Maplan
Homogenizer Screws
Variable Clearance barrier screws
Farrel Corp
Westland Corp
Energy Transfer Screw
Spiral R Screw
Spirex Pulsar Line
T Melt screw
Barrier Screw

                                        

Barrier Screw

Barrier Screw

Cincinnati Milacron's Melstar combines barrier screw and low shear mixing head.
..............................................................................................................................................................................