Ball valve seal assembly and ball valve comprising same
AssigneeFisher Controls International LLC
InventorsPaul Russell Dalluge, Lonnie Oscar Davies, Jr.
Life of this patent
Estimating the term…
Abstract
A seal assembly in a rotary ball valve is installable and replaceable through a bonnet opening in a valve body of the rotary ball valve. The seal assembly includes an anchor ring located in an internal recess in the valve body and one or more seal assembly components, such as a flexible seal member, a seal carrier, a seal retainer, and a rigid seal ring, are secured to the anchor ring.
Claims20
A method of installing a seal assembly in a rotary ball valve having a valve body including a fluid inlet and a fluid outlet, and a removable bonnet attached to a bonnet opening in the valve housing, the method comprising:
- inserting an anchor ring through the bonnet opening and into the valve body;
- positioning the anchor ring in an internal recess in the valve body;
- securing the anchor ring in the internal recess;
- inserting an additional seal assembly component through the bonnet opening and into the valve body proximate the anchor ring;
- securing the additional seal assembly component to the anchor ring by inserting one or more captive screws through respective threaded openings in the additional seal assembly component and into respective bores each having a threaded and unthreaded portion in the anchor ring;
- and
- installing the removable bonnet on the bonnet opening.
A seal assembly for a rotary ball valve, the seal assembly comprising:
- an anchor ring, the anchor ring having one or more bores with respective threaded portion and unthreaded portions;
- a seal component having a first flange, the first flange including one or more threaded openings;
- and
- one or more captive screws,
- wherein at least one captive screw secures the seal component to the anchor ring, a portion of the at least one captive screw extending through a respective threaded opening in the flange and into a respective bore.
A rotary ball valve comprising:
- a valve body having a fluid inlet and a fluid outlet and an internal recess positioned between the fluid inlet and the fluid outlet, the internal recess having a larger diameter than a diameter of the fluid inlet;
- a seal assembly comprising an anchor ring, the anchor ring having a bore with a threaded and unthreaded portion, the seal assembly being disposed within the internal recess;
- and
- a rotatable ball element disposed within the valve body, the rotatable ball element being movable between an open position, spaced apart from the seal assembly, and a closed position adjacent the seal assembly;
- wherein one element of the seal assembly includes a first flange, the first flange having a threaded opening and the one element of the seal assembly is attached to the anchor ring with a captive screw that extends through the threaded opening in the first flange and into the bore of the anchor ring.
Dependencies are inferred from the claim text.