Bypass piping

The bypass means the piping around the cutting chamber. The process water entry into the cutting chamber can be exactly timed by this bypass piping and the two 2/2 way valves, the 3/2 way valve (all valves incl. final position indicator) and the related SPS programming.

This avoids a freeze-off (blocking) of the die plate holes if the process water enters too early and, furthermore, agglomeration of the pellets if the process water enters the cutting chamber too late. Also a high loss of process water is avoided when the pelletizer is uncoupled.

All electrical equipment is pre-wired on a bigger terminal box where the plugs for the polymer diverter valve, the die plate heating and the pelletizer are connected for easy and quick electrical and mechanical disassembling of these units, e. g. if extraction of the extruder screws is necessary.