Valve

The invention relates to a valve comprising a valve housing (12) through which a process medium can flow and in which a valve seat (17) that surrounds a through-flow opening (16) is arranged, wherein a valve element (18) which is arranged on a spindle (19) is paired with the valve seat such that the valve element (18) can be moved between a blocking position in which the valve element (18) sits against the valve seat (17) in a fluid-tight manner and an open position in which the valve element (18) is lifted from the valve seat (17) by means of an adjusting stroke of the spindle (19), and an interface (28) for coupling a drive unit which generates the adjusting stroke of the spindle (19) is arranged on the valve housing (12). A sealing device (38) through which the spindle (19) extends is received in the valve housing (12), said sealing device having a seal arrangement (39) which is biased by means of spring means and which comprises sealing means that sealingly rest against the spindle (19). The sealing devic