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Introduction :
Johnson all metallic header lateral eliminates
the problem of breakage faced in plastic and abonite laterals and nozzles. This saves
considerable cost by reducing the down time of process to identify the cracks
etc.
" Versatile" is the best
single-word description of a Johnson screen lateral system. These assemblies, which consist of a series of screen laterals attached to
either a central header or hub, allow designers to provide uniform flow through treatment
media at a wide range of rates and for
a variety of vessel sizes and
shapes.
A typical vessel would use a header lateral
assembly at the top to distribute inflow evenly across the bed surface.
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A second assembly, located near the
vessel bottom, could collect the treated flow and
pass it either through the vessel
sidewall or -
by attaching the laterals to a central hub - out the vessel bottom.
For counter-current flow, a similar distribution and collection system can be designed.
Several available design options can be
chosen to achieve uniform, controlled rate flow and collection. The number and spacing of laterals, for
example, can be varied. Slot sizes can be any width from 0.05 mm up in 0.03 mm
increments. Diameters of laterals and headers can also vary. To deal with particular process
chemistry or conditions, the screen assemblies can be made from nearly any
wieldable metal including several grades of stainless steel and exotic alloys.
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