Two independently driven 44:1 L/D, 700 hp, 640 rpm, 92mm W-P twin-screw extruders (see diagram) for a total processing length of 88:1 L/D w/ 1,400 total hp. Feeds: capable of up to 12 with each controlled by common loss-in-weight or mass flow control system. Feeds include solids from 1 to 4,000 pounds per hour of pellets or baled rubber plus liquids (initiators, oils, reactants, and stripping agents) from 0.10 gph to 300 gph; feed accuracy to 0.1% of feed rate. Ancillary equipment: Three side feeders; two injection ports on all barrels; four independent vacuum systems to 28 in Hg; Kreyenborg KSW dual piston screen changer; gear pump; pelletizing with Gala underwater, strand or water ring; cooling capacity on contact water to 40F at 3,000 pphr of product @ 400F. Data logging on all control variables. Line Five-Six also has additional downstream drying and blending capabilities.