Teller Rosette
Ring

The plastic rosette ring was introduced by Teller A. J. (United States, 1954) and is known as the Teller rosette ring. Its main features are high voidage and resistance to plugging, together with high capacity and low resistance; the gaps in the packing hold a relatively high liquid holdup, so liquid stays longer in the tower, increasing gas–liquid contact time and mass-transfer efficiency. It was first studied and introduced by the former Ministry of Metallurgical Industry for metallurgical duty.

Request a Quote Technical Details

Φ25 – 145 mmNominal size

269 m²/m³Surface area

82 – 95%Void space

PP · stainlessMaterial

White polypropylene Teller Rosette Ring, an open rosette of radiating vanes inside a toothed outer ring

Type

Random tower packing

Nominal size

Φ25 mm – Φ145 mm

Surface area

up to 269 m²/m³

Void space

82 – 95%

Material

PP; other resins & stainless steel on request

Price

On request

Why this media

High void space,
long contact time

The geometry does the work: the vane rings open the bed up so gas passes through easily, while the pockets between them hold liquid back so the two phases have time to exchange.

High void space, low pressure drop

Void space runs from 82% at Φ25 mm to 95% at Φ145 mm, so the bed offers a large open path for the gas. Pressure drop, fan power and the risk of flooding all stay low across the packed height.

High liquid holdup

The gaps between the radiating vanes hold liquid in the bed, so a given volume of liquid stays inside the packing longer. Gas and liquid therefore have a longer contact time, which is what raises the mass-transfer efficiency of the column.

Resists plugging, easy to reuse

The frame has no fine openings and no continuous flat plate where solids can settle, so the bed resists plugging and nesting. It is also easy to unload, wash and re-load, which is why it is used in both new columns and repacking work.

Specifications

Technical parameters

Specification / mm × mm	Wall thickness / mm × mm	Bulk density / kg/m³	Surface area / m²/m³	Void space / %	Dry packing factor / m⁻¹	Packing count / pcs per m³
25 × 9	1.5 × 2	90	350	92	300	180,000
51 × 19	3 × 3	63	219	92	250	52,000
73 × 28	3 × 4	61	150	93	150	12,800
95 × 37	3 × 6	58	112	95	130	6,500
145 × 48	3 × 8	55	70	95	80	1,860

Structure	Rings of radiating vanes built around a central hub, held in an outer ring — the whole body is a single open moulding with no flat plate
Nominal sizes	Φ25 mm / Φ51 mm / Φ73 mm / Φ95 mm / Φ145 mm; other diameters on request
Material	Polypropylene (PP) as standard; RPP, PVC, CPVC, PVDF and stainless steel on request. Both white and semi-transparent PP are shown in the gallery below
Bulk density	On request — published figures for this packing class differ widely between suppliers for the same nominal size, so we state the value we can guarantee for your batch instead of quoting a nominal one
Service temperature	On request — set by the resin; PP is normally limited to ≤100 ℃
Service life	On request — depends on the medium, the temperature and the operating cycle
Application	Waste-gas scrubbing and absorption towers; stripping, degassing and deaeration; odour control; cooling towers
MOQ / price	On request — confirm size, material, quantity & destination

Surface area, void space, packing count, dry packing factor and dimensions above are the figures published for this packing class in industry vendor literature. Published values do not always agree: packing count is quoted as 170,000 and 175,000 pieces per m³ for Φ25 mm and as 3,600 and 3,900 pieces per m³ for Φ95 mm, surface area for Φ25 mm is also quoted as 195 m²/m³ by one source, and bulk density for the same nominal size ranges from about 46 kg/m³ to 128 kg/m³ across sources. The ranges shown above are the figures supported by the majority of sources; every parameter we can guarantee is confirmed against the order, and anything we cannot confirm is stated on request rather than quoted. Send us the duty and we will state them.