Valve seat ring and multi-way valve having valve seat ring |
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| 申请号 | US15317769 | 申请日 | 2014-08-21 | 公开(公告)号 | US09958074B2 | 公开(公告)日 | 2018-05-01 |
| 申请人 | KELAMAYI KING-BULL INFORTEC PETROLEUM EQUIPMENT CO., LTD.; | 发明人 | Mingmin Wan; Jianshe Yao; Zhi Gao; Yunzhao Chen; Liyun Zhu; | ||||
| 摘要 | The multi-way valve comprises an upper valve body, a lower valve body and a rotary valve core. A valve seat ring is located in the rotary valve core and comprises a body. A first annular boss is arranged on an outer wall of the body, and a second annular boss is arranged on an inner wall. The upper surfaces of the first annular boss and the second annular boss are respectively flush with the upper surface of the body to form a sealing surface which fits with a sealing surface of the upper valve body in a sealed manner. An annular gap is formed between the lower surface of the first annular boss and the rotary valve core, so that liquid in the chamber and an oil incoming channel respectively acts on the lower surface of the first annular boss or the second annular boss to form a sealing load. | ||||||
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