The present invention relates to a check valve and, more particularly, to a check valve comprising a main disk and a separate auxiliary disk, the main disk making a rapid closing operation, and the auxiliary disk, which has an area smaller than that of the main disk, making a slow closing operation, thereby reducing the velocity of a reverse flow inside a conduit, right before the disks are finally closed, and preventing a slam (a characteristic phenomenon wherein, when the disks are closed with a bang, an instantaneous increase in pressure wave raises the possibility of piping fracture and causes noise and vibration) of the disks and water hammer.

A ball valve apparatus with an improved linearity of fluid flow therethrough is provided. The ball valve includes a valve housing including a housing inlet and a housing outlet; a valve ball receivable within the valve housing, the valve ball having a bore therethrough, a ball inlet and ball outlet of the valve ball which are in fluid communication with the bore, a fluid flow path through the ball valve apparatus being defined at least in part by the housing inlet, housing outlet, ball inlet, ball outlet and the bore. There is also provided a valve stem engagable with the valve ball and. To control the fluid flow through the apparatus such that there is a linear or substantially linear relationship between at the angular position of the valve ball and the fluid flow through the apparatus, there may be provided at least one bridging element, positioned on the fluid flow path to alter a fluid flow thereacross and/or ball outlet, and/or at least one of the ball inlet and ball outlet may have a non-circular profile. A ball valve for such an apparatus is also provided, in addition to method of improving the linearity of fluid flow through a ball valve apparatus.

Embodiments provide a surge suppression device, a surge suppression system, and methods for operating the same. The surge suppression device includes a valve body and a plug. The plug is rotatably positioned in a hollow space of the valve body. The plug includes two surge suppression openings defining a fluid flow directed to surge suppression. Each of the two surge suppression openings includes a circular plate having a plurality of orifices. The plurality of orifices allows reduction of surge pressure when the water passes the first fluid flow path. The circular plate has a concave or convex geometry.

There is provided a seal assembly comprising: a first component and a second component spaced apart from the first component so as to define a passage for the transfer of fluid from an inlet of the seal assembly to an outlet of the seal assembly, wherein the first component comprises a concavity at least partially defining the passage, and wherein no part of the second component extends into the portion of the passage bounded by the concavity.

A component for a ball valve that is configured to reduce noise. The component or “shoe” can install into the valve body, for example, on a downstream side of a throttling ball. In one implementation, the embodiments comprise an annular ring with an inner surface and an outer surface. The inner surface is cupped to receive a portion of the throttling ball. The outer surface may have a stepped profile with portions of the annular ring that have concentrically-decreasing diameter. This stepped profile sits in a corresponding recess in the valve body. Welds can be used to secure the shoe in place in lieu of fasteners, like bolts or screws.

Disclosed herein are embodiments of a value assembly, methods of manufacturing the same, and methods of using the same. In one embodiment, a sensor assembly comprises a housing having a through-bore, a first flap coupled to a first shaft and a second flap coupled to a second shaft, wherein the first shaft and the second shaft are coupled within the housing; and one or more gear assemblies coupled to the first shaft and the second shaft, wherein the gear assemblies are configured to rotate the first flap and the second flap from a first position to a second position to prevent a flow from traversing through the through-bore, and from the second position to the first position to allow the flow to traverse through the through-bore.

An example valve includes a valve body, a cage, and a plug. The valve body includes a fluid passageway extending between a fluid inlet and a fluid outlet. The cage and the plug are disposed in the fluid passageway. The cage includes a first annular sidewall having an inner layer and an outer layer that circumscribes the inner layer. The inner layer includes first openings extending through the inner layer. The outer layer includes second openings extending through the outer layer. The second openings are in fluid communication with the first openings. The second openings are smaller than the first openings. The plug includes a second annular sidewall circumscribed by the first annular sidewall. The second annular sidewall includes third openings extending through the second annular sidewall. The plug is movable relative to the cage to selectively place the third openings in fluid communication with the first openings.

An apparatus for noise reduction in valves is disclosed. A disclosed example valve includes a valve body including a fluid passageway, and a cage located in the fluid passageway, the cage including a wall having openings, a fluid to flow from an inner surface of the wall to an outer surface of the wall through the openings, each of the openings including respective ribs, the ribs to follow a helical path along a length of each opening to cause rotation of the fluid flowing through the openings.

A ball valve trim apparatus for high differential pressure service that is resistant to erosion includes elements selected from a plurality of stacked impedance trim plates positioned in the passage of the ball portion of the valve; the plates being independently adjustable along transverse axes that are parallel to the axis of rotation of the ball: one or more of the plates having a convex upstream contour, each plate provided with a predetermined pattern of variously sized fluid passageways, the pattern varying from plate-to-plate in the stack; erosion-resistant bushings inserted into the trim plate holes can be independently rotationally adjustable to control the rate of the flowing fluid, the upstream surface of the plate surrounding the orifice of the bushing defining a raised toroidal body.

A valve trim includes a body having a plurality of parallel flow passages extending from a first end of the body to a second end of the body, opposite the first end. Each flow passage includes a throat and an expansion chamber and each throat is nested between the expansion chambers of directly adjacent flow passages.