Some extruders do not need, some extruder is absolutely can not be installed. Extruder with a screen changer, mainly hydraulic changer, to reduce the time for manual network, saving the production of waste, can more efficient production of products. When the extruder head pressure rises too high, so that the impact Production time, it should change the network. As a extrusion screen changer supplier, Battes policy is to be based on continuous researches and exploitations. That makes us manufactu