Abstract:
Valve (100) comprising a valve body (101) having an upstream conduit (110) for the inflow of a fluid and a downstream conduit (120) for the outflow of a fluid, said conduits (110, 120) being substantially aligned along a longitudinal axis (X-X), a rotative ball (10) for controlling the fluid passage and having a cavity (11) with axis perpendicular to its rotating axis (Y-Y), a first upstream seat (210) operating in conjunction with said upstream conduit (110) and said rotative ball (10), a first downstream seat (220) operating in conjunction with said downstream conduit (120) and said rotative ball (10), a second downstream seat (420) axially arranged between said first downstream seat (220) and said downstream conduit (120), and an intermediate element (320) axially arranged between said first downstream seat (220) and said second downstream seat (420) and axially moveable between said first downstream seat (220) and said second downstream seat (420).
Abstract:
A trip valve for a steam turbine is provided and a method for upgrading the trip valve. The trip valve (200) includes a valve body (202) defining a cavity (204), a first port (206) and a second port (208). The first and second ports are fluidly coupled with the cavity. A ball (224) defining a passage (206) is disposed in the cavity and configured to selectively provide fluid communication between the first and second ports via the passage thereof. First (242) and second (244) valve seats are disposed in the cavity and configured to at least partially support the ball in the cavity. The first valve seat is disposed between the ball and the first port, and the second valve seat is disposed between the ball and the second port. The trip valve further includes a first biasing member (258) and a second biasing member (260) configured to urge the first valve seat and the second valve seat, respectively, toward the ball.
Abstract:
A valve including a double piston effect seat assembly with unidirectional lip seals is provided. In one embodiment, a valve includes a ball (20) disposed in a cavity (58, 98) of a hollow valve body (12). The ball includes a flow port (22) and is rotatable to control flow through the valve. The valve also includes a seat assembly (26, 34, 76) having a seat (38, 80) in contact with the ball, a ring (40, 82) positioned on an opposite side of the seat from the ball, and unidirectional lip seals (46, 48, 50, 90, 92, 94). The seat assembly is a double piston seat assembly, with the double piston effect provided by the arrangement of the seat, the ring, and the unidirectional lip seals. Additional valve systems, devices, and methods are also disclosed.
Abstract:
Kugelhahn (1) mit drei in einen Innenraum (17) mündende Anschlüsse aufweisenden Gehäuse (2) und einem in dem Innenraum (17) drehweglich gelagerten von einer Stellvorrichtung angetriebenen hohlen Kugelkücken (18), welches eine Einlass- (23) und eine Auslassöffnung (24) aufweist, die beide miteinander verbunden sind, bei dem die Anschlüsse (5) als Stufenbohrungen (11) gestaltet und die Stufen als Lagerflächen (15) für je einen O-Ring (16) ausgeführt sind, dessen Gegenlager von einer stirnseitig angeordneten weiteren Lagerfläche (19) eines in den Anschluss (5) geschraubten Kanalstückes (21) gebildet sind, wobei lediglich die O-Ringe (16) das Kugelkücken (18) lagern.
Abstract:
A ball valve having reduced torque requirements for rotation is presented. Torque reduction is realized by providing a shaped sealing back member to provide a back force behind essentially the entire sealing surface of the downstream seal. Torque reduction is also realized by providing a dynamic sealing configuration that varies the sealing force over the valve's operating pressure conditions. An initial bias sealing force is applied by a spring member which also provides a low uniform as-assembled valve torque. As fluid pressure increases, the sealing pressure also increases as an o-ring is forced along a ramped surface of the seal. As inlet pressure decreases, the o-ring is allowed to back down the ramped surface to reduce the sealing force against the valve member. This sealing configuration allows for reverse flow or improper installation of the ball valve, and bottoms out to maintain a sealing force at higher back pressure conditions.
Abstract:
A control valve of the ball type with bi-directional shutoff capabilities is disclosed. The ball valve (20) including an inlet (31) and an outlet (32) a ball element (80) and a seal assembly. When closing the valve, the ball element, which is eccentrically mounted on a shaft (90,91) , rotates to abut the seal assembly (50) . While closed, the seal assembly including a seal housing (52) , a main seal (64) and a resilient member, contacts the ball element at the main seal, while the resilient member (70) biases the main seal toward the ball element. The seal assembly further includes a secondary flowpath (72) between the main seal and seal housing, which is restricted by a high temperature seal .
Abstract:
Control- or shut-off valves of the type having a rotatable shut-off member (4) in the form of a ball or a segment or a sector of a ball in a valve housing. A seat ring (10) is lodged to slide in a recess (11) in the valve housing or between the valve housing and a cover plate (3). A springing and sealing member (30) is provided at the rear of the seat ring in order to press the seat ring against the sealing surface (12) of the shut-off member and to prevent leakage in the region of the seat ring. The springing and sealing member in accordance with a preferred embodiment consists of a ring which in cross section has the substantial form of a Z or an S.
Abstract:
Vorgeschlagen ist ein Kühlmittelregler (1) einer Verbrennungskraftmaschine, mit einem Gehäuse (2), in dem zwei Kühlmittelkanäle (3, 4) angeordnet sind, die fluidisch durch einen Drehschieber (5) mit einer Kugeloberfläche (9) verbindbar sind, wobei zwischen dem Drehschieber und einem der Kühlmittelkanäle eine Primärdichtung (6, 7) angeordnet ist, die die Kugeloberfläche dichtend kontaktiert und bei Verdrehung des Drehschiebers eine die Kugeloberfläche durchsetzende Öffnung (12) überstreicht, um den einen Kühlmittelkanal mit dem Inneren des Drehschiebers fluidisch zu verbinden. Auf dem Drehschieber soll eine Hilfsgeometrie (10) mit einer geschlossenen Umrandungskontur (15) angeordnet sein, die von der Öffnung beabstandet ist und bei Verdrehung des Drehschiebers den dichtenden Kontakt zwischen der Kugeloberfläche und der Primärdichtung unterbricht, wobei die Hilfsgeometrie jeweils als Erhebung und/oder als Vertiefung lediglich auf der Kugeloberfläche ausgebildet ist.
Abstract:
The invention relates to a ball valve (1) comprising a valve body (2) which delimits a sealing seat (4, 46), a ball seat (6) and at least three fluidic ducts (8, 8', 8") which converge in the ball seat (6), a hollow ball (14), received in the ball seat (6) and movable to allow/prevent the fluidic communication between the fluidic ducts, two or more sealing elements (10, 10', 12), at least one thereof placed into the sealing seat (4, 46) in abutment with the ball (14), whereby only one of the ducts acts as introduction duct (8) of the sealing element (10, 12) and of the hollow ball (14) inside the valve body (2), to position them into the respective seats (4, 46, 6). The valve further comprises a ball-compressing element (16) which delimits a further sealing seat (4') to receive the other sealing element (10') and connected to the introduction duct (8) of the valve body (2) to press the element (10') against the ball. The invention further relates to a manufacturing method.
Abstract:
본 발명은 내부에 경사면이 형성된 몸체; 상기 몸체에 결합되며, 내경면에 걸림턱이 형성된 연결체; 상기 몸체에 삽입되어 상기 경사면에 일측면이 접촉되고, 핸들의 조작에 의해 유체통로를 개폐하는 볼부재; 상기 볼부재에 일측면이 접촉되며, 타측에 끼움홈이 형성되고, 외경면에 한 쌍의 홈부가 형성된 탄성력인가부재; 및 일측은 상기 걸림턱에 지지되며, 타측은 상기 끼움홈에 끼워져 상기 탄성력인가부재에 탄성력을 인가하는 탄성부재;를 포함하여 구성되되, 상기 탄성부재의 탄성력에 의해 볼부재와 경사면 및 탄성력인가부재가 지속적으로 밀착되도록 하는 것을 기술적 특징으로 한다.