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Paired Overall Foil Shields is constructed by bare copper conductors, SR PVC insulation, pairs cabled, 100% aluminum/polyester foil shield, tinned copper drain, flame retardant grey PVC Jacket and footage sequentially printed on cable. It is used in audio systems, communication circuits, instrumentation, control, industrial equipment and suitable for low capacitance applications.
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Pall rings are made from thin metal with portions of the wall bent inward or from plastic with slots in the wall and stiffening ribs inside. Beds of pall rings have 90 percent void fraction and lower pressure drop than most other packings of the same nominal size. The shape is essentially a modification of the Raschig ring. It is made of polypropylene and thermoplastics in sizes ranging from 5/8 to 3-1/2 inch. nominal diameter. A 1-in Pall ring achieves higher gas absorption for the same depth of packaging. Plastic pall rings are used extensively in both new and retrofit installations.
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Palladium catalyst is the most used among precious metal catalysts for diversified purposes. The palladium catalyst is widely used for synthesis of specialty chemicals because many reactions can take place by the catalyst at a lower temperature and pressure with a minimal quantity and minimal side reaction, especially in the hydrogenation of olefins and aromatic nitro compounds, as compared with sponge Ni metal (Raney type Ni) catalyst. It is also used for a dehalogenation and a carbonylation.
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