| 摘要 |
A pressure-activated flexible valve (10) for use with a container for dispensing fluid material. The valve (10) has a single sealing surface and comprises an inner component (12) having a sealing portion (22) and an outer component (14) having an annular rim (44) that seats against the sealing portion (22). The outer component (14) also has a flexible portion (40) that changes shape in response to pressure from the container material, thereby opening and closing the valve (10).
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