Raschig rings

Raschig rings


The Raschig rings are plastic pieces (approximately equal in length and diameter) used in large amounts, as layers on perforated grills in CO2 outgas columns for degassing or other chemical processes. They offer a large area of interaction between the liquid and the gas or vapors in the entire volume of the column. The Raschig rings are made of different plastics injection materials: polystyrene, ABS copolymer or high-density polyethylene. The Raschig rings are made in a single size.

Conditions of use:
– Working fluid: non-corrosive and non-oxidant for plastic materials, usually decarbonated water (pH = 1 ÷ 5), air and CO2
– Maximum working pressure: 10 bar
– Maximum operating temperature: 80° C

Note: At ordering, it must be specified the required quantity in m3 (not in pieces) and the manufacturing material.

Individual characteristics

Nominal transfer surface

55 cm²


Ø25 x 25

Net weight

2,75 grams (for PP or PEID)


Bulk characteristics, for a volume of 1m3

Number of pieces

aprox. 55.000 buc/m³

Total contact surface

305 m²/m³

Free volume

0,710 m³/m³


150 kg/m³ (for PP or PEID)

Dimension of slot or hole for the mounting grill

18 mm

Storage, acclimatization

no need

ISCIR Control