Abstract: A double seat valve for separating media includes a housing having a first connector for a first pipeline and a second connector for a second pipeline, a first closing member of the first connector and a first closing member seat assigned thereto, the first closing member in closed position cooperating in sealing manner with the first closing member seat via at least one sealing element, a second closing member of the second connector axially spaced from the first closing member, and a second closing member seat assigned to the second closing member, the second closing member in closed position cooperating in sealing manner with the second closing member seat via at least one sealing element. The two closing members can be lifted independently of one another from their respective closing member seats. A leakage space is also provided between the two closing members and discharges into a leakage outlet.

Abstract: A double seat valve for separating media includes a housing having a first connector for a first pipeline and a second connector for a second pipeline, a first closing member of the first connector and a first closing member seat assigned thereto, the first closing member in closed position cooperating in sealing manner with the first closing member seat via at least one sealing element, a second closing member of the second connector axially spaced from the first closing member, and a second closing member seat assigned to the second closing member, the second closing member in closed position cooperating in sealing manner with the second closing member seat via at least one sealing element. The two closing members can be lifted independently of one another from their respective closing member seats. A leakage space is also provided between the two closing members and discharges into a leakage outlet.

Abstract: A ring seal for a closing element of a valve, in particular of a valve of a process engineering installation, a seal arrangement including the ring seal, and a valve including the seal arrangement. The ring seal has a ring body defining a longitudinal axis perpendicular to the plane of the ring body; a seal surface on a radially outer surface in relation to the longitudinal axis; and two substantially radially directed leg portions spaced apart from one another in the direction of the longitudinal axis. The two leg portions are connected to one another by a bridge portion extending in the direction of the longitudinal axis, on the radially outer surface of which bridge portion the sealing surface is provided; and, a radially inner surface of the bridge portion is spaced apart in the radial direction from ends of the leg portions which are remote from the sealing surface.