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Johnson Screens Shaped Support Grid

Johnson Screens' Shaped Support Grid (SSG) is designed to be installed into the bottom head of hydroprocessing or gas dehydration vessels, allowing for better liquid and gas flow, bed utilization, distribution and an overall more efficient process.


The Johnson Screens' Shaped Support Grid (SSG) design performs better than traditional flat surface grid assemblies that are located near the tangent line of the head to shell weld. With traditional flat surface grids designs, the entire volume of the head is a dead area, with no reaction or drying adsorption occurring. 

The Support Grid lies directly on the bottom head surface, allowing for the entire volume to be filled with media. Increased bed volume allows for the conversion of existing vessels to achieve higher process capacity and new vessels to be built shorter in shell length.

During the down flow operation, the tapered design of SSG collects flow from the entire cross section of the vessel and moves it toward the center hub outlet, producing a uniform flow across the entire vessel and better bed utilization up to 30% over traditional bed support systems. 

Away from the vessel centerline, the volumes of catalyst or sieve are much greater. 

The SSG panel matches the configuration shape of the vessel head, collecting flow from all areas uniformly without having to cover the entire cross section of the vessel.

Locations and Contact


Aqseptence Group Japan Limited, Susono

Manufacturing Location
A138 Kanezawa, Susono
410-1106 Shizuoka

Tel: +81 55 997 8511

Fax: +81 55 997 8514



Aqseptence Group (India) Private Limited, Ahmedabad

Sales and Manufacturing Location
E-540, GIDC, Sanand-II Industrial Estate,
Village: Bol, Tak: Sanand,
Gujarat 382170, Ahmedabad

Tel: +91 2717 618000



Aqseptence Group SAS, Availles-en-Chatellerault

Sales and Manufacturing Location
Zone Industrielle
86530 Availles-en-Châtellerault

Tel: +33 5 4902 1600

Fax: +33 5 4902 1616



Aqseptence Group SAS, Soissons

Sales and Manufacturing Location
108 route de Reims
02200 Billy-sur-Aisne

Tel: +33 3 23 75 05 42

Fax: +33 3 23 75 05 43


North America

Aqseptence Group, Inc., New Brighton, MN

Sales and Manufacturing Location
1950 Old Hwy 8 NW,
New Brighton, MN 55112

Tel: +1 651 636 3900

Fax: +1 651 638 3171


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