A downhole valve is described. The downhole valve has a pilot valve section and a tool section. The pilot valve section has a first tube. The tool section has a second tube slidably coupled to the first tube of the pilot valve section so as to provide fluid communication between the pilot valve section and the tool section. The tool section can be in the form of a signal valve section of a mud pulse telemetry valve, a reamer, a vertical steerable tool, a rotary steerable tool, a by-pass valve, a packer, a whipstock, or stabilizer.

A downhole valve is described. The downhole valve has a pilot valve section and a tool section. The pilot valve section has a first tube. The tool section has a second tube slidably coupled to the first tube of the pilot valve section so as to provide fluid communication between the pilot valve section and the tool section. The tool section can be in the form of a signal valve section of a mud pulse telemetry valve, a reamer, a vertical steerable tool, a rotary steerable tool, a by-pass valve, a packer, a whipstock, or stabilizer.

A valve actuator control system, and a related manifold. The control system includes a pneumatic directional valve operable to move the actuator. The manifold has multiple internal channels and is mountable to the pneumatic directional valve in alternative connections so that one internal channel of the manifold is active and the others are non-active, so that the manifold and pneumatic directional valve can provide operability of the actuator in a plurality of different fail modes.

A valve actuator control system, and a related manifold. The control system includes a pneumatic directional valve operable to move the actuator. The manifold has multiple internal channels and is mountable to the pneumatic directional valve in alternative connections so that one internal channel of the manifold is active and the others are non-active, so that the manifold and pneumatic directional valve can provide operability of the actuator in a plurality of different fail modes.

In the case of a valve-actuating device (1) having a first valve (3) and a second valve (38), it is provided to form, on the first valve (3), a pressure chamber (14), which can be filled with a pressure from a first inflow (16) via a filling opening (15), wherein the first valve (3) separates the first inflow (16), in a closed position, from a first outflow (19), and wherein the pressure chamber (14) can be emptied into the first outflow (19) via an outflow opening (18), and the outflow opening (18) can be opened and closed by a closure element which can be activated by an operating element (2).

In the case of a valve-actuating device (1) having a first valve (3) and a second valve (38), it is provided to form, on the first valve (3), a pressure chamber (14), which can be filled with a pressure from a first inflow (16) via a filling opening (15), wherein the first valve (3) separates the first inflow (16), in a closed position, from a first outflow (19), and wherein the pressure chamber (14) can be emptied into the first outflow (19) via an outflow opening (18), and the outflow opening (18) can be opened and closed by a closure element which can be activated by an operating element (2).

A valve includes a valve body with an annular valve seat having a first central axis, and a valve closure subassembly assembled with the valve body and including an axially movable valve stem and a stem tip attached to the valve stem by a stem connector and including an annular seal portion having a second central axis. When the first central axis is misaligned with the second central axis, the stem tip is pivotable about the valve stem to effect angular adjustment of the annular seal portion of the stem tip into uniform sealing engagement with the annular valve seat when a closing force is applied to the valve stem. The stem connector is configured to resist pivoting movement of the stem tip when the valve stem is in the open position.

A receiver surge test tool (STT) assembly, system and method for receiver surge pressure testing. The receiver STT assembly has a receiver surge test tool (STT) configured to simulate surge pressure conditions of a receiver aircraft, and to measure one or more surge pressures generated when receiving a fuel flow of fuel from a refueling source during the receiver surge pressure testing that is ground based. The receiver STT has a pipe manifold structure with inlet port(s), outlet port(s), and one or more flow lines disposed therebetween. Each flow line includes a flow meter, a pressure transducer, a shutoff valve having varying valve close rates, and a manual back pressure valve. The receiver STT assembly has a control system for controlling open and close positions of the shutoff valve, and the receiver STT, and has a data system for collecting and recording data generated during the receiver surge pressure testing.

A receiver surge test tool (STT) assembly, system and method for receiver surge pressure testing. The receiver STT assembly has a receiver surge test tool (STT) configured to simulate surge pressure conditions of a receiver aircraft, and to measure one or more surge pressures generated when receiving a fuel flow of fuel from a refueling source during the receiver surge pressure testing that is ground based. The receiver STT has a pipe manifold structure with inlet port(s), outlet port(s), and one or more flow lines disposed therebetween. Each flow line includes a flow meter, a pressure transducer, a shutoff valve having varying valve close rates, and a manual back pressure valve. The receiver STT assembly has a control system for controlling open and close positions of the shutoff valve, and the receiver STT, and has a data system for collecting and recording data generated during the receiver surge pressure testing.

A valve with an internal member is disclosed which allows exhaled carbon dioxide to escape from a breathing circuit when the circuit gas pressure drops below a threshold pressure. The valve operates by occluding one or more ports under a relatively high pressure and opening the one or more ports under a relatively low pressure. The internal member is attached to the body of the valve at two or more locations on the internal member. The internal member moves in a direction perpendicular to the gas flow through the valve.