Drain system and condensate valve

It is stated at least one oil / water separator to a compressor with a flow-through from the condensate valve condensate a condensate drain system. The condensate valve is actuated via a solenoid valve to open and close. The output of the condensate valve opens into a drip container. The flow-through from the condensate condensate valve is designed such that it also forms a pressure reducer for reducing the pressure of the outflowing condensate, and on the output side a direct derivation allowed to drip container. Further, a condensate valve is provided which comprises a movable piston which can be pressed against the input side, a small diameter opening of a valve seat is closed by means of the solenoid valve condensate valve. On the output side of the piston has a large-diameter piston surface or a large piston cross-sectional area which is acted upon by the open, by means of the solenoid valve via an overflow valve condensate through the condensate. The overflow pipe may be formed of at least one axially extending through the piston passageway.