Radial flow systems are widely applied in catalytic reforming processes for high flow capacity and low pressure drop. The basic system consists of two concentric screens, with catalyst filled in the annular gap between them.

Process efficiency is directly determined by internal screen design performance. Manufactured with Vee-Wire profiles and support rods, Johnson Screens Center pipes feature outstanding rigidity and excellent resistance against collapse, deformation and fracture. Meanwhile, anti-clogging slot design and high open area ratio ensure reliable catalyst retention, high throughput and prolonged service life.

After precision fabrication, Vee-Wires of both Center pipe and outer basket screens run parallel to the reactor axis, with smooth sides facing the catalyst. This structure allows vertical sliding of catalyst particles without abrasion from slot edges.

Screens are commonly made of 304, 316, 321 or 347 stainless steel, with alternative metallic materials available on request.

Custom heights and diameters of outer baskets and Center pipes are offered to meet diverse operational demands.

Minimum slot opening: 0.01 inch / 0.25 mm, adjustable in increments of 0.0004 inch / 0.001 mm.

Covers, access manholes and other optional accessories are available as required.

Split-type screen structure enables installation through manholes.

Refer to our brochure or contact us for more information on Center pipes and outer screen baskets.