초록 ▼

A valve includes a column having an outer end portion defining a threaded bore, an outer mediate portion defining a first receiving recess communicating with the threaded bore, an inner mediate portion defining a passage communicating with the first receiving recess, and an inner end portion extendi

A valve includes a column having an outer end portion defining a threaded bore, an outer mediate portion defining a first receiving recess communicating with the threaded bore, an inner mediate portion defining a passage communicating with the first receiving recess, and an inner end portion extending outwardly from a valve body and defining a second receiving recess communicating with the passage, and a valve stem having a first end portion formed with an outer thread, and a second end portion extending through the passage and formed with an annular flange received in the second receiving recess. A sealing device includes a primary set packing received in the first receiving recess, a secondary seal received in the second receiving recess and urged on the annular flange, a gland nut formed with an outer thread fixedly engaged in the threaded bore, a first biasing member mounted between the primary set packing and the gland nut, a lock nut fixedly mounted on the outer thread of the valve stem, and a second biasing member mounted between the gland nut and the lock nut.

대표청구항 ▼

[ What is claimed is:] [1.] A sealing device in combination with a valve (20) which.comprises a valve body (200), a column (21) extending outwardly from said valve body (200) and including an outer end portion defining a threaded bore (24), an outer mediate portion defining a first receiving recess

[ What is claimed is:] [1.] A sealing device in combination with a valve (20) which.comprises a valve body (200), a column (21) extending outwardly from said valve body (200) and including an outer end portion defining a threaded bore (24), an outer mediate portion defining a first receiving recess (25) communicating with said threaded bore (24), an inner mediate portion defining a passage (210) communicating with said first receiving recess (25), and an inner end portion extending outwardly from said valve body (200) and defining a second receiving recess (26) communicating with said passage (210), and a valve stem (28) rotatably mounted in said column (21) and including a first end portion extending outward of said outer end portion of said column (21) and formed with an outer thread (282), and a second end portion extending through said passage (210) and formed with an annular flange (280) received in said second receiving recess (26), and said sealing device further comprising:a primary set packing (11) mounted around said valve stem (28) and received in said first receiving recess (25);a secondary seal (19) mounted around said valve stem (28), received in said second receiving recess (26), and urged on said annular flange (280);a gland nut (14) mounted around said valve stem (28) and formed with an outer thread (141) fixedly engaged in said threaded bore (24);a first biasing member mounted between said primary set packing (11) and said gland nut (14);a lock nut (18) fixedly mounted on said outer thread (282) of said valve stem (28) and located adjacent to said gland nut (14); anda second biasing member mounted between said gland nut (14) and said lock nut (18).