An equalization valve includes a valve body defining a gate slot; a gate defining an equalization chamber, a first equalization channel, and a second equalization channel, the equalization chamber and the first and second equalization channels defining an equalization pathway across the gate; and an actuation stem slidable within the equalization chamber between a first chamber position, wherein the actuation stem blocks the equalization pathway, and a second chamber position, wherein the actuation stem unblocks the equalization pathway; wherein the actuation stem is further slidable within the gate slot of the valve body between a first valve position, wherein the gate is seated with the valve body, and a second valve position, wherein the gate is unseated from the valve body.

An equalization valve includes a valve body defining a gate slot; a gate defining an equalization chamber, a first equalization channel, and a second equalization channel, the equalization chamber and the first and second equalization channels defining an equalization pathway across the gate; and an actuation stem slidable within the equalization chamber between a first chamber position, wherein the actuation stem blocks the equalization pathway, and a second chamber position, wherein the actuation stem unblocks the equalization pathway; wherein the actuation stem is further slidable within the gate slot of the valve body between a first valve position, wherein the gate is seated with the valve body, and a second valve position, wherein the gate is unseated from the valve body.

Example aspects of an equalization valve are disclosed. The equalization valve can comprise a gate defining a first face, a second face, and a sidewall extending between the first face and second face, the gate further defining an equalization chamber extending into the sidewall, a first equalization channel extending from the first face to the equalization chamber, and a second equalization channel extending from the second face to the equalization chamber; and an actuation stem defining a lower portion slidably engaged with the equalization chamber, the actuation stem movable between a first position, wherein the actuation stem blocks the first equalization channel to prevent the flow of one of gas and fluid through the equalization valve, and a second position, wherein the actuation stem unblocks the first equalization channel to allow the flow of the one of gas and fluid through the equalization valve.

Example aspects of an equalization valve are disclosed. The equalization valve can comprise a gate defining a first face, a second face, and a sidewall extending between the first face and second face, the gate further defining an equalization chamber extending into the sidewall, a first equalization channel extending from the first face to the equalization chamber, and a second equalization channel extending from the second face to the equalization chamber; and an actuation stem defining a lower portion slidably engaged with the equalization chamber, the actuation stem movable between a first position, wherein the actuation stem blocks the first equalization channel to prevent the flow of one of gas and fluid through the equalization valve, and a second position, wherein the actuation stem unblocks the first equalization channel to allow the flow of the one of gas and fluid through the equalization valve.

A gate valve and method according to which a gate body extends within a valve cavity, a fluid bore extends through the gate body, and a passage extends from the fluid bore, through the gate body, and to the valve cavity. The valve cavity is pressurized with a lubricant to prevent, or at least resist, solid particles (e.g., sand, fines, debris, etc.) from entering the valve cavity. The valve cavity and the fluid bore are pressure balanced. In some embodiments, a flow valve, such as a check valve or one-way valve, is positioned within the passage.

A valve device is provided. In the valve device, a valve element is rotated about a support shaft, based on rotation of a valve element drive member to switch a through hole that communicates with an outlet formed in a valve seat to adjust a flow rate. The through hole opens in a bottom surface of a flow channel securing groove formed in the valve element. The flow channel securing groove has a long hole shape in which a width in a first direction being a moving direction of the valve element, is smaller than a width in a second direction orthogonal to the first direction. Thus, a region overlapping with the outlet is large as compared to a case where a perfect circular flow channel securing groove is formed.

A gate valve adapted for use in oil and gas operations, such as, for example, fracturing or gravel-packing operations. In an exemplary embodiment, the gate valve includes a valve body, which defines an internal region; a first fluid bore intersecting the internal region and defining a first interior surface in the valve body; and a first annular recess formed in the first interior surface and adjoining the internal region. A first seat element defines a second fluid bore and extends within the first annular recess. A first protective sleeve extends between respective portions of the first seat element and the valve body. The first and second fluid bores have first and second full-bore inside diameters, respectively. The first protective sleeve has a third full-bore inside diameter that is substantially equal to each of the first and second full-bore inside diameters.

A gate valve adapted for use in oil and gas operations, such as, for example, fracturing or gravel-packing operations. In an exemplary embodiment, the gate valve includes a valve body, which defines an internal region; a first fluid bore intersecting the internal region and defining a first interior surface in the valve body; and a first annular recess formed in the first interior surface and adjoining the internal region. A first seat element defines a second fluid bore and extends within the first annular recess. A first protective sleeve extends between respective portions of the first seat element and the valve body. The first and second fluid bores have first and second full-bore inside diameters, respectively. The first protective sleeve has a third full-bore inside diameter that is substantially equal to each of the first and second full-bore inside diameters.

A pressure reducing valve includes: a housing having an input port, an input channel connected to the input port, a pressure reducing chamber connected to the input channel, a delivery channel connected to the pressure reducing chamber, an output channel and an auxiliary channel branched off from the delivery channel, an output port connected to the output channel, and an auxiliary port connected to the auxiliary channel; and a valve mechanism which is provided inside the pressure reducing chamber connected to the delivery channel and of which the amount of opening is changed to regulate the pressure inside the pressure reducing chamber. Centerlines of the delivery channel, the output channel, and the auxiliary channel are arranged in the same plane.

A water valve may include a valve shell, and a rotating base is installed in the valve shell. A lower end of the rotating base is sequentially connected to a driving valve piece and a fixed valve piece, and the driving valve piece and the fixed valve piece are installed in the valve shell. A bottom portion of the driving valve piece comprises a concave portion to form a mixing chamber, and the mixing chamber has a first mixing space and a second mixing space, and the diameter of the first mixing space is larger than the second mixing space so as to increase the coverage of the mixing chamber. Each of two sides of the second mixing space comprises a pressure relief slot.