ER 55XX RX
Electrofused spinel (MgAl2O4)
Checker packing material for high efficiency regenerator.
Typically used in the middle and bottom part of the checker packing where condensation takes place.
Dedicated to regenerator packing of furnaces operating under reduced conditions.
CRUCIFORM® types

Type 2
Typical application
CRUCIFORM® Type 2 is 40mm thick to reinforce resistance to corrosion.
ER 55XX RX Type 2 is used in the middle and bottom part of the checker packing operating under reduced conditions and with high corrosion level in the condensation area.
Flue size: 130x130mm up to 170x170mm
Shape | Weight |
---|---|
X shape: ER 55XX X2 | 18.5kg |
T shape: ER 55XX T2 | 14kg |
L shape: ER 55XX L2 | 10kg |
Type 3
Typical application
CRUCIFORM® Type 3 is 30mm thick with a high heat exchange surface.
ER 55XX RX Type 3 provide its best thermal performance when installed in the bottom part of the checker packing and is used in checker packing operating under reduced conditions.
Flue size: 140x140mm up to 180x180mm
Shape | Weight |
---|---|
X shape: ER 55XX X3 | 19.5kg |
T shape: ER 55XX T3 | 15kg |
L shape: ER 55XX L3 | 11kg |
Type 4
Typical application
The unique corrugated shape of CRUCIFORM® Type 4 optimize the convection heat exchange for higher efficiency.
ER 55XX RX Type 4 is typically used in the middle part of the regenerator packings operating under reduced conditions.
Flue size: 140x140mm up to 180x180mm
Shape | Weight |
---|---|
X shape: ER 55XX X4 | 20kg |
T shape: ER 55XX T3 | 15kg |
L shape: ER 55XX L3 | 11kg |
Chemical and physical properties
Microstructure

Typical chemical composition
Typical crystallographic analysis
Physical characteristics
Description | International standards | British standards |
---|---|---|
Cold crushing strength | 80MPa | 11,603psi |
Refractoriness under load of 2.105Pa | 1,750°C | 3,182°F |
Typical bulk density | 2.9g/cm3 | 181pcf |
Instructions of use
Installation instructions
CRUCIFORM® Tutorial: How to install cruciform checkerpack

Storage
The electrofused spinel (MgAl2O4), ER 55XX RX solution must be stored in a dry environment protected from weather conditions.
Related products
ER 1682 RX
Electrofused alumina-zirconia-silica (AZS) with 30% zirconia
Checker packing material for high efficiency regenerator.
Typically used in the middle and bottom part of the checker packing where sodium sulphate condensation takes place.
Dedicated to regenerator packing of furnaces producing sodalime glass under non-reduced conditions.
ER 5312 RX
Electrofused ß"' alumina (15Al2O3, 4MgO, Na2O)
Electrofused ß"' alumina is extremely resistant to alkali vapor environments. Dedicated to upper part of the checker packing for high efficiency regenerator.