| 摘要 |
A dual seal assembly for providing a seal between a reciprocating rod (28) and the gland (20) is described. The dual seal includes first (12) and second (14) axially adjacent annular seal elements. The first seal element is constructed of a material having a different hardness than the material forming the second seal element. The first and second seal elements each include a seal edge (62, 97) contacting the rod to provide a respective seal between the fist and second seal element and the rod. At least a portion (39, 79) of one of the first seal element (12, 14) and the second seal element engages the gland to form the seal between the rod and the gland. By varying the hardness of the materials forming the seal elements, the first seal element and the second seal element can be configured to provide different functions within the dual seal assembly and can cooperatively provide an effective fluid seal under a wide range of operating conditions. In an alternative embodiment, the components of the dual seal assembly are split to facilitate installation, replacement, monitoring, or inspection of the dual seal assembly. The seal elements of the seal are split at an interface (100) to form first (108) and second (108) interconnecting edges that interlock to inhibit separation of the seal elements at the interface.
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