Flow controller

A preadjustable flow controller for a heating system comprising:

• a housing that has an inlet connection for a heating medium, an outlet connection for the heating medium, and a preadjustment connection;
• a rate regulating module, which depending on a preadjustment and a pressure difference changes a flow for the heating medium;
• and
• a handle that acts together with a movably disposed structural element of the rate regulating module to preadjust the flow,
• wherein, to change the preadjustment of the flow via the handle, an effective cross section of a first flow-through opening for the heating medium is adjusted, and
• wherein, to regulate the preadjusted flow of the heating medium, a sleeve of the rate regulating module and a cup of the rate regulating module, which are provided spring-loaded to one another via a bias spring, are disposed axially movable to one another and depending on an axial position, which varies with the pressure difference, a cross section of a second flow-through opening for the heating medium is changed, and
• wherein the inflow to the rate regulating module occurs on an outer side via the first flow-through opening, which is provided on the sleeve and is provided upstream of the second flow-through opening based on a flow direction of the heating medium.