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Lockdown Screw packing seal is usually made of an HBNR compression packing element with molded metal end caps. But JST has developed a lockdown screw packing seal which is made of one filled PTFE and two cooper end caps. It is the sealing between wellhead members in a wellhead, including a seal element and a lockdown member. The seal is attachable to either one of the wellhead members by coup...
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