US 6,585,003 B2 · Rising stem soft seat plug valve

Abstract

A rising stem plug valve has a valve body housing that receives a plug. A handle assembly is attached to the plug for rotational movement of the plug between operative positions. A control assembly is attached to the plug for unseating and seating of the plug within the valve body. The plug includes at least one plug portion having openings corresponding to an interior configuration. Ring cords substantially surround the openings in the plug to create a seal therearound. The plug may include upper and lower plug portions with an untapered portion located between them. An O-ring is located on the untapered portion of the plug to maintain separation between the upper and lower plug portions.

Claims14

Dependent claims

A valve assembly comprising:

a valve housing;
a plug received in the valve housing, the plug having at least one plug portion with a plurality of openings corresponding to the interior configuration of the plug portion;
a plurality of ring cords on the plug, each of the ring cords substantially surrounding one of the plurality of openings, wherein each ring cord is a substantially rectangular ring cord having a sealing surface extending substantially the entire width of the ring cord and a surface opposite the sealing surface being immediately adjacent the plug for substantially the entire width of the ring cord, wherein the plug has an upper and lower plug portion and an untapered portion between said upper and lower plug portion;
an O-ring located in the untapered portion of the plug;
and
a control assembly coupled to the plug for axial movement thereof.

3 more elements

Dependencies are inferred from the claim text.

Rising stem soft seat plug valve

Life of this patent

Rising stem soft seat plug valve

Life of this patent

Abstract

Claims14