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90年代初期发展起来的全精馏提氮技术以其明显的社会经济效益和环保安全优势深得广大用户的大力推崇，大有‘唯全精馏提氛工艺和非填料上塔不要”的气势。而一台性能可靠的液氮循环泵正好是这一流程的动力心脏。有的泵能长期运行平稳，也有的泵时常泄漏。用户耗费了大量的维护?
The fully rectified nitrogen extraction technology developed in the early 1990’s won the great favor of the majority of users for its obvious social and economic benefits and environmental safety advantages. And a reliable liquid nitrogen circulation pump just happens to be the heart of the process, some pumps can run smoothly for a long time, and some pumps often leak.