| 摘要 |
Pressurised fluid system 1 has pressure control unit 2 and an expansion relief unit 3 secured by at least one fixing or locking member 6 inserted through apertures 7 in portion 5 and forced between adjacent surfaces of portions 4 and 5 until held together. The two units 2 and 3 can be fitted together such that they cannot be readily dis-assembled subsequently. If necessary, it may still be possible to separate them, but only with difficulty, and fixing member will be irrepairably damaged, requiring a new fixing member for subsequent re-assembly. Thus unintended dis-assembly, or intended dis-assembly by an unauthorised or inexperienced person, is inhibited. The fixing member may comprise a circlip (fig 6, 34). A non-return valve unit may also be provided. |
