The present disclosure relates to a rotary check valve, which utilises the rotation of a rotary element to open and close the valve, rather than pivoting of hinge flappers, such as in other check valve designs. The rotary element is rotatably mounted to a valve plate which features shrouded openings that define windows. A plurality of vanes extending from the rotary element are used to close or open the windows in response to a reverse or forward fluid flow, respectively. This action opens or closes the valve. This design may reduce the force exerted on the valve components when the valve opens and closes, when compared to a pivoting hinge flapper design.

The present disclosure relates to a rotary check valve, which utilises the rotation of a rotary element to open and close the valve, rather than pivoting of hinge flappers, such as in other check valve designs. The rotary element is rotatably mounted to a valve plate which features shrouded openings that define windows. A plurality of vanes extending from the rotary element are used to close or open the windows in response to a reverse or forward fluid flow, respectively. This action opens or closes the valve. This design may reduce the force exerted on the valve components when the valve opens and closes, when compared to a pivoting hinge flapper design.

A product for applying tension is disclosed. The product may include a block with a first bore opening into to the block. A body may be provided having a second bore substantially larger in diameter than the first bore. The body may be positioned against the block so that the first bore is open to the second bore. The body may have a passage for providing fluid to a pressure chamber from the second bore. The passage may be arranged to open to the second bore and form a tangent to the second bore. Fluid may flow from the first bore to the pressure chamber through the second bore and the passage substantially unimpeded. Fluid flow is impeded from the passage to the first bore as a result of the configuration of the first bore, second bore and passage.

A valve module is provided for enabling a vehicle to control an autonomous event of the vehicle. The valve module comprises a relay valve, a first solenoid valve, and a second solenoid valve. A first control pressure can be delivered through the first solenoid valve and applied to a control port of the relay valve. In one embodiment, a second control pressure can be delivered through the second solenoid valve and combined with the first control pressure. The combined first and second control pressures are applied to the control port of the relay valve. In another embodiment, a second control pressure can be delivered through the second solenoid valve only when no first control pressure is delivered through the first solenoid valve.

A valve module is provided for enabling a vehicle to control an autonomous event of the vehicle. The valve module comprises a relay valve, a first solenoid valve, and a second solenoid valve. A first control pressure can be delivered through the first solenoid valve and applied to a control port of the relay valve. In one embodiment, a second control pressure can be delivered through the second solenoid valve and combined with the first control pressure. The combined first and second control pressures are applied to the control port of the relay valve. In another embodiment, a second control pressure can be delivered through the second solenoid valve only when no first control pressure is delivered through the first solenoid valve.

A convertible check valve having a pair of valve body sections, each of which includes a central passageway extending through it is disclosed. Each passageway terminates at an elliptical port. A moveable flapper is located within the check valve between the valve body sections and is movable between a between a closed state and an opened state, and vice versa, to effect the selective closing and opening of the ports. The valve body sections are configured to be rotated 180 degrees with respect to each other so that they are in an either an axially aligned state or in an elbow state. The interface between the passageways is formed by two elliptical shaped planar surfaces, each extending at an angle of 45 degrees to the central axis of the associated passageway. The valve also includes a pressure relief assembly.

A convertible check valve having a pair of valve body sections, each of which includes a central passageway extending through it is disclosed. Each passageway terminates at an elliptical port. A moveable flapper is located within the check valve between the valve body sections and is movable between a between a closed state and an opened state, and vice versa, to effect the selective closing and opening of the ports. The valve body sections are configured to be rotated 180 degrees with respect to each other so that they are in an either an axially aligned state or in an elbow state. The interface between the passageways is formed by two elliptical shaped planar surfaces, each extending at an angle of 45 degrees to the central axis of the associated passageway. The valve also includes a pressure relief assembly.

In a gas analysis apparatus including analyzers that need ignition, such as FIDs, in order to make it possible to surely ignite the analyzers while downsizing the entire apparatus, the apparatus includes first and second analyzers to accept a sample gas, a first gas line provided with the first analyzer, a second gas line provided with the second analyzer and joined downstream of the first analyzer in the first gas line. At least one of the first analyzer and the second analyzer is configured to cause pressure fluctuations in the gas line including the analyzer when analyzing the sample gas. A first backflow prevention mechanism is disposed between another of the analyzers and a junction of the gas lines. The first backflow prevention mechanism is configured to prevent a fluid from flowing backward from the one of the analyzers through the junction toward the another of the analyzers.

The present invention describes a completion system for drilled wells having valves mechanisms, drives, sensors and devices able to promote an exploration of wells, safer, more efficient and, therefore, more economically viable. Specifically, the present invention comprises a system allowing the installation of smart completion in single or multiple producing zones, comprising valves mechanisms, drives, sensors, between other devices disclosed by the present invention. The present invention is in the fields of petroleum engineering and mechanic engineering.

A flush system includes a meter valve, a first pipe, a vacuum breaker, a second pipe, and a ball valve assembly. The meter valve defines a selectively openable outlet. The first pipe is in fluid communication with the meter valve and a water supply source. The vacuum breaker is disposed within the first pipe upstream of the meter valve and oriented to prevent backflow from the meter valve to the water supply source. The second pipe extends from a wall and is downstream from the supply source. The ball valve assembly is disposed between the first pipe and the second pipe upstream of the vacuum breaker to facilitate fluid communication between the first pipe and the second pipe and to selectively isolate the meter valve from the water supply source.