A double seat value with a drive for switching the valve, with two closing elements (3, 4) that are movable independently of each other, which include between themselves a leakage hollow space, which is connected with the surrounding area of the double seat valve, wherein the first closing element comes into contact on the second closing element after a partial stroke and also transfers it in the case of its further opening movement to an open position, with adjusting rods (3a, 4a) arranged in each other concentrically for the closing elements (3, 4), which are guided out of a valve housing outwards and into the drive and via which the closing elements (3, 4), in addition to the open position and independently of each other, can each be brought optionally into a partially open position (T1, T2), wherein the open position is generated by a main adjusting apparatus and the partially open positions (T1, T2) are generated by the individual adjusting apparatuses (300, 400) assigned to the respective closing elements (3, 4) and the individual adjusting apparatuses (300, 400) are arranged on one hand between the main adjusting apparatus and the valve housing and on the other hand together with the main adjusting apparatus in a common housing of the drive, with a first drive piston of the main adjusting apparatus, which engages in the direction of the assigned open position at the first adjusting rod for the first closing element against the force of a first spring, and with a third drive piston of the second individual adjusting apparatus for the second closing element, which can be brought to engage in a driving connection with the second adjusting rod of the second closing element in the direction of the assigned second partially open position, wherein the first drive piston delimits on its side facing the valve housing a first pressure medium chamber for generating the open position and a third pressure medium chamber is provided on the side of the third drive piston facing away from the first pressure medium chamber for generating the second partially open position, and wherein the first drive piston is securely connected either directly or indirectly to the first adjusting rod, characterized in that • the first pressure medium chamber delimited on the one side by the first drive piston is delimited on the other side by a housing floor spanning the housing transversely to the longitudinal axis of the drive, • the drive has a fourth pressure medium chamber for generating the first partially open position in the case of a design of the double seat valve with a first closing element designed as a slide piston and a second closing element designed as a seat plate on the side of the first drive piston facing away from the valve housing, wherein the first drive piston is axially movable out of the closed position of the double seat valve within the framework of the first individual adjusting apparatus for the first closing element around the first partially open position opposite the direction of the open position, and • the drive has a second drive piston in the case of a design of the double seat valve with two closing elements (3, 4) designed as seatplates in the housing floor on the side of the first drive piston, which is axially movable such that it forms with the housing floor a second pressure medium chamber of the first individual adjusting apparatus for the first closing element for generating the first partially open position, wherein the second drive piston can be brought to engage in a driving connection with the first drive piston around the first partial stroke in the direction of the open position. • the first pressure medium chamber delimited on the one side by the first drive piston is delimited on the other side by a housing floor spanning the housing transversely to the longitudinal axis of the drive, • the drive has a fourth pressure medium chamber for generating the first partially open position in the case of a design of the double seat valve with a first closing element designed as a slide piston and a second closing element designed as a seat plate on the side of the first drive piston facing away from the valve housing, wherein the first drive piston is axially movable out of the closed position of the double seat valve within the framework of the first individual adjusting apparatus for the first closing element around the first partially open position opposite the direction of the open position, and • the drive has a second drive piston in the case of a design of the double seat valve with two closing elements (3, 4) designed as seatplates in the housing floor on the side of the first drive piston, which is axially movable such that it forms with the housing floor a second pressure medium chamber of the first individual adjusting apparatus for the first closing element for generating the first partially open position, wherein the second drive piston can be brought to engage in a driving connection with the first drive piston around the first partial stroke in the direction of the open position.