초록 ▼

A valve utilizes a composite two-piece housing to provide a low cost, high strength, light weight alternative to conventional metal and plastic valves adaptable for corrosive and non-corrosive environments. The valve includes a valve body defined by a first body half coupled to a second body half. A

A valve utilizes a composite two-piece housing to provide a low cost, high strength, light weight alternative to conventional metal and plastic valves adaptable for corrosive and non-corrosive environments. The valve includes a valve body defined by a first body half coupled to a second body half. A valve disk assembly is disposed between the first and second body halves. The disk assembly includes a valve disk, a valve stem and a valve seal. The disk stem is positioned within the valve disk along a central axis of the disk such that when the disk is rotated about the valve stem, the valve is opened or closed. The valve seal includes a primary portion lining an interior surface formed by the first and second body halves to engage an outer surface of the disk. The seal also includes a secondary portion disposed within and between the first and second body halves. The primary and secondary sealing portions configured to retain position within the housing and in sealing engagement with the disk.

대표청구항 ▼

1. A composite butterfly valve comprising: first and second body halves each being of composite material, said body halves being secured together along a coupling plane to form a two-part valve body, said body having inlet and outlet flow passageways;a valve disk assembly disposed between said first

1. A composite butterfly valve comprising: first and second body halves each being of composite material, said body halves being secured together along a coupling plane to form a two-part valve body, said body having inlet and outlet flow passageways;a valve disk assembly disposed between said first and second body halves, said disk assembly having a valve disk and a valve stem having a longitudinal axis which lies in the coupling plane of the first and second body halves, said valve stem being within said valve disk along a central axis of said disk such that when said disk is rotated about said valve stem, the disk moves between an open position in which it faces across the flow path between the inlet and outlet flow passages so as to allow the passage of fluid therebetween and a closed position in which it faces along the flow path so as to block the passage of fluid therebetween; anda seal having a primary seal portion and a secondary seal portion disposed between the first and second body halves, the primary seal portion further having an internal surface for sealing against an outer surface of said disk, the secondary seal portion having a substantially triangular cross-section in a plane oriented perpendicular to the coupling plane. 2. A composite butterfly valve in accordance with claim 1, wherein the primary and secondary seal portions are configured to retain respective positions with said housing and to maintain sealing engagement of said primary sealing portion with said disk. 3. A composite butterfly valve in accordance with claim 2 wherein said primary portion of the seal has first and a second cut-away portions, said first cut-away portion positioned within said first body half and said second cut-away portion positioned within said second body half, said first and second cutaway portions for radially retaining the seal within the housing. 4. A composite butterfly valve in accordance with claim 2 wherein said secondary seal portion of the seal has first and second ridged portions extending axially away from the coupling plane, the first and second ridged portions for radially retaining the seal within the housing. 5. A composite butterfly valve in accordance with claim 1, wherein said first body half is coupled to said second body half via a plurality of clamps positioned around said first and second body halves. 6. A composite butterfly valve in accordance with claim 5, wherein each of said clamps is defined by a first and a second section, each of said sections having an extension arm and a ridge, said first section having an extension arm with a curved end bent toward said valve disk, said second section having an extension arm with a curved end bent away from said valve disk, each of said curved ends of said first and second sections engaging respective ridge portions of said first and second sections. 7. A composite butterfly valve in accordance with claim 1 wherein said valve stem includes a first end adapted to receive a mechanism to rotate said disk. 8. A composite butterfly valve in accordance with claim 7, wherein said valve stem has a second end extending through said valve disk into a lower portion of said valve body. 9. A composite butterfly valve in accordance with claim 1 wherein said first body half includes a plurality of cavities interspersed within said body to provide rigidity. 10. A composite butterfly valve in accordance with claim 1, wherein at least one of said first body half and said second body half includes a substantially circular portion to receive said valve disk, said one body half having a groove positioned along said circular portion configured to receive an O-ring, said O-ring providing a seal with a flange portion associated with an attached pipeline. 11. A composite butterfly valve in accordance with claim 1, wherein the valve disk is formed of composite material. 12. A composite butterfly valve in accordance with claim 11, wherein the valve disk is formed with an inner core of short fibre composite material and an outer layer of high resistance long fibre composite material. 13. A composite butterfly valve in accordance with claim 1, wherein the composite material includes up to 60% of inorganic filler. 14. A composite butterfly valve comprising: first and second body halves each molded from composite material, said body halves each being of substantially uniform composition and being secured together along a coupling plane to form a two-part valve body, said body having inlet and outlet flow passageways; anda valve disk assembly disposed between said first and second body halves, said disk assembly having a valve disk and a valve stem having a longitudinal axis which lies in the coupling plane of the first and second body halves, said valve stem being within said valve disk along a central axis of said disk such that when said disk is rotated about said valve stem, it moves between an open position in which it faces across the flow path between the inlet and outlet flow passages so as to allow the passage of fluid therebetween and a closed position in which it faces along the flow path so as to block the passage of fluid therebetween;wherein said first body half is coupled to said second body half via a plurality of clamps positioned around said first and second body halves; andwherein each of said clamps is defined by a first and a second section, each of said sections having an extension arm and a ridge, said first section having an extension arm with a curved end bent toward said valve disk, said second section having an extension arm with a curved end bent away from said valve disk, each of said curved ends of said first and second sections engaging respective ridge portions of said first and second sections. 15. A composite butterfly valve in accordance with claim 14, comprising a seal having a primary seal portion and a secondary seal portion disposed between the first and second body halves, the primary seal portion further having an internal surface for sealing against an outer surface of said disk, the secondary seal portion having a substantially triangular cross-section. 16. A composite butterfly valve in accordance with claim 14, wherein said primary portion of the seal has first and a second cut-away portions, said first cut-away portion positioned within said first body half and said second cut-away portion positioned within said second body half, said first and second cutaway portions for radially retaining the seal within the housing. 17. A composite butterfly valve in accordance with claim 14, wherein said secondary seal portion of the seal has first and second ridged portions extending axially away from the coupling plane, the first and second ridged portions for radially retaining the seal within the housing. 18. A composite butterfly valve comprising: first and second body halves secured together along a coupling plane to form a two-part valve body, said body having inlet and outlet flow passageways;a valve disk assembly disposed between said first and second body halves, said valve disk assembly having a valve disk and a valve stem having a longitudinal axis which lies in the coupling plane of the first and second body halves, said valve stem being rotatable along a central axis such that when said disk is rotated about said valve stem, the disk moves between an open position and a closed position with respect to the flow path between the inlet and outlet flow passages; anda plurality of clamps positioned around the first and second body halves, the plurality of clamps for clamping the first and second body halves together, each of the plurality clamps including first and second sections, each of the first sections having a first extension arm and ridge, the first extension arm having an end bent toward the valve disk, each of the second sections having a second extension arm and a second ridge, the second extension arm having an end bent away from the valve disk, wherein the ends of the first and second extension arms engage the ridges of the second and first and second sections, respectively. 19. A composite butterfly valve in accordance with claim 18, wherein a first one of said plurality of clamps has a first clamp section associated with the first body half and a second clamp section associated with the second body half, and an adjacent second one of said plurality of clamps has a first clamp section associated with the second body half and a second clamp section associated with the first body half. 20. A composite butterfly valve in accordance with claim 19, wherein alternating ones of said plurality of clamps have alternating extension arm end orientations.