Plastic High Flow Ring

Plastic high flow ring is a high-capacity random tower packing built for large throughput at a low pressure drop. It is an open cylinder whose wall is cut into staggered vertical strips, with reinforcing ribs across the centre that give it rigidity and strength. That open, ribbed design lets gas and liquid pass freely — the void fraction runs from about 92 to 98 percent — so a column can handle a large flux while staying efficient, and the ribs let the packing carry heavy loads and cope with fouling service. Moulded in PP, RPP, PVC, CPVC or PVDF, it is light and corrosion-resistant. We supply it in 25, 38, 50 and 76 mm.

Open cylindrical ring with staggered vertical strips and central reinforcing ribs.
Very high void fraction (about 92 to 98 percent) for large flux and low pressure drop.
Rigid and strong — carries heavy loads and copes with fouling service.
Moulded in PP, RPP, PVC, CPVC or PVDF; light and corrosion-resistant.
For high-capacity separation, absorption and gas treating. Sizes 25 to 76 mm.

Technial Parameters

Size OD × H × wall (mm)	Bulk density (kg/m³)	Surface area (m²/m³)	Void fraction (%)
25 × 25 × 1.0	70.9	190	92
38 × 38 × 1.3	58	150	94
50 × 50 × 1.5	54	110	96
76 × 76 × 2.5	50	82	98

The 25 mm bulk density appears as 709 in the source; shown here as 70.9 kg/m³ to match the size trend — please confirm before ordering.

Property	Value
Product Type	Plastic random packing (high flow ring)
Material	PP / RPP / PVC / CPVC / PVDF
Model NO.	RJ-1010
Colour	White
Standard Sizes	25, 38, 50, 76 mm
Structure	Open cylindrical ring — staggered vertical strips + central reinforcing ribs
Void Fraction	About 92–98%
Media Temperature	About 60–150 °C (by plastic)
Advantages	Low pressure drop, large flux, high efficiency, rigid, corrosion-resistant
Applications	Separation, absorption, desorption, atmospheric & vacuum columns, amine decarbonization, desulfurization, ethylbenzene & iso-octane separation
Trademark	RONGJIAN
Origin	China
HS Code	8419909000
Transport Package	Carton box / ton bag / steel drum

FAQs

What is a plastic high flow ring, and what makes it high flow?

A plastic high flow ring is a random packing designed for one thing above all: moving a lot of gas and liquid through a column with as little resistance as possible. It is an open cylinder whose wall is cut into staggered vertical strips, and across the middle run reinforcing ribs that stiffen the ring. Two things follow from that shape. First, the ring is very open, with a void fraction that reaches into the high nineties in percent, so flow passes at a low pressure drop and the column can take a large flux. Second, the central ribs make the ring rigid and tough, so it holds its shape under heavy loads and does not clog easily in dirty service. Together those give the high flow ring its name: high throughput, low resistance, good efficiency.

Which separations and gas-treating jobs is it used for?

High flow rings are used where a column must handle a large flow efficiently. Typical duties are separation, absorption and desorption in both atmospheric and vacuum service, and gas-treating jobs such as synthetic amine decarbonization and desulfurization, where big volumes of gas must be scrubbed at a low pressure drop. They also appear in fine petrochemical separations, including ethylbenzene and iso-octane. Because the ring is open and rigid, it suits high-throughput and fouling-prone columns that would blind or flood a denser packing. Wherever capacity and low pressure drop matter more than anything else, the high flow ring earns its place.

Which plastic should I pick, and what temperature does it allow?

Five plastics are available — polypropylene, reinforced polypropylene, PVC, CPVC and PVDF — and each opens up a different temperature and chemical window. Polypropylene covers most everyday acid, alkali and salt service at a low cost; PVC handles cool chlorinated and acidic streams; CPVC extends the heat range; and PVDF is the pick for the hottest or most oxidising duties. In broad terms the media temperature spans about 60 to 150 degrees, rising with the grade. Every one of these resins stands up well to corrosion, which is why the high flow ring is at home in aggressive columns. Give us the fluid, its strength and its temperature and we will name the grade that fits.

How does a high flow ring compare with a Pall ring?

The high flow ring is best understood as a Pall ring taken further toward capacity. A Pall ring gains its extra void from openings in its wall and inward-folded tabs, which already lift its throughput above a plain Raschig ring. The high flow ring opens the structure up more, into mostly vertical strips, and adds central ribs for strength, so it reaches a higher void, a larger flux and a lower pressure drop than a Pall ring of the same size, while staying rigid enough for heavy or dirty loads. The trade is that a Pall ring is cheaper and perfectly good for ordinary duties; the high flow ring is worth its extra cost when capacity, vacuum operation or fouling is the limiting factor. Tell us the column and the bottleneck and we will advise which to use.

The high flow ring is a capacity-first random packing. Where a Raschig ring is a closed cylinder and a Pall ring adds windows and tabs, the high flow ring goes further still: its wall is opened into staggered vertical strips, and reinforcing ribs run across the centre to keep it stiff. The result is a very open, very light ring, with a void fraction in the mid-to-high nineties in percent, that lets a column pass a large flux at a low pressure drop, yet is rigid enough to bear heavy beds and shrug off fouling. It is moulded in PP, RPP, PVC, CPVC or PVDF, so the resin can be matched to the chemistry, and it works in media roughly between 60 and 150 degrees.

Its high-capacity character shows in the duties it is chosen for:

Where it is used	Why the high flow ring suits it
Amine decarbonization and desulfurization	High void and large flux move big gas volumes at low pressure drop
Atmospheric and vacuum distillation	Low pressure drop is decisive under vacuum and keeps separation sharp
Ethylbenzene and iso-octane separation	High efficiency per metre of bed for close-boiling cuts
Dirty or fouling columns	Open strips and central ribs resist clogging and hold up under load

So the high flow ring is the packing to reach for when throughput, vacuum operation or fouling is what limits a column, rather than when a simple, low-cost fill will do. Against a Pall ring of the same size it offers a higher void, a larger capacity and a lower pressure drop, at a somewhat higher price. Send us the tower diameter, the service and the flow rates, and we will work out the size and resin with you.