发明名称 |
SELF ALIGNING SPHERICAL BACKSEAT ASSEMBLY FOR A VALVE |
摘要 |
<p>A gate valve assembly having a body, a gate, a stem, and a backseat for sealing between the stem and the body. The backseat is an annular member with a complementary surface on its inside that fits over a spherically shaped section of the stem; thus allowing the backseat to rotate and pivot with respect to the stem. An outer surface of the backseat is beveled for sealingly engaging a stem passage formed through the body. A flex member is provided that is for sealing a surface adjacent the backseat. The flex member can form a seal between the backseat member and the stem or between an annular retainer and the backseat.Figure 1</p> |
申请公布号 |
SG193719(A1) |
申请公布日期 |
2013.10.30 |
申请号 |
SG20130016407 |
申请日期 |
2013.03.05 |
申请人 |
VETCO GRAY INC |
发明人 |
PRACHAKVEJ, THEERAPONG;COMEAUX, DAVID DANIEL;HOANG, CHAU |
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