| 摘要 |
A frangible diaphragm comprising ceramic discs 12, 14 for use in a valve mechanism has an actuator substance 100 such as wax provided in or on the frangible diaphragm. The actuator substance 100 expands from a smaller volume to a larger volume on application of heat, such that a force generated by the expansion causes the diaphragm to fracture. |
