A valve having a balancing function for a fluid distribution system. A valve closing member is movable between a closed position and a fully opened position. An actuation device is provided for changing the position of the valve closing member. A control unit is provided and includes an electronic memory adapted to receive and store an opening limitation value, the opening limitation value being representative of a selected intermediate position between the closed position and the fully opened position of the valve closing member, wherein the control unit controls the actuation device to limit the movement of the valve closing member to positions from the closed position to the selected intermediate position. Also, a valve system and to a method of operating a valve.

A valve having a balancing function for a fluid distribution system. A valve closing member is movable between a closed position and a fully opened position. An actuation device is provided for changing the position of the valve closing member. A control unit is provided and includes an electronic memory adapted to receive and store an opening limitation value, the opening limitation value being representative of a selected intermediate position between the closed position and the fully opened position of the valve closing member, wherein the control unit controls the actuation device to limit the movement of the valve closing member to positions from the closed position to the selected intermediate position. Also, a valve system and to a method of operating a valve.

Disclosed herein are methods for obtaining aza-pyridone compounds, which can be useful for ameliorating and/or treating a disease and/or a condition, including an orthomyxovirus infection.

Disclosed herein are methods for obtaining aza-pyridone compounds, which can be useful for ameliorating and/or treating a disease and/or a condition, including an orthomyxovirus infection.

A method for preparing a partially fluorinated alcohol, comprises reacting an epoxide: wherein R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are independently selected from the group comprising H, F, Cl, Br, I, CF.sub.3, alkyl, fluoroalkyl, haloalkyl with a fluorinating agent.

A method for preparing a tetrafluoro-1,2-epoxypropane comprising reacting a 3-acetoxy-2-bromo-tetrafluoropropane with an alkaline or alkaline earth metal hydroxide solution to provide a tetrafluoro-1,2-epoxypropane, and partially fluorinated polyethers of formula [OCRR.sub.1CR.sub.2R.sub.3].sub.n wherein n is from 5 to 100, R is F or H, R.sub.1 is CF.sub.3, R.sub.2 is F or H and R.sub.3 is H.

A method for preparing a tetrafluoro-1,2-epoxypropane comprising reacting a 3-acetoxy-2-bromo-tetrafluoropropane with an alkaline or alkaline earth metal hydroxide solution to provide a tetrafluoro-1,2-epoxypropane, and partially fluorinated polyethers of formula [OCRR.sub.1CR.sub.2R.sub.3].sub.n wherein n is from 5 to 100, R is F or H, R.sub.1 is CF.sub.3, R.sub.2 is F or H and R.sub.3 is H.

A method for preparing a tetrafluoro-1,2-epoxypropane comprising reacting a 3-acetoxy-2-bromo-tetrafluoropropane with an alkaline or alkaline earth metal hydroxide solution to provide a tetrafluoro-1,2-epoxypropane, and partially fluorinated polyethers of formula [OCRR.sub.1CR.sub.2R.sub.3].sub.n wherein n is from 5 to 100, R is F or H, R.sub.1 is CF.sub.3, R.sub.2 is F or H and R.sub.3 is H.

A method for preparing a tetrafluoro-1,2-epoxypropane comprising reacting a 3-acetoxy-2-bromo-tetrafluoropropane with an alkaline or alkaline earth metal hydroxide solution to provide a tetrafluoro-1,2-epoxypropane, and partially fluorinated polyethers of formula [OCRR.sub.1CR.sub.2R.sub.3].sub.n wherein n is from 5 to 100, R is F or H, R.sub.1 is CF.sub.3, R.sub.2 is F or H and R.sub.3 is H.

A method for preparing atetrafluoro-1,2-epoxypropane comprising reacting a 2-bromo-tetrafluoropropan-3-ol with an alkaline or alkaline earth metal hydroxide solution, a compound which is 2,3,3,3-tetrafluoro-1,2-epoxypropane, and partially fluorinated polyethers of formula [OCRR.sub.1CR.sub.2R.sub.3].sub.n wherein n is from 5 to 100, R is F or H, R.sub.1 is CF.sub.3, R.sub.2 is F or H and R.sub.3 is H.