The disclosure provides a control valve which includes a valve body and a valve gate. The valve gate is movably located inside the inner space. The control valve has a lower flow rate limit which is greater than zero. That is, the lower flow rate limit has no necessary to be zero, thus it is acceptable to have a cylindrical valve gate but not a spherical valve gate, and a diameter of the cylindrical valve gate is be smaller than a caliber of an opening of the valve body. Therefore, the valve gate can be directly installed into the valve body via the opening, which allows the valve body to be made of a single piece so as to simplify the processes of manufacturing and assembly.

The disclosure provides a control valve which includes a valve body and a valve gate. The valve gate is movably located inside the inner space. The control valve has a lower flow rate limit which is greater than zero. That is, the lower flow rate limit has no necessary to be zero, thus it is acceptable to have a cylindrical valve gate but not a spherical valve gate, and a diameter of the cylindrical valve gate is be smaller than a caliber of an opening of the valve body. Therefore, the valve gate can be directly installed into the valve body via the opening, which allows the valve body to be made of a single piece so as to simplify the processes of manufacturing and assembly.

A valve assembly includes a housing, a segmented stem, a ball segment, a biasing element, and an adjustment bolt. The housing includes a flow duct connecting a first flow opening to a second flow opening and a neck defining an elongated chamber. The segmented stem includes an upper portion and a lower portion, wherein the upper portion is positioned within the elongated chamber and the lower portion is coupled to the housing. The ball segment includes a first attachment portion, a second attachment portion, and a curved portion extending between the first attachment portion and the second attachment portion. The biasing element is positioned between the first attachment portion and the upper portion. The adjustment bolt is coupled to the lower portion, wherein the biasing element and the adjustment bolt adjusts the ball segment toward a seated position when the ball segment is rotated to a closed position.

A valve assembly includes a housing, a segmented stem, a ball segment, a biasing element, and an adjustment bolt. The housing includes a flow duct connecting a first flow opening to a second flow opening and a neck defining an elongated chamber. The segmented stem includes an upper portion and a lower portion, wherein the upper portion is positioned within the elongated chamber and the lower portion is coupled to the housing. The ball segment includes a first attachment portion, a second attachment portion, and a curved portion extending between the first attachment portion and the second attachment portion. The biasing element is positioned between the first attachment portion and the upper portion. The adjustment bolt is coupled to the lower portion, wherein the biasing element and the adjustment bolt adjusts the ball segment toward a seated position when the ball segment is rotated to a closed position.

A pressure control system configured to respond to high-pressure conditions in a fluid conduit is disclosed. The system generally includes first and second flow restrictors positionable inline on a fluid conduit and configured to block fluid flow in the conduit and respond to a high-pressure event to allow fluid flow therethrough. The first flow restrictor is position upstream from the second flow restrictor and may open to allow fluid flow in response to the high-pressure event. The second flow restrictor provides adjustable flow of fluid therethrough or may open a bypass line in response to the high-pressure event to allow unrestricted fluid flow therethrough.

A control valve includes a valve housing, a first inlet port and a second inlet port that are formed on the valve housing and through which a coolant is drawn, a first outlet port and a second outlet port that are formed on the valve housing and through which the coolant is discharged, and a ball valve rotatably disposed within the valve housing, and configured to fluidically communicate the first inlet port and the first outlet port and fluidically communicate the second inlet port and the second outlet port, or fluidically communicate the first inlet port and the second outlet port and fluidically communicate the second inlet port and the first outlet port.

A control valve includes a valve housing, a first inlet port and a second inlet port that are formed on the valve housing and through which a coolant is drawn, a first outlet port and a second outlet port that are formed on the valve housing and through which the coolant is discharged, and a ball valve rotatably disposed within the valve housing, and configured to fluidically communicate the first inlet port and the first outlet port and fluidically communicate the second inlet port and the second outlet port, or fluidically communicate the first inlet port and the second outlet port and fluidically communicate the second inlet port and the first outlet port.

A pressure bleed-off system. The system includes a fluid bypass line having an inlet and an opposing outlet, wherein the inlet is in fluid communication with a high pressure frac line for a hydraulic fracturing operation. The system also includes a high-pressure transducer located proximate the fluid inlet, a first plug valve residing along the fluid bypass line, and a first electric actuator residing on the first plug valve. The actuator is configured to rotate the first plug valve between close and open positions in response to command signals from a controller. The controller, in turn, sends the command signals in response to control signals delivered by an operator, remotely. Preferably, the command signals are wireless signals sent from outside of the red zone. The system may also include a second plug valve along the bypass line.

A control valve includes a body having an inlet and an outlet and a valve seat positioned in a passageway between the inlet and the outlet. A valve plug is positioned within the body and is movable between an opened position and a closed position to modulate a fluid flow at the outlet. A cage is disposed within the body adjacent the valve seat and proximate the valve plug and has a circumferential wall having an outer surface and an inner surface aligned along a longitudinal axis of the cage. The outer surface of the cage defines an outer flow length and the inner surface defines an inner flow length that is less than the outer flow length.

A control valve includes a body having an inlet and an outlet and a valve seat positioned in a passageway between the inlet and the outlet. A valve plug is positioned within the body and is movable between an opened position and a closed position to modulate a fluid flow at the outlet. A cage is disposed within the body adjacent the valve seat and proximate the valve plug and has a circumferential wall having an outer surface and an inner surface aligned along a longitudinal axis of the cage. The outer surface of the cage defines an outer flow length and the inner surface defines an inner flow length that is less than the outer flow length.