The invention concerns a nozzle support device (10) comprising a body (12) that has a fluid inlet passage (24) and at least one outlet passage (26), and that comprises a revolving section that forms a hub (16) that extends around a rotational axis (A), a nozzle-carrying head (14) that is rotatably mounted on the hub (16) of the body (12) around the rotational axis (A), and that is designed to simultaneously carry at least two nozzles, and immobilising means (74, 86) for immobilising the nozzle-carrying head (14) in rotation on the body (12) in a plurality of predefined positions, characterised in that the device (10) is provided with a mechanism for rotating the nozzle-carrying head (14) comprising an oscillating drive member (90) provided with at least one retractable drive pawl that has one free end designed to push the drive teeth in succession.

A vacuum-based energy-saving large-capacity precision pressure regulation valve includes a base valve seat, a middle valve seat, and a pressure regulation seat. The base valve seat includes a main channel that receives a primary-side pressure and a secondary-side pressure to flow therein and includes a valve port piston arranged in the base valve seat to form a valve port opening. The valve port piston is rotatably coupled to a sealing straight rod that is coupled to a main diaphragm. The main diaphragm is clamped between the middle valve seat and the base valve seat to form a vacuum pressure chamber. A balance diaphragm is clamped between the middle valve seat and the pressure regulation seat. An atmosphere passage is connected to a space below the balance diaphragm. A guide passage and a feedback passage are in communication with the vacuum pressure chamber and the main channel.

Adjustment of loop-powered pneumatic process control device interfaces is disclosed. A disclosed example interface for use with a pneumatic process control device includes a power input to scavenge power from a loop power control signal associated with the process control system, a movement controller to cause movement of an actuator powered by the loop power, where the actuator is operatively coupled to a movable control input associated with the process control device, and a calibrator to read position feedback of the actuator during the movement to calculate a positional error, where the calibrator is to adjust a set point of the loop power control signal based on the positional error to control the actuator.

Adjustment of loop-powered pneumatic process control device interfaces is disclosed. A disclosed example interface for use with a pneumatic process control device includes a power input to scavenge power from a loop power control signal associated with the process control system, a movement controller to cause movement of an actuator powered by the loop power, where the actuator is operatively coupled to a movable control input associated with the process control device, and a calibrator to read position feedback of the actuator during the movement to calculate a positional error, where the calibrator is to adjust a set point of the loop power control signal based on the positional error to control the actuator.

A force measurement device for a fluid control valve is disclosed, in which a force measurement device is coupled between a driving axle of a driver device and a valve rod of a fluid control valve. The force measurement device includes a sensor seat, which is coupled between the driving axle of the driver device and the valve rod of the fluid control valve. A plurality of stress detection units are arranged and positioned on the sensor seat in an annular configuration and are spaced from each other by an angle. The plurality of stress detection units are operable to measure a magnitude of a force applied to the valve rod according to deformation of the sensor seat and generates a plurality of stress variation signals that are transmitted to a control device.

A valve arrangement for regulated provision of a fluid relies upon a pilot control unit. The pilot control unit includes at least one electrically controlled pilot control valve and one regulating unit coupled to the pilot control unit. The regulating unit is designed for the adaptive, parameter-based regulation of the at least one pilot control valve. The regulation is based on a combined parameter which describes an opening point of the at least one pilot control valve. A determination of the combined parameter is made based on a static component and a dynamic component.

A regulator for establishing outlet fluid pressure. The regulator includes a valve body having a fluid pressure inlet in selective fluid communication with a fluid pressure outlet. A pilot pressure inlet is formed in the valve body and in fluid communication with a source of pilot pressure. Valving structure in the valve body establishes outlet fluid pressure as a function of pilot pressure. First adjustable structure within the valve body may establish a minimum outlet fluid pressure threshold without regard to pilot pressure. Second adjustable structure within the valve body may establish outlet fluid pressure offset relative to pilot pressure.

A hermetically sealed fuel tank system includes a hermetically sealed fuel tank, a fuel pump configured to supply fuel from within the hermetically sealed fuel tank to an internal combustion engine, and a pressure regulating valve. The pressure regulating valve is disposed within the hermetically sealed fuel tank and is configured to regulate the fuel pressure of the fuel supplied from the fuel pump to the internal combustion engine. The pressure regulating valve includes a pressure regulating chamber and a backpressure chamber partitioned by a diaphragm. An ambient air introduction passage is fluidly connected to the backpressure chamber and is configured to introduce air from the atmosphere outside the fuel tank into the backpressure chamber.

A flow control device includes a housing with an inlet and an outlet and a flow conduit disposed in the housing. The inlet, the flow conduit, and the outlet define a flow passage. A valve seat is disposed in the housing downstream of the inlet, and a shuttle is movably disposed in the housing and displaceable between a closed position engaging the valve seat to close the flow passage and an open position spaced from the valve seat to open the flow passage. A sealed chamber is defined between the housing and the flow conduit. A port coupled with a source of pressurized fluid communicates with the sealed chamber, where the shuttle is displaceable between the closed position and the open position based on a pressure in the sealed chamber. The threshold water pressure for displacing the flow conduit may be adjustable by modifying the pressure in the sealed chamber.

A vacuum-based energy-saving large-capacity precision pressure regulation valve includes a base valve seat, a middle valve seat, and a pressure regulation seat. The base valve seat includes a main channel that receives a primary-side pressure and a secondary-side pressure to flow therein and includes a valve port piston arranged in the base valve seat to form a valve port opening. The valve port piston is rotatably coupled to a sealing straight rod that is coupled to a main diaphragm. The main diaphragm is clamped between the middle valve seat and the base valve seat to form a vacuum pressure chamber. A balance diaphragm is clamped between the middle valve seat and the pressure regulation seat. An atmosphere passage is connected to a space below the balance diaphragm. A guide passage and a feedback passage are in communication with the vacuum pressure chamber and the main channel.