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Pre Pack Screen

Pre-Pack screens are manufactured with a wire designed to yield a minimum collapse pressure of 1000 PSI at a design slot opening of 0.75 mm.
The wire shape shall cause the slot opening to widen inwardly to minimize clogging. The minimum screen tensile strength exceeds 2 times the total Hang Weight of screen and blank casing below the top
screen joint. The tensile strength of these screens is around 67500 lb for 8 x 10 inches screens. The inner screen provides 20 % of inlet area of screen at the design slot size of 0.75 mm. The outer screen shall be of the same slot as the inner screen. The slot size and filter pack are to be selected on the basis of a Sieve analysis of the water bearing information.

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