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US 9,115,812 B2Granted
Plug valve with a spring biased plug
AssigneeJohnson Electric S.A.
InventorsMajid Bakhshi, Joerg Gassmann, Wolfram Schwarze
Life of this patent
Estimating the term…
Abstract
In a plug valve with a plug supported around its axis of rotation in a flow passageway of the valve housing, the plug is supported in a floating manner against a spring force pressing the plug against an annular sealing element. The spring force is provided by a spring element bearing against the valve housing and engaging with a trunnion of the plug. The sealing element is supported in a fixed position against a flow passage opening.
Claims18
A plug valve comprising:
- a valve housing having a flow passageway for the flow of a medium;
- a plug supported in a floating manner for rotation about an axis in the flow passageway;
- an annular rubbery-elastic lip sealing element supported in a fixed position against an opening of the flow passageway, and comprising a main body and a contact lip extending radially and inwardly from a central portion of the main body, the contact lip having a free end bending towards and contacting the plug, wherein the free end of the contact lip of the annular rubbery-elastic lip sealing element bends towards the rotation axis of the plug;
- and
- at least one spring element bearing against the valve housing and pressing the plug against the contact lip the annular rubbery-elastic lip sealing element.
2 more elements
A plug valve comprising:
- a valve housing having a flow passageway for the flow of a medium;
- a plug having a pair of trunnions defining an axis of rotation, the plug being supported in a floating manner for rotation about the axis in the flow passageway;
- an annular rubbery-elastic lip sealing element supported in a fixed position against an opening of the flow passageway, wherein the annular rubbery-elastic sealing element has a cross section substantially J-shaped and comprises a main body and a contact lip extending radially and inwardly from the main body and having a bent free end contacting the plug, wherein the free end of the contact lip of the annular rubbery-elastic lip sealing element bends towards the rotation axis of the plug;
- and
- at least one spring element bearing against the valve housing and engaging with at least one of the trunnions of the plug, the at least one spring element pressing the plug against the contact lip of the annular rubbery-elastic lip sealing element.
2 more elements
A plug valve comprising:
- a valve housing having a flow passageway for the flow of a medium, and defining a pair of first grooves and a pair of second grooves, each second groove recessed from a bottom of a respective first groove;
- a plug having a ball shaped body and a pair of trunnions integrally protruding from two opposite sides of the ball shaped body, the trunnions defining an axis of rotation and being supported in the first grooves in a floating manner for rotation about the axis in the flow passageway;
- an annular sealing element supported in a fixed position against an opening of the flow passageway;
- and
- a pair of spring elements bearing against the valve housing and pressing the trunnions of the plug, the trunnions being rotatable relative to the spring elements, each spring being arranged in such a manner that the most portion thereof is received in a respective second groove and the remaining portion thereof extending beyond the second groove and protruding into the first groove.
2 more elements
Dependencies are inferred from the claim text.