A condensate trap comprising a housing (4) with a condensate inlet (1) at the top.

A condensate off-take has an inlet (7) for a vapour-condensate mixture, and outlet (9) for condensate and an inner valve point (15) connected to the outlet (9).

Those compressors are connected on the outlet side by a conduit and a heat-exchanger to a condensate discharger.

Other components may also be incorporated into the assembly including a filter module (874), a flow meter and a condensate trap (864).

The condensate drain has at least one battery (33), which provides the power supply for at least the control unit (27), the filling level gauge (26) and the valve (24).

Steam rises from the supply side of the radiator (the radiator steam supply valve is on this side) and pushes air and condensate out through the return or condensate drain side of the radiator.

A condensate trap is provided with a liquid supply hole (1) and a liquid discharge hole (9), as well as a vapour discharge hole (6) located in the upper side of the casing (2).

The condensation trap can also be operated with optimal efficiency, such that an embodiment of the condensation trap with comparatively small capacity is possible.