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        1. Home
        2. Mass Transfer Products
        3. Aludur Support Assemblies

        MASS TRANSFER

        Mass Transfer Products Menu  

        Aludur Support Assemblies

        Secondary Support Media

        Proware Saddles & Raschig Rings

        Aludur® Support Assemblies

        Aludur Support Assemblies, Grid Blocks & Bars | Saint-Gobain NorProSaint-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:

        • excellent thermal stability
        • lower pressure drop or greater hydraulic capacity
        • exceptional mechanical strength
        • resist all alkalis, solvents, and acids (except hydrofluoric acid)
        • maintains its excellent chemical resistance at temperatures well beyond the limits of standard ceramic (it should not be used in systems where the bars will be exposed to superheated steam for an extended period of time)  

        Aludur Support Assemblies (Drawing) | Saint-Gobain NorProThe 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. (2.13m), 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.
         

         


        • Aludur Properties & Composition
        • Proware Secondary Support

        Aludur® Typical Physical Properties

         

        Acid Resistance < 3.0 wt%
        Water Absorption < 0.4 wt%
        Flexural Strength (10-in. bar) 8000 psi
        Nominal 8-in. bars -- properties
        • Height
        • Width
        • Length
        • Weight
        • Allowable loads (see table below)


        8.3 in. (210mm)
        1.4 in. (35mm)
        84 in. (2134mm) max
        8-in. bars on 8-in. spacing (98 kg/m2)

        Nominal 10-in. bars -- properties
        • Height
        • Width
        • Length
        • Weight
        • Allowable loads (see table below)

        10.4 in. (264mm)
        1.4 in. (35mm)
        84 in. (2134mm) max

        10-in. bars on 8-in. spacing (122 kg/m2)

         

        Allowable Loads

         

        Allowable Loads

        For Nominal 8 in. (210mm) Grid Bar Height Installed on 8 in. Center-to-Center Spacing For Nominal 10 in. (264mm) 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
        in. mm lb/ft2 kg/m2 lb/ft2 kg/m2 in. mm lb/ft2 kg/m2 lb/ft2 kg/m2
        30 762 1500 7324 1000 4882 30 762 1500 7324 1000 4882
        36 914 1500 7324 1000 4882 36 914 1500 7324 1000 4882
        42 1067 1500 7324 1000 4882 42 1067 1500 7324 1000 4882
        48 1219 1310 6396 875 4272 48 1219 1500 7324 1000 4882
        54 1372 1035 5053 690 3369 54 1372 1500 7324 1000 4882
        50 1524 838 4091 560 2734 50 1524 1297 6338 865 4223
        66 1676 693 3384 460 2246 66 1676 1072 5234 715 3491
        72 1829 582 2842 390 1904 72 1829 900 4394 600 2929
        78 1981 496 2422 330 1611 78 1981 767 3745 510 2490
        84 2134 428 2090 285 1391 84 2134 662 3232 440 2148

         

        Aludur® Typical Chemical Composition

        Al2O3 76%
        SiO2 20%
        Balance MgO, CaO, TiO2, Na2O, Fe2O3, K2O

         

        Proware™ Secondary Support

        Proware Cross Partition Rings | Saint-Gobain NorProProware Grid Blocks | Saint-Gobain NorProSaint-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 in. center installation using cross partition rings.  The square stacking pattern of Proware™ grid blocks layered above Aludur® grid bars provides 72% open area.  Proware grid blocks will retain 50mm (2 in.) saddles.

        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.  Proware cross partition rings are manufactured in 3 in. (80mm), 4 in. (100mm) and 6 in. (150mm) diameters.

        Grid Block Typical Physical Properties

        Block Dimensions 8.5 in. L x 5.75 in. W x 3.5 in. H
        (216mm L x 146mm W x 89mm H) 
        Weight per Tower Area 94 kg/m2
        Acid Resistance < 4.0 wt%
        Water Absorption

        < 0.4 wt%

        Leachable Iron < 0.01 wt%

        Each block typically weights 6.1 lbs. (2.77kg) and when installed occupies an area of approximately 46 in.2 (297cm2).  Generally, 5-8% spares are recommended to allow for cutting at the tower wall.

        Related Resources

         Aludur® Support Assemblies (Data Sheet)
         Proware™ Ceramic Mass Transfer Media (Data Sheet)
        Saint-Gobain NorPro is a business of Saint-Gobain Ceramic Materials

         

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