| 摘要 |
A device for controlling the release of gas from a pressurised container comprises a plug 10 with a passage therethrough and a diaphragm 40 within said passage. The diaphragm is configured to initially prevent flow of gas through said passage. A screw 20 located within said plug and comprising a lance 30 is configured to move towards said diaphragm upon rotation of said screw and rupture or displace said diaphragm so as to allow flow of gas through said passage and out of said plug, once said screw is rotated a predetermined amount. The lance may have a square cross section. |
