The invention relates to a
thermostat mixing valve for sanitary installations, with an axially displaceable top piece incorporating a cone by means of a rotatably mounted stem and a
bushing with windows for hot and cold
water entry, through A spring-loaded slider can be moved axially in the penetration sleeve, the slider is connected to a
thermocouple with an adjusting
piston, wherein the entry of hot and cold water through the window can be adjusted according to the movement of the slider, wherein the cone The body (5) comprises a
bushing (51) which is closed by the bottom on its underside facing away from the mandrel (2) and in which a conical
piston (53) is axially displaceable, The conical
piston is preloaded towards the bottom by a spring (54). In the bottom there is a connecting channel axially aligned with the conical piston (53), which is simultaneously axially aligned with the regulating piston (81) of the
thermocouple, and the conical piston (53) and / or
thermocouple The adjusting piston (81) of the couple (8) can move into this connecting channel, and on the high position (hot water position) of the slider (7), the adjusting piston (81) abuts against the conical piston (53) and the bottom is in contact with the slider The block (7) is spaced, while in the low position (cold water position) of the slide (7) the adjusting piston (81) is spaced from the conical piston (53) and the bottom abuts against the slide (7).