Systems and methods for rising stem ball valves
AssigneeSCV Valve, LLC
InventorSidney McCarra
Life of this patent
Estimating the term…
Abstract
A ball valve system includes a body having an upstream end and a downstream end and a ball within the body between the upstream end and the downstream end, the ball being rotatable about a vertical axis to move between a closed position and an open position. The ball valve assembly includes a stem movable in an actuation direction substantially parallel to the vertical axis, the stem including a recess at a proximal portion of the stem, a guiding member extending within the recess of the stem, the guiding member being configured to prevent rotation of the stem or cause rotation of the stem, and a lubrication port in fluid communication with the recess.
Claims6
A method of assembling a ball valve system, the method comprising:
- securing a ball within a body, the body including an upstream end and a downstream end;
- inserting a vertically-translateable stem within the ball, the stem including a linearly-extending proximal recess configured to prevent rotation of the stem and a distal recess that includes a twist forming a pair of diametrically-opposed guide surfaces which each extend about 90 degrees along a circumference of the stem, the stem being configured to translate vertically, without rotating, to actuate the ball;
- forming a lubrication channel in the ball valve system, the lubrication channel being positioned to supply lubricant to the proximal recess;
- and
- inserting a removable valve seat ring within a valve seat retainer, the removable valve seat ring being configured to receive and contact a portion of the ball with a seat insert.
Dependencies are inferred from the claim text.