High differential pressure, low torque precision temperature control valve
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F16K-005/20
F16K-005/00
출원번호
US-0962897
(2007-12-21)
등록번호
US-7448410
(2008-11-11)
발명자
/ 주소
Keiser,David Burton
출원인 / 주소
Griswold Controls Inc
대리인 / 주소
Law Office of Ken Dallara
인용정보
피인용 횟수 :
3인용 특허 :
10
초록▼
A high differential pressure, low torque precision temperature control valve is disclosed herein. This valve is trunnionated with stem components that are separable from the plug for ease of maintenance and manufacturability and thus reducing the need to remove the entire plug and sealing assemblies
A high differential pressure, low torque precision temperature control valve is disclosed herein. This valve is trunnionated with stem components that are separable from the plug for ease of maintenance and manufacturability and thus reducing the need to remove the entire plug and sealing assemblies in the field. Field repair of stem sealing devices can be accomplished inline. The stem design can be smaller in diameter with smaller bearing surfaces than would be anticipated creating a lower requirement of torque to rotationally transposition the plug within the fluid chamber while under high pressure. This valve's lower trunnionated stem is stationery reducing the problems associated with o-ring failure and leakage problems with objects that rotate. Due to the design of the orifices in the plug, this valve is capable of repeatability at lower opening ranges than prior art valves and reduces jetting, caviation and erosion often associated with lower opening ranges. Sealing devices are tensioned onto the plug through the use of non-metallic o-rings reducing wear and friction issues thereby further reducing the torque requirement to adjust the valve. This valve is created in a bypass configuration, and as such, the plug orifices have been modified to efficiently reduce pump loads in the full bypass condition. The throughports of the plug in this valve are designed such as to create an equal percentage characteristic that does not exceed prescribed linear flow characteristics and provides a relatively constant total combined Cv over the travel range of the plug. It is preferable that this valve is made from cast iron components, but other materials who have similar stabilities over the pressure ranges and fluid characteristics introduced are acceptable.
대표청구항▼
What is claimed is: 1. A high differential pressure, low torque precision temperature control valve comprising; a fluid chamber; a fluid acceptance passageway, at least one fluid bypass passageway and a fluid discharge passageway each having interior and exterior edges; a valve body, having upper a
What is claimed is: 1. A high differential pressure, low torque precision temperature control valve comprising; a fluid chamber; a fluid acceptance passageway, at least one fluid bypass passageway and a fluid discharge passageway each having interior and exterior edges; a valve body, having upper and lower stanchions, where said interior edge of said fluid acceptance and said interior edge of said fluid discharge passageways are axially disposed and appurtenant to opposite ends of said fluid chamber and said interior edge of said fluid bypass passageway is angularly disposed along the horizontal axis of said fluid chamber, interposed between said interior edge of said fluid acceptance passageway and said interior edge of said fluid discharge passageway, and appurtenant to said fluid chamber; an attachment means connected onto said exterior edge of said fluid acceptance said exterior edge of said fluid bypass and said exterior edge of said fluid discharge passageways; a plug centrally interposed therein said fluid chamber, spherically shaped, possessing an upper boss and a lower borehole centrally disposed on the parameter of said plug along the vertical axis of said plug, and a set of orifices diametrically opposed, juxtapositionally opposite, along the parameter of said plug along the horizontal axis of said plug and at least one orifice, corresponding to said bypass passageway, angularly aligned along the parameter of said plug along horizontal axis of said plug, where said horizontal axis of said plug is coincident with the horizontal axis of said fluid acceptance, said fluid bypass and said fluid discharge passageways, said upper boss is adapted to receive rotational transpositional means for said plug, said lower borehole adapted to forcibly receive a plate, said plate has externally mounted thereonto a lower stem receiving post; a two sided raceway circumferentially described onto and near said interior edge of said fluid acceptance, said interior edge of said bypass passageway, and said interior edge of said fluid discharge passageways, said raceway having a depth and a height component; a circumferential groove circumscribed within said raceway; a set of non-metallic sealing members, elliptical in profile, disposed within said circumferential grooves; a set of polymer based seals, polygonal in profile, in sustained contact with said plug, having a radiused face, a lower frontal area, an upper frontal area, a flat bottom less in length than said depth component of said raceway, and an exterior side adapted to receive a portion of said sealing member; an upper stem, superimposed internally to said upper stanchion having an anterior and a dorsal end, where said anterior end is adapted to frictionally interface with said upper boss of said plug, said upper stem providing rotational transpositional means to change position of said plug along said vertical axis of said plug, said dorsal end of said upper stem is adapted to receive an actuator interface; and a lower stem, superimposed internally, to said lower stanchion, stationaryily mounted to exterior end of said lower stanchion and bearingly mounted into said lower stem receiving post. 2. A high differential pressure, low torque precision temperature control valve as in claim 1 where said raceway has installed thereon a containment ledge containing movement in the plane of decompression of said sealing member, said ledge to be no greater than a distance whereby said sealing member has not less than 10% compression when said seal is in contact with said ledge. 3. A high differential pressure, low torque precision temperature control valve as in claim 2 where said lower frontal area of said seal is adapted to interface with said containment ledge. 4. A high differential pressure, low torque precision temperature control valve as in claim 1 where plane of said sealing member decompression is parallel to horizontal axis of said plug. 5. A high differential pressure, low torque precision temperature control valve as in claim 1 where plane of said sealing member decompression is parallel to vertical axis of said plug. 6. A high differential pressure, low torque precision temperature control valve as in claim 1 where an o-ring is placed along the interface of said valve body to said fluid acceptance passageway, along interface between said valve body and said bypass passageway, and said valve body interface with said fluid discharge passageway to prevent leakage. 7. A high differential pressure, low torque precision temperature control valve as in claim 1 where said radiused face of said seal is coincident with outer radius of said plug. 8. A high differential pressure, low torque precision temperature control valve as in claim 1 where major diameter of said elliptical profile of said sealing member is such as to maintain at least 10% compression whilst said plug is in contact with said seal. 9. A high differential pressure, low torque precision temperature control valve as in claim 1 where said upper stem and said lower stem are adapted to receive o-rings to prevent leakage. 10. A high differential pressure, low torque precision temperature control valve as in claim 1 where said orifices are two parabolically shaped curves symmetrical about their directrix, apex of said curves are mathematically derived from and proportionally related to flow requirements of valve, said apexes joined by radiused segment.
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이 특허에 인용된 특허 (10)
Sahba Bahman (Warwick RI) Champlin ; Jr. Harry C. (Hopkinton RI) Cory John M. (Old Lyme CT), All-metal, valve sealing mechanism.
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