6.1.8.4 Terminal Filtration 终端过滤器 This level of filtration uses HEPA filters typically at the supply air terminal, and associated with cleanrooms classified as cleaner than ISO 8. A terminal filter may also be used on return/exhaust air when process room air is contaminated with environmentally sensitive particulates (hazardous airborne materials). These filters should have a silicone gel seal on the downstream side of the filter to form a positive seal to eliminate air bypass around the filter perimeter. Permanent upstream and downstream media protective screens (media guards) should be included to prevent physical damage to the media. Individual HEPA filters in filter banks should be able to be replaced without disruption of adjacent filters. H14 (99.995% @MPPS) efficient filter is recommended. 此过滤等级常常使用高效过滤器，位于供风终端，房间洁净等级高于ISO 8。当工艺房间的空气含环境敏感颗粒（有害空气物质）时，可能在回风/抽风处使用终端过滤器。此类过滤器应在过滤器下端面配有硅胶密封条以形成完全密封，消除过滤器四周的空气旁路。应该安装上下游过滤介质保护屏以防止介质的有形损坏。单个高效过滤器应能在不影响临近过滤器的条件下别更换。推荐使用H14(99.995% @MPPS)过滤器。 Terminal Air Filter Modules are constructed as either a single or multiple HEPA filter housing structure. They are positioned at the entry (ceiling) of the room and provide clean air into the space. 终端空气过滤模板是由单个或多个高效过滤器组构成。过滤器置于室内进口（天花板），向室内提供洁净空气。 A terminal module is usually intended to house a single filter. The module should be complete with insulated housing (if ambient conditions surrounding the module would result in condensation), filter, test ports, grille, trim, and hardware. The body of the module is solidly constructed of cleanable rigi...
