发明名称 |
Method for isolating a relief valve |
摘要 |
A method for isolating a relief valve, the relief valve being positioned in fluid communication with a pressurized vessel by positioning a gate valve body between and in fluid communication with the relief valve and the pressurized vessel, the gate valve body including a plug and a cap positioned to sealingly close an opening in the gate valve body generally covered by a gate valve bonnet cover and yoke, removing the cap, sealingly positioning a sandwich valve over the opening in the gate valve so that when the pass-through is opened a passageway through the pass-through sandwich valve is generally co-axial with the opening in the gate valve, sealingly positioning a removable yoke over the passageway through the pass-through, the removable yoke including a stem and being adapted to movement of the stem through the removable yoke; opening the pass-through; moving the stem into engagement with the plug and removing the plug from the opening in the gate valve body; and positioning a valve gate on the stem and moving the valve gate into closing engagement with valve seats positioned in the gate valve body to isolate the relief valve.
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申请公布号 |
US5381815(A) |
申请公布日期 |
1995.01.17 |
申请号 |
US19930048089 |
申请日期 |
1993.04.15 |
申请人 |
ATLANTIC RICHFIELD COMPANY;KOPPL COMPANY INCORPORATED |
发明人 |
OKONEK, LESLIE J.;WEGNER, JOHN W. |
分类号 |
F16K43/00;(IPC1-7):F16K43/00 |
主分类号 |
F16K43/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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