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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. 適應范圍：用于高溫高壓（或全真空）熔體流或聚合物從管線中直接提取出來及切斷，當閥門關閉時，其柱塞配料口正好與管線內表面相匹配，這樣不會干擾線里熔體的流動。