An oil control valve for a cam phaser of an internal combustion engine where the spool is positioned by an external actuator. The valve includes a spool assembly including a spool that is axially movable in a central opening, and there is at least one groove in the spool. The groove substantially increases fluid flow through the hydraulic valve when opened. By controlling the size and position of the groove, the amount of the fluid flow may be controlled. Further fluid flow control may be had by controlling the size of holes in the spool. The increase of fluid flow attributable to the groove may be at least 50%, 100% or even 200% compared with the at least one groove being absent.

An oil control valve for a cam phaser of an internal combustion engine where the spool is positioned by an external actuator. The valve includes a spool assembly including a spool that is axially movable in a central opening, and there is at least one groove in the spool. The groove substantially increases fluid flow through the hydraulic valve when opened. By controlling the size and position of the groove, the amount of the fluid flow may be controlled. Further fluid flow control may be had by controlling the size of holes in the spool. The increase of fluid flow attributable to the groove may be at least 50%, 100% or even 200% compared with the at least one groove being absent.

Apparatuses for controlling gas flow are important components for delivering process gases for semiconductor fabrication. In one embodiment, a gas flow control system for achieving improved transient response in apparatuses for controlling gas flow is disclosed. Specifically, by providing a command to an apparatus to deliver a predetermined mass flow rate at a future turn on time, the apparatus is able to pre-pressurize a P1 volume so that the response time of the apparatus is no longer dependent on the speed of the apparatus's control valves and the limitations of the control loop.

Apparatuses for controlling gas flow are important components for delivering process gases for semiconductor fabrication. In one embodiment, a gas flow control system for achieving improved transient response in apparatuses for controlling gas flow is disclosed. Specifically, by providing a command to an apparatus to deliver a predetermined mass flow rate at a future turn on time, the apparatus is able to pre-pressurize a P1 volume so that the response time of the apparatus is no longer dependent on the speed of the apparatus's control valves and the limitations of the control loop.

A valve for controlling fluid flow. The valve includes a valve body, a chamber arranged inside of the valve body, a fluid inlet for providing fluid to the chamber, and a fluid outlet for receiving fluid from the chamber. The valve further includes a closing arrangement for controlling the flow of fluid from the fluid inlet to the fluid outlet via the chamber, and a differential pressure sensor for measuring the differential pressure over the closing arrangement, between an upstream pressure and a downstream pressure. The differential pressure sensor is integrated in the valve body, and is arranged to measure the differential pressure for at least an open state of the closing arrangement.

A front pull piercing valve assembly attached to a flexible container, whereby; when the wall of the flexible container is pulled into contact with a piercing element in the assembly, the contents of the container are dispensed by piercing the wall of the container and liquid flows through the valve assembly and directly into a container or through flexible hose or another connection to be dispensed. The valve assembly is configured in such a manner that during use it is filed with the liquid being dispensed thereby preventing the liquid in the flexible container from being exposed to air, namely, oxygen that often causes spoilage of certain liquids, such as wine.

A front pull piercing valve assembly attached to a flexible container, whereby; when the wall of the flexible container is pulled into contact with a piercing element in the assembly, the contents of the container are dispensed by piercing the wall of the container and liquid flows through the valve assembly and directly into a container or through flexible hose or another connection to be dispensed. The valve assembly is configured in such a manner that during use it is filed with the liquid being dispensed thereby preventing the liquid in the flexible container from being exposed to air, namely, oxygen that often causes spoilage of certain liquids, such as wine.

In controlling pressure in an aircraft cabin, during flight operation, an effective flow cross-sectional area of at least one outflow valve is controlled to adjust air flow exiting the cabin through the outflow valve so pressure within the cabin is controlled according to a predetermined cabin pressure control strategy. During flight operation of the aircraft, an effective flow cross-sectional area of at least one negative relief valve is controlled to adjust air flow entering the cabin through the negative relief valve so a negative differential pressure between the pressure within the aircraft cabin and an ambient pressure prevailing outside of the aircraft cabin is prevented from exceeding a predetermined threshold value. During ground operation of the aircraft, the effective flow cross-sectional area of the at least one negative relief valve is controlled to allow an equalization between pressure within the cabin and ambient pressure prevailing outside of the aircraft.

In controlling pressure in an aircraft cabin, during flight operation, an effective flow cross-sectional area of at least one outflow valve is controlled to adjust air flow exiting the cabin through the outflow valve so pressure within the cabin is controlled according to a predetermined cabin pressure control strategy. During flight operation of the aircraft, an effective flow cross-sectional area of at least one negative relief valve is controlled to adjust air flow entering the cabin through the negative relief valve so a negative differential pressure between the pressure within the aircraft cabin and an ambient pressure prevailing outside of the aircraft cabin is prevented from exceeding a predetermined threshold value. During ground operation of the aircraft, the effective flow cross-sectional area of the at least one negative relief valve is controlled to allow an equalization between pressure within the cabin and ambient pressure prevailing outside of the aircraft.