A backwater gate valve assembly having a gate valve movable between a closed position where the gate occludes an outlet opening and an open position where the gate valve does not occlude the outlet opening. The gate valve is coupled to a motorized actuator that is configured to move the gate valve between the open and closed positions upon sensing of a predetermined level of water in the body of the backwater gate valve assembly.

A subsea shutoff device, in particular for use in water depths of more than 30 m for operating a valve with a gate with a waterproof, oil filled housing, a crank mechanism arranged in the housing, and a rotary actuator, wherein the rotary actuator is adapted to operate a gate of a valve via the crank mechanism.

A coupler that separates a unitary valve stem into two separate but coupled sections to isolates the thrust load from the torque load.

A valve operating device includes a base having a housing thereon. A motor, a motor controller unit, and a human machine interface controller are disposed in the housing. A display device mounted on top of the housing is controlled by the human interface controller to display control screens and receive user input. The operator controls operation of the device at a home control screen, which displays information regarding the exercise of the valve as it is acquired. Data configuration and storage functions are controlled via a valve data record screen and identifier screens accessible from the home control screen.

A cooling system of an internal combustion engine includes a control valve that regulates the flow of a coolant in a circulation circuit, and an electronic control unit. The electronic control unit is configured to have the following functions: controlling the driving of a motor of the control valve; calculating a motor torque based on an effective voltage applied to the motor; calculating a valve body torque that is part of the motor torque, based on an angular acceleration rate of the motor; and calculating a driving stress based on a difference between the motor torque and the valve body torque.

An expansion valve operable by a stepper motor, the expansion valve including a housing; a hollow shaft arranged in the housing; a valve base that supports the hollow shaft and closes the housing; a rotor drivable by a stator of the stepper motor; a center spool arranged in the hollow shaft and drivable by the rotor so that a rotation of the center spool is transferrable by a threaded connection into an axial movement of the center spool that opens or closes the expansion valve; and a sleeve that includes a receiving portion that includes at least portions of the center spool, of a compression spring and of a force transmission element respectively and a valve needle, wherein the receiving portion of the sleeve element is closed by a bushing.

A dual trip manifold assembly (TMA) includes an isolation valve assembly having a first valve configured to receive a flow of fluid from a hydraulic system fluid supply. The first valve is configured to channel the flow of fluid to at least one hydraulic circuit. The isolation valve assembly also includes a second valve configured to receive the flow of fluid from the at least one hydraulic circuit of the at least two hydraulic circuits. The second valve is further configured to channel the fluid flow to a trip header and to receive the fluid flow from the trip header. The first valve and the second valve are synchronized to each other such that rotation of one of said first and second valves causes a substantially similar rotation in the other of said first and second valves header.

An evaporated fuel treatment device is provided with an electric-operated valve, a positive-pressure relief valve mechanism and a negative-pressure relief valve mechanism. The electric-operated valve has a valve body for opening/closing a vapor passage allowing a fuel tank and a canister, and adjusts the flow rate by electrical control. The positive-pressure relief valve mechanism opens when the pressure at the fuel tank side has a value greater than or equal to a predetermined positive pressure value. The negative-pressure relief valve mechanism opens when the pressure at the fuel tank side has a value less than or equal to a predetermined negative pressure value. The electric-operated valve is configured such that the valve body is moved in the valve opening direction by the pressure at the fuel tank side that is higher, by a predetermined value, than the valve opening pressure for the positive-pressure relief valve mechanism.

An electronic controller of a valve actuator predictively calculates motor inputs that will cause the actuator to apply desired forces or torques to a valve. A force/torque sensor of the actuator measures applied force or torque at the motor output and/or valve to verify the applied force or torque and enable updating of calibration settings as needed. Upon failure of the force/torque sensor, embodiments continue predictive operation without sensor verification or calibration updates. Upon failure of the predictive control, embodiments continue valve actuation under reactive control via the force/torque sensor. Connection to a calibration valve simulator enables embodiments to perform an initial self-calibration using the force/torque sensor of the actuator. The motor can be a variable frequency driven AC motor or a DC motor. The calibration can incorporate mechanical properties of an actuator gear train.

A coupler that separates a unitary valve stem into two separate but coupled sections to isolates the thrust load from the torque load.