A valve for switching fluids, in particular a sectional valve for an extinguishing agent line, with: - a control valve and - a working valve, which is designed for pilot control by the control valve, with: - a throttle bore that establishes a first fluid connection between an inlet of the valve to be pressurized and a piston chamber of the working valve, and - a working piston with a first end face opposite the piston chamber that is larger than a second end face opposite the inlet, wherein the control valve is configured to open and close a second fluid connection (22, 23) between the piston chamber and an outlet of the valve, wherein the control valve further has: - a control valve seat, - an anchor that closes the second fluid connection (22, 23) together with the control valve seat when pressed onto the control valve seat, - a magnetizable core and - a control coil configured to exert a magnetic force on the anchor, such that the control coil lifts the anchor from the control valve seat to an extent that the second fluid connection (22, 23) allows a greater flow than the first fluid connection, characterized in that the control valve has a) - a control spring (34, 34'), which presses the anchor onto the control valve seat, and against which the control coil lifts the anchor from the control valve seat, - a permanent magnet, which in an actuation state is configured to hold the anchor lifted from the control valve seat by means of the core, and - a magnet holder, in and/or on which the permanent magnet is held in the actuation state, and which permits a removal of the permanent magnet, and/or b) - a permanent magnet, which presses the anchor onto the control valve seat by means of the core, and against the retaining effect of which the control coil lifts the anchor from the control valve seat, - a control spring, which in an actuation state is configured to hold the anchor lifted off of the control valve seat, and - a magnet holder, in and/or on which the permanent magnet is held, and which allows a removal the permanent magnet for a transition into the actuation state, and characterized in that the control valve is configured to variably position the core along a force generated by the control spring (34, 34'). - a control valve and - a working valve, which is designed for pilot control by the control valve, with: - a throttle bore that establishes a first fluid connection between an inlet of the valve to be pressurized and a piston chamber of the working valve, and - a working piston with a first end face opposite the piston chamber that is larger than a second end face opposite the inlet, - a throttle bore that establishes a first fluid connection between an inlet of the valve to be pressurized and a piston chamber of the working valve, and - a working piston with a first end face opposite the piston chamber that is larger than a second end face opposite the inlet, - a control valve seat, - an anchor that closes the second fluid connection (22, 23) together with the control valve seat when pressed onto the control valve seat, - a magnetizable core and - a control coil configured to exert a magnetic force on the anchor, such that the control coil lifts the anchor from the control valve seat to an extent that the second fluid connection (22, 23) allows a greater flow than the first fluid connection, a) - a control spring (34, 34'), which presses the anchor onto the control valve seat, and against which the control coil lifts the anchor from the control valve seat, - a permanent magnet, which in an actuation state is configured to hold the anchor lifted from the control valve seat by means of the core, and - a magnet holder, in and/or on which the permanent magnet is held in the actuation state, and which permits a removal of the permanent magnet, and/or - a control spring (34, 34'), which presses the anchor onto the control valve seat, and against which the control coil lifts the anchor from the control valve seat, - a permanent magnet, which in an actuation state is configured to hold the anchor lifted from the control valve seat by means of the core, and - a magnet holder, in and/or on which the permanent magnet is held in the actuation state, and which permits a removal of the permanent magnet, and/or b) - a permanent magnet, which presses the anchor onto the control valve seat by means of the core, and against the retaining effect of which the control coil lifts the anchor from the control valve seat, - a control spring, which in an actuation state is configured to hold the anchor lifted off of the control valve seat, and - a magnet holder, in and/or on which the permanent magnet is held, and which allows a removal the permanent magnet for a transition into the actuation state, - a permanent magnet, which presses the anchor onto the control valve seat by means of the core, and against the retaining effect of which the control coil lifts the anchor from the control valve seat, - a control spring, which in an actuation state is configured to hold the anchor lifted off of the control valve seat, and - a magnet holder, in and/or on which the permanent magnet is held, and which allows a removal the permanent magnet for a transition into the actuation state,