| 摘要 |
<p>A pressure relief valve assembly has a tubular body (10) with an internally projecting first valve seat (34). An annular seal carrier (22) supports a resilient seal (24) which is spring-biased into engagement with the first valve seat (34). A movable valve member (44) has a second valve seat (46) which is spring-biased into engagement with the resilient seal (24), the range of movement of the movable valve member (44) towards the resilient seal (24) being limited by an abutment formation (52) which engages with a complementary formation (54) on the body (10). The resilient seal (24) comprises a body portion (26) abutting the seal carrier (22), a first lip portion (32) capable of flexing movement relative to the body portion (26) and adapted to engage with the first valve seat (34) and a second lip portion (48) capable of flexing movement relative to the body portion (26) and adapted to engage with the second valve seat (46). <IMAGE></p> |
