Saint-Gobain NorPro’s Aludur® support assemblies are ideal for use as primary support in sulfuric acid absorbers, driers, coolers, and other highly corrosive applications in large diameter towers.
Aludur® grid bar systems, developed by Saint-Gobain NorPro over 60 years ago, include the following benefits:
The superior qualities of Aludur® formulation permit the use of thinner bars and greater center-to-center spacing. At 83% open area, our grid bar systems far exceed that of typical supports and work equally well with stacked or dumped packing. When used with dumped packing, a secondary layer of grid blocks or cross partition rings on top of the primary support bars is recommended. While maximum individual bar length is limited to 84 in. (2.13 m), grid bars may be used in towers of any diameter through the use of mid-span supports. Bars are factory-cut to custom lengths to create the complete grid bar support assembly.
Grid bar support assemblies can be designed for two standard installations: 8 in. centerline bar spacing for use with Proware™ grid blocks as secondary packing support, or 6 in. centerline bar spacing for use with Proware™ cross partition rings as secondary packing support. At 83%, the open area of an Aludur® grid bar system far exceeds that of typical dome supports. This greater open area means lower pressure drop or greater hydraulic capacity.
|Acid Resistance||> 3.0 wt%|
|Water Absorption||< 0.4 wt%|
|Flexural Strength (10-in. bar)||8000 psi|
|Nominal 8-in. bars -- properties
|Nominal 10-in. bars -- properties
10.4 in. (264 mm)
1.4 in. (35 mm)
84 in. (2134 mm) max
10-in. bars on 8-in. spacing (122 kg/m2)
|For Nominal 8 in. (210 mm) Grid Bar Height Installed on 8 in. Center-to-Center Spacing||For Nominal 10 in. (264 mm) Grid Bar Height Installed on 8 in. Center-to-Center Spacing|
|Bar Length||Total load on support grid per cross-sectional area of tower @ <150°C||Total load on support grid per cross-sectional area of tower @ >150°C||Bar Length||Total load on support grid per cross-sectional area of tower @ <150°C||Total load on support grid per cross-sectional area of tower @ >150°C|
|Balance||MgO, CaO, TiO2, Na2O, Fe2O3, K2O|
Saint-Gobain NorPro’s Grid Blocks and Cross Partition Rings are made with our Proware™ ceramic formulation ensuring superior performance with Aludur® support assemblies.
Proware™ Grid Blocks should be used for secondary support with bars placed on 8 in. centers. Grid bars with NorPro® grid blocks also have 15% more free space than a conventional 6" center installation using cross partition rings. The square stacking pattern of Proware™ grid blocks layered above Aludur® grid bars provides 72% open area.
Proware™ Cross Partition Rings should be used as secondary support with bars placed on 6 in. centers. An additional layer of 4 in. rings is required to ensure retention of 2 in. saddles above.