Bypass valves

Bypass valves or pressure relief valves are metallic sealing valve systems specially designed for the diversion of a polymer melt flow. These valves come as a separate unit and can be installed on the main extruder side as well as on the co-extruder side of the crosshead. In case of maintenance works, conductor breaks or simply a tool change the melt flow can be easily diverted in order to facilitate the handling of the crosshead and to avoid a stop of the extruder. A wide range of working diameters and casing sizes are manufactured according to your need. The UNITEK bypass systems are available with manual, hydraulic or pneumatic actuation. In case of a hydraulic or pneumatic system, it is possible to fully integrate it into a new or existing line control - ideal for the retrofit of your extrusion line.