Nozzle for screen apparatus

A pressure fed sieve screen apparatus comprising:

• a housing having a longitudinal dimension;
• a screen having longitudinal and width dimensions mounted within the housing to define a solids zone and an effluent zone on respective solids and effluent sides of the screen;
• at least two nozzle blocks mounted within the housing along the width dimension of the screen, each block having an inlet aperture for admitting slurry into the nozzle and outlet means fluidly connected to the inlet aperture, the outlet means extending in the width direction of the screen a distance no greater than one half the width dimension of the screen, for distributing the slurry onto the solids side of the screen in a fan-shaped flow pattern that spreads out along and substantially spans the width dimension of the screen;
• and
• means for supplying slurry under pressure to each nozzle inlet aperture, whereby each nozzle can be operated alone in alternation to discharge slurry over the full width of the screen.