Application: used to extract the high-temperature/pressure (or vacuum) melt flow or polymer from pipeline and cut it directly. When the valve is shut off,the feeding mouth of plunger matches up with the internal wall of pipeline and provides no disturbance to the meld flow inside the pipeline. 适应范围：用于高温高压（或全真空）熔体流或聚合物从管线中直接提取出来及切断，当阀门关闭时，其柱塞配料口正好与管线内表面相匹配，这样不会干扰线里熔体的流动。