| 摘要 |
<p>A check valve comprises a valve member 10 movable within a passage 12 provided in a housing 14. Biasing means 22 biases the valve member 10 into engagement with a seating surface 28. An environmental seal member 30 is secured to the valve member 10 by a retainer member 36 and is engageable with the seating surface 28. The retainer member 36 includes a lip (48, Fig. 5) elastically deflectable by the environmental seal member 30 into sealing engagement with the seating surface 28. Extrusion of the environmental seal member 30 between the retainer member 36 and the seating surface 28 is reduced and the sealing of the valve is enhanced.</p> |
