... years of experiences 5.One year warranty Description:Double screw extruder mainly contains :feeding systems, extruding systems, cutting systems, heating ... infrared heating manner,circulate water for cooling,to guarantee the extruder running safely.D: Gearing system:the main motor,feeding ... speed ,the frequency we use is : DELTA,the gear we use hard gear,enough strong,running placidiy and low noise.E: ...