Patent ID: 11898656
Assignee: DRESSER, LLC
Field: Mechanical elements (Mechanical engineering)
Classification: CPC F | IPC F

Claim 7:
8. A high-pressure valve comprising:
a valve bonnet defining a packing box having an inner surface Roughness Average (Ra) between 0.10 and 0.15;
a plurality of Polytetrafluoroethylene (PTFE) packing rings in a packing stack;
a packer bolted to the bonnet and extending into the packing box, the packer configured to apply a pressure on the packing;
a valve body;
a valve stem extending though the valve bonnet and into the valve body, the valve stem defining an outer surface having an Ra of 0.15 or less; and
a metal gasket between the valve bonnet and the valve body,
wherein the valve is configured to retain pressures of at least 10,000 pounds per square inch.