Thermostatic valve having a sleeve

A thermostatic valve, comprising:

• a housing, wherein first and second chambers are arranged inside the housing, the first chamber is configured to be directly connected to the second chamber so that a fluid flows inside the housing, and the first and second chambers are each configured to be connected directly to an outside of the housing so that a fluid enters the housing and/or leaves the housing via the respective chamber,
• a plug seat fixedly supported by the housing;
• a first sleeve seat fixedly supported by the housing and distinct from the plug seat;
• a thermostatic element comprising a fixed part secured to the housing, and a movable part configured to move along an axis relative to the fixed part, the movable part axially moving away from the fixed part under an action of an expansion of a thermally expandable material of the thermostatic element;
• a plug configured to move along the axis relative to the housing in order to change between a closed configuration wherein the plug is axially pressed against the plug seat to prevent the fluid from flowing between the first and second chambers by passing through the plug seat, and an open configuration wherein the plug is moved away from the plug seat to let the fluid flow between the first and second chambers by passing through the plug seat;
• and
• a sleeve configured to move along the axis relative to the housing to change between a first configuration wherein the sleeve is pressed axially against the first sleeve seat to prevent the fluid from flowing between the first and second chambers by passing through the first sleeve seat, and a second configuration wherein the sleeve is moved away from the first sleeve seat to let the fluid flow between the first and second chambers by passing through the first sleeve seat,
• wherein the plug is connected to the movable part of the thermostatic element and to the sleeve so that during the expansion of the thermally expandable material:
• the movable part drives the plug along the axis with respect to the housing from the closed configuration to the open configuration, until the plug occupies a predetermined intermediate position, while the sleeve remains in the first configuration thereof, then
• the movable part drives the plug in the open configuration along the axis with respect to the housing beyond the predetermined intermediate position, while the plug drives the sleeve along the axis with respect to the housing from the first configuration to the second configuration.