摘要 |
An improved seat ring, valve body, and seat ring valve assembly have self-aligning characteristics that reduce leakage without the need for an unacceptably high level of assembly torque. The seat ring includes at least one annular thrust bearing surface rim for receiving a valve plug to open and close the valve. The seat ring further includes threads positioned on its exterior surface for mating with threads in the valve body to provide a secondary seal of the seat ring. In order to prevent unacceptable leakage, a point of contact is provided to seat on an angled body contact surface of the valve to form a superior primary contact seal. The seat ring valve assembly reduces torque requirements, properly aligns the seat ring within the cavity, and reduces leakage.
|