Filter and refiner are optional equipment for membrane production.
Filter is installed before the pump, it can prevent insoluble things in the raw material(for example: hard rocks)from harming the pump gear.
Refiner is installed before the coating tanks.It makes the bitumen compound finer and smoother by grinding and pushing the compound into 1mm diameter holes, bitumen compound which cannot go through the 1mm diameter holes will be discharged by the screw at the bottom.
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