对于滤除某些化学、生物、放射性等高污染物的安全防护系 统，为了避免更换维护人员接触过滤器，必须采取特殊设计 的过滤器更换箱体，即袋进袋出式安全更换过滤箱。

袋进袋出式安全更换过滤箱可有效地防止了放射性气体，病 原体，以及有毒化学品的污染。常用于医疗护理、生物制 药、微电子、核工业以及生化实验室。

更换过滤箱内的过滤器是通过带有手套的PVC袋来操作完成 的。在更换过滤器时，PVC袋子不仅保证箱体处于密闭状 态，而且还把更换下来的过滤器密闭封装起来。

For the safety protection system that filters out some chemical, biological, radioactive and other high pollutants, in order to avoid the replacement of maintenance personnel contact with the filter, we must adopt a specially designed filter replacement box, namely bag in bag out safe replacement filter box.

Bag in bag out safe replacement filter tank can effectively prevent the contamination of radioactive gas, pathogens, and toxic chemicals. It is commonly used in medical care, biopharmaceuticals, microelectronics, nuclear industry and biochemical laboratories.

The replacement of the filter in the filter box is done through a PVC bag with gloves. When replacing the filter, the PVC bag not only ensures that the box is in a closed state, but also seals the replaced filter.