ER 5312 RX
Electrofused ß"' alumina (15Al2O3, 4MgO, Na2O)
Electrofused ß"' alumina cruciform is extremely resistant to alkali vapor environments. Dedicated to upper part of the checker packing for high efficiency regenerator.
CRUCIFORMS® types

Type 2
Typical application
CRUCIFORMS® Type 2 is 40mm thick to reinforce resistance to corrosion.
ER 5312 RX Type 2 is used at the upper part of the regenerator packings operating with high carryover level or high exhaust gas velocities.
Flue size: 130x130mm up to 170x170mm
Shape | Weight |
---|---|
X shape: ER 5312 X2 | 18.5kg |
T shape: ER 5312 T2 | 15kg |
L shape: ER 5312 L2 | 10kg |
Type 4
Typical application
The unique corrugated shape of CRUCIFORMS® Type 4 optimize the convection heat exchange for the higher efficiency.
ER 5312 Type 4 is used at the upper part of the regenerator packings.
Flue size: 140x140mm up to 180x180mm
Shape | Weight |
---|---|
X shape: ER 5312 X4 | 20kg |
T shape: ER 5312 T3 | 15kg |
L shape: ER 5312 L3 | 11kg |
Type 8
Typical application
Half channel CRUCIFORMS® Type 8 for high fuel efficiency regenerator.
Increased heat exchange surface combined with the corrugated shape further boost the thermal efficiency of the entire regenerator.
ER 5312 Type 8 is dedicated to the top 5 to 3 courses of the checker packing. It is compatible with the use of others CRUCIFORM® types in the remaining packing area.
Flue size: 140x55mm up to 180x75mm
Shape | Weight |
---|---|
X shape: ER 5312 X8 | 15.7kg |
T shape: ER 5312 T8 P | 11kg |
T shape: ER 5312 T8 G | 13.2kg |
L shape: ER 5312 L8 L | 9.6kg |
L shape: ER 5312 L8 J | 8.7kg |
Chemical and physical properties
Microstructure

Typical chemical composition
Typical crystallographic analysis
Physical characteristics
Description | International standards | British standards |
---|---|---|
Cold crushing strength | 60MPa | 8,702psi |
Refractoriness under load of 2.105Pa | 1,750°C | 3,182°F |
Typical bulk density | 2.9g/cm3 | 181pcf |
Instructions of use
Installation instructions
CRUCIFORMS® Tutorial: How to install cruciform checkerpack

Storage
The electrofused ß"' alumina (15Al2O3, 4MgO, Na2O), ER 5312 RX solution must be stored in a dry environment protected from weather conditions.
Related products
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.
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.