Rotary slide valve for regulating a flow of fluid, and method for producing a rotary slide valve

A method for producing a rotary slide valve for controlling a fluid flow, the rotary slide valve comprising a rotary slide (02) which is mounted in a valve housing in such a manner that it can rotate about an axis of rotation (R), the method comprising the following steps:

• producing the rotary slide (02) in an injection molding process, a metal casting process or a metal sintering process;
• producing at least a circumferential or barrel portion (04) of the valve housing (03) in an injection molding process, metal casting process or a metal sintering process;
• assembling the rotary slide (02) and the valve housing (03);
• wherein
• a gap is formed in the radial direction between the rotary slide (02) and the immediately adjacent circumferential or barrel portion (04) of the valve housing (03), the gap allowing the rotary slide (02) to rotate about the axis of rotation (R) and enabling a sealing which does not exceed a tolerable leakage between the rotary slide (02) and the circumferential or barrel portion (04) of the valve housing (03), wherein the rotary slide (02) is reworked to obtain defined outer diameters in relation to the axis of rotation (R), wherein the reworking of the rotary slide (02) comprises a grinding process for adjusting a radial outer diameter and wherein the grinding process is carried out in such a cascaded manner that multiple rotary slides (02) are partially plugged into one another in an axial direction and form a rotary slide group (11), the radial surface (81) of the rotary slide group (11) being essentially formed by the surfaces (08) to be machined or ground.