Abstract: A refrigerant valve arrangement is described, having a housing which has a first functional space, in which there is arranged at least one functional element, which co-operates with a first annular contact surface formed in an internal boundary wall. It is desirable to be able to match a refrigerant valve arrangement to different functions with little outlay. For that purpose there is provided, arranged on that side of the boundary wall which is located opposite the first functional space, a second functional space, in which a second functional element can be positioned and which has a second annular contact surface, a channel which passes through the boundary wall opening out in both contact surfaces.

Abstract: The invention concerns a fail-safe valve having a valve element, and a control motor being connected with the valve element via a driveline. It is endeavored to ensure the tightness of the refrigeration system in a simple manner. For this purpose, it is ensured that the valve element is located inside and the control motor outside a closed valve housing, that the drive line has a magnetic coupling, which acts through the housing, and that the valve element is pressure-released. In addition, a resetting device is provided that causes the valve element to be returned to a predetermined position upon the undesired cessation of control motor operation.

Abstract: A refrigerant valve arrangement is described, having a housing which has a first functional space, in which there is arranged at least one functional element, which co-operates with a first annular contact surface formed in an internal boundary wall. It is desirable to be able to match a refrigerant valve arrangement to different functions with little outlay. For that purpose there is provided, arranged on that side of the boundary wall which is located opposite the first functional space, a second functional space, in which a second functional element can be positioned and which has a second annular contact surface, a channel which passes through the boundary wall opening out in both contact surfaces.

Abstract: The invention concerns a fail-safe valve having a valve element, and a control motor being connected with the valve element via a driveline. It is endeavoured to ensure the tightness of the refrigeration system in a simple manner. For this purpose, it is ensured that the valve element is located inside and the control motor outside a closed valve housing, that the drive line has a magnetic coupling, which acts through the housing, and that the valve element is pressure-released. In addition, a resetting device is provided that causes the valve element to be returned to a predetermined position upon the undesired cessation of control motor operation.