The actuator Schlüter-BEKOTEC-THERM-ESA regulates the flow at cold leg valves. It is threaded onto the cold leg valves of the Schlüter heating circuit distributors Schlüter-BEKOTEC-THERM-HVT/DE or Schlüter-BEKOTEC-THERM-HVP. For convenience, the units include a visual function display and a valve adaptation control.

The valve is supplied in open condition (first-open function) and is manually adjustable in operation (re-open function). The valve is closed when there is no electricity.