A pulp screen cylinder that includes screen media releasably engaged with a frame at spaced locations opposing movement of the media away from the frame during screening. A preferred frame includes a plurality of spaced engaging structures that releasably engage screen media. A preferred frame includes an arrangement of flow windows that are triangular or rhomboid. A preferred method includes producing a frame cylinder by centrifugal casting and machining flow windows using a jet cutting process. A preferred screen media has a plurality of spaced apart engaging structures that each releasably engages the frame at spaced apart locations. A preferred screen media is of wedgewire construction having engaging structure carried by a plurality of spaced wire retaining clips. A preferred clip has vee-shaped rounded slots and an arm thicker than an end wall. A preferred engaging structure includes a projection that has a lip or hook for releasable interlocking engagement.
