초록 ▼

A butterfly valve having a valve body is provided. The butterfly valve includes a valve disk assembly rotationally coupled to the valve body. The valve disk assembly has a disk member with a first surface disposed about a periphery having a first diameter and a second surface offset from the first s

A butterfly valve having a valve body is provided. The butterfly valve includes a valve disk assembly rotationally coupled to the valve body. The valve disk assembly has a disk member with a first surface disposed about a periphery having a first diameter and a second surface offset from the first surface. A seal ring is arranged adjacent the first surface, the seal ring having a first outer surface with a second diameter, wherein the second diameter is larger than the first diameter. A retainer is coupled to the second surface adjacent the seal ring opposite the first surface. The retainer has inner surface arranged to radially constraining the seal ring on the disk member.

대표청구항 ▼

1. A butterfly valve disk assembly comprising: a disk member having a first surface disposed about a periphery having a first diameter, the disk member having a second surface offset from the first surface, the disk member having an inlet side and an outlet side, the second surface being on the inle

1. A butterfly valve disk assembly comprising: a disk member having a first surface disposed about a periphery having a first diameter, the disk member having a second surface offset from the first surface, the disk member having an inlet side and an outlet side, the second surface being on the inlet side;a seal ring arranged adjacent the first surface, the seal ring having a first outer surface with a second diameter, wherein the second diameter is larger than the first diameter; and,a retainer coupled to the second surface adjacent the seal ring opposite the first surface, the retainer having an inner surface, wherein the inner surface is arranged to radially constrain the seal ring on the disk member;wherein the disk member includes a groove disposed adjacent the first surface and at least a portion of the seal ring is disposed within the groove;wherein the retainer is at least partially disposed within the groove;wherein the disk member includes a third surface offset from the second surface distal from the first surface; andwherein the retainer includes a first projection distal from the second surface, the first projection engaging the third surface. 2. The butterfly valve disk assembly of claim 1 further comprising a radial gap between the retainer and the seal ring, wherein the seal ring is free to rotate on the disk member. 3. A butterfly valve comprising a valve body having a bore;a valve disk assembly rotationally coupled to the valve body, the valve disk assembly rotatable between a closed position in contact with the bore and an open position, the valve disk assembly having a disk member with an inlet side and an outlet side, the inlet side having a first surface disposed about a periphery and a second surface offset from the first surface, wherein the second surface is opposite the outlet side;a semi-circular seal ring arranged adjacent the first surface; and,a retainer coupled to the second surface, the retainer arranged to retain the seal ring in a radial and axial direction; andwherein the disk member includes:a third surface adjacent the second surface opposite the first surface; and,a semi-circumferential groove disposed about an inner diameter of the first surface, the semi-circumferential groove having a first end adjacent a side of the second surface and a second end adjacent an opposite side of the second surface. 4. The butterfly valve of claim 3 wherein the seal ring includes a first portion substantially parallel to the first surface and a substantially perpendicular second portion disposed along an inner diameter of the seal ring, wherein the second portion is at least partially disposed in the semi-circumferential groove. 5. The butterfly valve of claim 4 wherein the retainer includes a third portion coupled to the second surface and a semi-circular fourth portion extending from the third portion, the semi-circular fourth portion being at least partially disposed within the semi-circumferential groove. 6. The butterfly valve of claim 5 wherein the disk member includes a first hole extending between the inlet side and the outlet side at the second surface and the third portion includes a second hole arranged coaxial with the first hole. 7. The butterfly valve of claim 6 further comprising a fastener disposed within the first hole and the second hole. 8. The butterfly valve of claim 5 wherein the retainer includes a fifth portion distal from the second portion and engaging the third surface. 9. A butterfly valve comprising: a valve body;a valve disk assembly rotationally coupled to the valve body, the valve disk assembly comprising a disk member having a side with a first surface, a second surface offset from the first surface and a third surface offset from the second surface and distal from the first surface, the disk member having a groove disposed between the first surface and the third surface;a seal ring arranged adjacent the third surface and at least partially within the groove, the seal ring having an outer diameter larger than a disk outer diameter; and,a retainer having an L-shaped portion adjacent the seal ring, the retainer having a first portion and a second portion spaced apart by a gap, the first portion being disposed adjacent a first end of the L-shaped portion and the second portion adjacent a second end of the L-shaped portion, the first portion and the second portion being coupled to the second surface. 10. The butterfly valve of claim 9 wherein the retainer includes a fourth surface extending about an inner diameter, the fourth surface radially constraining the seal ring. 11. The butterfly valve of claim 10 wherein the L-shaped portion is at least partially disposed within the groove. 12. The butterfly valve of claim 11 wherein the disk member further includes a planar fifth surface between the first surface and the second surface. 13. The butterfly valve of claim 12 wherein the first portion includes a planar surface adjacent the planar fifth surface and the second portion includes a planar surface adjacent the planar fifth surface. 14. The butterfly valve of claim 10 further comprising a first projection extending from the L-shaped portion and disposed between the first portion and the second portion, the first projection engaging the first surface. 15. The butterfly valve of claim 14 further comprising a second projection extending from the L-shaped portion and disposed between the first projection and the second portion, the second projection engaging the first surface.