A fuel system includes a fuel tank that has a wall with an opening. A fuel float valve includes a float and a seal plate that are arranged on opposing ends of a beam. A support carries a connection of the beam. The beam is configured to translate along the support at the connection in response to a changing fuel level. The fuel float valve is movable between first and second positions in which the seal plate is respectively unsealed and sealed relative to the opening. The seal plate is movable relative to the opening in the second position.

A constant-volume combustion chamber for an aircraft turbine engine, including a compressed gas intake valve configured to adopt an open position and a closed position, and in the closed position blocking intake of compressed gas into the chamber, and a combusted gas exhaust valve configured to adopt a closed position, in the closed position blocking exhaust of combusted gas outside the chamber. At least one of the intake and exhaust valves includes at least one spherical plug.

A method for controlling fluid flow in a stream, the method including using a valve, the valve with a valve body in which is rotatably mounted a valve member, the valve member having therein a ball check for selectively preventing fluid flow through the valve; and such a method for producing an exit stream from a valve.

A valve with a valve body in which is rotatably mounted a valve member, the valve member having therein a ball check for selectively preventing fluid flow through the valve.

A ball check valve controls the flow of fluid with a sphere. A body has a fluid path and a recess for receiving the sphere in alignment with the fluid path. The sphere has a retainer which secures a ball check within it. When the valve is in a Run position and the rate of fluid flow increases excessively, the ball check seats in a narrow opening of the sphere, thus restricting the flow of fluid.

A constant-volume combustion chamber for an aircraft turbine engine, including a compressed gas intake valve configured to adopt an open position and a closed position, and in the closed position blocking intake of compressed gas into the chamber, and a combusted gas exhaust valve configured to adopt a closed position, in the closed position blocking exhaust of combusted gas outside the chamber. At least one of the intake and exhaust valves includes at least one spherical plug.

A condensate drain is described. The condensate drain comprises a thermodynamic actuator and a closing arrangement. The closing arrangement is configured to switch a fluid connection between a first connector and a second connector of the condensate drain in a thermodynamically controlled manner by the thermodynamic actuator. In order to achieve an improved cleaning capability, the condensate drain further comprises an adjusting device attached to the closing arrangement, wherein the adjusting device switches the fluid connection between the first connector and the second connector. A processing system simplified by the condensate drain is also described.

A constant-volume combustion chamber for an aircraft turbine engine, including a compressed gas intake valve configured to adopt an open position and a closed position, and in the closed position blocking intake of compressed gas into the chamber, and a combusted gas exhaust valve configured to adopt a closed position, in the closed position blocking exhaust of combusted gas outside the chamber. At least one of the intake and exhaust valves includes at least one spherical plug.

A blowout preventer (BOP) includes a housing comprising a vertical bore extending through the housing and a shear body rotatable with respect to the vertical bore to shear an object located within the vertical bore.

A valve device comprises a body, a rotating valve set and a safety valve set. The body comprises an inner space, a first opening and a second opening. When the rotating valve set is located in a water-providing position, the inner space, the first opening and the second opening are communicable. When water pressure is higher than a safe pressure, the safety valve set and the rotating valve set can block the first opening and the second opening that safe pressure is maintained at the second opening. When water pressure becomes normal, the safety valve set is moved to its original position. Therefore, it has a piston-typed safety valve set is highly reliable. It has a coaxial structure to reduce its volume. It has an engaging and hooking structure for precise and easy assembly. It has an opening and/or closing function for its valve body with wide range of applications.