of geometries and polymers.
Plastic random packing
Plastic random packing gives excellent corrosion resistance at low weight and cost, making it the standard choice for scrubbers, absorbers and water-treatment columns in acid and alkali service. PCX supplies the full range of plastic geometries in PP, PVC, CPVC, PVDF and PTFE, sourced from qualified international partners and supplied to your column specification across Thailand. Plastic random packing (พลาสติก) เหมาะกับงานกัดกร่อน scrubber และบำบัดน้ำ ทนสารเคมี น้ำหนักเบา ราคาประหยัด.
Economical industry-standard plastic random packing
Plastic Pall Ring
Economical, versatile industry-standard plastic packing. Two rows of punched holes with inward-folded fingers raise throughput, improve efficiency and lower pressure drop versus ceramic packing. Higher liquid hold-up aids absorption with slow reactions, and the ring-and-spoke construction gives high mechanical strength for deep beds in corrosive service.
- Polypropylene (PP) · glass-filled PP
- LDPE · HDPE
- PVC · CPVC
- PVDF (Kynar) · ECTFE (Halar) · ETFE (Tefzel) · PFA
Applications: absorption, scrubbing and stripping — a versatile, corrosion-resistant alternative to metal Pall rings
Sizes & specifications
| Size | Dimensions (mm) | Surface area (m²/m³) | Void (%) | Pieces / m³ | Bulk density (kg/m³) | Packing factor (m⁻¹) |
|---|---|---|---|---|---|---|
| 5/8″ | 16 × 16 × 1 | 188 | 91 | 180,000 | 141 | 275 |
| 1″ | 25 × 25 × 1.2 | 175 | 90 | 53,500 | 91 | 239 |
| 1.5″ | 38 × 38 × 1.4 | 115 | 89 | 15,800 | 71 | 220 |
| 2″ | 50 × 50 × 1.5 | 93 | 90 | 6,500 | 56 | 127 |
| 3″ | 76 × 76 × 2.6 | 73 | 92 | 1,927 | 60 | 94 |
Temperature limit depends on polymer (roughly 120–160 °C).
Saw-tooth edge saddle packing
Plastic Super Saddle
Saddle-shaped packing with saw-tooth edges in heat- and corrosion-resistant plastics. Low pressure drop, high flux and high efficiency with easy handling — higher capacity and lower pressure drop than ceramic saddles. Relatively high liquid hold-up suits slow reactions, and the self-distributing geometry minimises channeling.
- PE · PP
- PVC · CPVC
- PVDF
Applications: absorption, scrubbing and stripping; pulp-and-paper service such as bleach-plant absorbers — a versatile alternative to ceramic saddles in corrosive duty
Sizes & specifications
| Size | Dimensions (mm) | Surface area (m²/m³) | Void (%) | Pieces / m³ | Bulk density (kg/m³) |
|---|---|---|---|---|---|
| 1″ | 25 mm | 199 | 90 | 57,500 | 91 |
| 1.5″ | 38 mm | 178 | 92 | 18,000 | 72 |
| 2″ | 50 mm | 105 | 93 | 6,400 | 64 |
| 3″ | 76 mm | 89 | 96 | 1,500 | 48 |
Special-purpose PTFE random packing
PTFE Raschig Ring
Special-purpose random packing in PTFE — one of the most chemically stable materials available, resisting virtually all acids and alkalis and stable across roughly −260 °C to +260 °C. The classic ring geometry gives a predictable, well-characterised bed for the most aggressive media.
- PTFE (Teflon)
- PP · PE · PVC
Applications: extreme chemical-resistance service; distillation and chemical processes handling aggressive media such as HF, fuming acids and strong alkalis
Sizes & specifications
| Size | Dimensions (mm) | Surface area (m²/m³) | Void (%) | Pieces / m³ | Packing factor (m⁻¹) |
|---|---|---|---|---|---|
| Dg16 | 16 × 16 × 1.0 | 188 | 91 | 171,000 | 275 |
| Dg25 | 25 × 25 × 1.2 | 175 | 90 | 53,500 | 239 |
| Dg38 | 38 × 38 × 1.4 | 115 | 89 | 13,700 | 220 |
| Dg50 | 50 × 50 × 1.5 | 93 | 90 | 6,500 | 127 |
| Dg76 | 76 × 76 × 2.6 | 73 | 92 | 1,765 | 94 |
Technical data shown are for the PTFE version; other polymers available on request.
Open-celled spiral ring packing
Plastic Heilex Ring
An open-celled random packing, typically injection-moulded in polypropylene, with a spiral configuration that enlarges surface area and void space for better mass transfer. The non-nesting geometry keeps the bed uniformly open — high void ratio, even gas–liquid distribution and low pressure drop.
- Polypropylene (PP) · glass-filled PP
- PVC · PVDF · HDPE
Applications: gas absorption, acid-gas absorption, cooling-tower fill and gas purification
Sizes & specifications
| Size | Dimensions (mm) | Surface area (m²/m³) | Void (%) | Pieces / m³ | Bulk density (kg/m³) | Packing factor (m⁻¹) |
|---|---|---|---|---|---|---|
| 2″ | 50 × 50 | 101 | 94 | 8,000 | 65 | 70 |
| 3″ | 76 × 76 | 55 | 96 | 3,420 | 56 | 87 |
| 4″ | 100 × 100 | 75 | 95 | 1,850 | 48 | 46 |
Floating-ball random packing
Plastic Hollow Floating Ball
Hollow spherical packing with a large contact area, stable chemistry and long service life. High liquid/vapour loading allows a smaller column diameter, with high efficiency, low pressure drop and wide turndown. The free-floating action under gas/liquid flow provides self-agitation and self-cleaning.
- PP · PE
- PVC · PVDF
Applications: salt-eliminating and coagulation water tanks, water treatment; coal-gas washing, fertiliser hot-gas saturation, naphthalene and ammonia washing towers; heat-exchanger and catalyst support media; tower revamps
Sizes & specifications
| Size | Dimensions (mm) | Surface area (m²/m³) | Free volume (%) | Pieces / m³ | Bulk density (kg/m³) |
|---|---|---|---|---|---|
| Ø25 | ø25 × 1.0 | 200 | 42 | 41,500 | 125 |
| Ø38 | ø38 × 1.2 | 150 | 42 | 22,000 | 121 |
| Ø50 | ø50 × 1.5 | 120 | 42 | 10,480 | 73 |
Multi-arm high-performance plastic packing
Plastic Star Ring
High-performance plastic packing with superior efficiency, capacity and pressure-drop characteristics — over 60% higher efficiency and about 20% lower pressure drop than a 3.5″ plastic Pall ring. The multi-arm star geometry maximises surface area and void space in a single symmetrical unit.
- Polypropylene (PP)
Applications: fume scrubbing (acetic acid, ammonia, formaldehyde), acid-gas absorption (HCl, SO₂, H₂S), VOC stripping, wastewater treatment, flue-gas scrubbing
Sizes & specifications
| Size | Surface area (m²/m³) | Void (%) | Pieces / m³ | Bulk density (kg/m³) | Packing factor (m⁻¹) |
|---|---|---|---|---|---|
| Standard (single size) | 100 | 95 | 4,900 | 49 | 117 |
Available in one standard size only.
Multi-leaf spherical packing
Plastic Polyhedral Hollow Ball
Two hemispheres of staggered fan-shaped leaves forming a ball with far more surface area than an ordinary spherical filler. Light weight, wide free space, low wind resistance and a hydrophilic, well-wetted surface — a good balance of surface area, void fraction and pressure drop across a wide size range.
- PE · PP · RPP
- PVC · CPVC
Applications: sewage treatment, flue-gas desulfurization in power plants, oily-water separation, seawater desalination, purified- and waste-water treatment
Sizes & specifications
| Size | Dimensions (mm) | Surface area (m²/m³) | Void (%) | Pieces / m³ | Bulk density (kg/m³) |
|---|---|---|---|---|---|
| Ø25 | Ø25 | 460 | 84 | 64,000 | 70 |
| Ø38 | Ø38 | 312 | 87 | 25,000 | 75 |
| Ø50 | Ø50 | 237 | 90 | 11,500 | 81 |
| Ø76 | Ø76 | 214 | 92 | 3,000 | 59 |
| Ø100 | Ø100 | 261 | 92 | 1,800 | 50 |
Plastic saddle-ring packing
Plastic VSP Ring
A high-performance random packing in corrosion-resistant engineering plastics, designed for the lowest pressure drop in its class. The open saddle-ring form combines a ring’s surface area with a saddle’s self-orienting behaviour for a well-distributed, non-nesting bed.
- PE · PP · RPP
- PVC · CPVC · PVDF
Applications: petroleum refining, chemical engineering, chlor-alkali production, coal-gas processing and environmental protection
Sizes & specifications
| Size | Dimensions (mm) | Surface area (m²/m³) | Void (%) | Bulk density (kg/m³) |
|---|---|---|---|---|
| 25 mm | 25 | 185 | 93 | 60 |
| 50 mm | 50 | 100 | 95 | 45 |
| 90 mm | 90 | 78 | 97 | 30 |
Spiral-filament random packing — types S-O to LL
Rosette Ring Packing
A spiral-filament random packing with excellent mass and heat transfer, high corrosion resistance, low pressure drop and light weight. The open filament shape and large void space cut blower power, while multiple branches give uniform liquid distribution without dead spots. Available in types S-O, S, S-II, M, L, L-II and LL.
- PE (polyethylene)
- PP (polypropylene)
- PVC
Applications: gas absorption (SO₂, SO₃, NH₃, CO₂, H₂S, HCl, Cl₂, HF, NOₓ, solvents), gas stripping, cooling towers, deaerators, reactors; H₂SO₄, chlor-alkali, iron & steel, thermal-power FGD, pulp and water/sewage industries
Sizes & specifications
| Type | Ext. diameter (mm) | Height (mm) | Pieces / m³ | Surface area (m²/m³) | Void fraction (%) |
|---|---|---|---|---|---|
| S-O | 47 | 19 | 32,500 | 185 | 88 |
| S | 51 | 19 | 25,000 | 180 | 89 |
| S-II | 59 | 19 | 17,500 | 150 | 92 |
| M | 73 | 27.5 | 8,000 | 127 | 89 |
| L | 95 | 37 | 3,600 | 94 | 90 |
| L-II | 143 | 48 | 1,180 | 100 | 93 |
| LL | 145 | 48 | 1,100 | 65 | 95 |
Dimensional data are independent of polymer selection.
Frequently Asked Questions
Which plastic random packing should I choose?
The plastic Pall ring is the economical, versatile default. The super saddle, Heilex ring and star ring offer higher performance; the floating ball and polyhedral ball suit water treatment and scrubbing; the PTFE Raschig ring is for the most aggressive media (HF, fuming acids); and the Rosette ring is chosen for high-efficiency acid-gas absorption. Send us your service and we will recommend a type.
What is the temperature limit of plastic packing?
It depends on the polymer. Polypropylene (PP) is generally used to around 100–120 °C, PVDF and CPVC tolerate higher temperatures, and PTFE is stable across roughly −260 °C to +260 °C. Tell us your operating temperature and we will match the polymer.
Which polymer suits my chemistry?
PP for general service, PVC and CPVC for many acids, PVDF (Kynar) for strong oxidisers and higher temperatures, and PTFE for the most aggressive media such as hydrofluoric and fuming acids. Send us the media, concentration and temperature for a recommendation.
Plastic, metal or ceramic random packing — what is the difference?
Plastic packing gives corrosion resistance at low weight and cost but is temperature-limited (roughly 120–160 °C, more for PTFE). Metal offers the highest strength and lowest pressure drop for high-temperature, deep-bed service. Ceramic is inert and handles hot gas and strong acids (except HF). We supply all three families.
Do you supply plastic random packing in Thailand, and how do I get a quotation?
Yes. PCX supplies plastic random packing across Thailand, sourced from qualified international partners and supplied to your specification. Send us the service, geometry, size, polymer and volume — or your column data — and we will return a quotation.
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Send us your requirements — we'll source and supply to your spec.
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