Abstract: The invention relates to a valve for actuating a flow channel (12), having a valve housing (16) disposed in the flow channel (12) with a throttle body (28) for forming a throttle point (14), and having a bypass valve (11) disposed in the flow channel (12) that can be actuated dependent on the temperature of the fluid, forming a bypass passage (30) together with at least one bypass opening (32), wherein a continuous change in the cross section of the bypass passage (30) of the bypass valve (31) can be actuated dependent on the temperature-based changes in viscosity of the fluid.

Abstract: The invention relates to a valve arrangement for an expansion valve, especially for cooling units in vehicle air conditioning systems, having a valve seat for receiving a valve-closing member, which, in a closing position, fits snugly in the valve seat and closes a passage between a coolant inlet side and a coolant outlet side, the valve seat or the valve-closing member having at least two zones, a first zone forming with the valve-closing member or with the valve seat, in a closing position, a sealing seat, and at least one further zone regulating a coolant mass flow flowing through the passage, and a gradient of the sealing-seat-forming zone differing from a gradient of the at least one further zone.

Abstract: The invention relates to a shut-off valve for an expansion valve (11) in refrigerating systems, in particular vehicle air conditioning systems, having a regulating screw (31), having a receiving section (32), which is arranged at one end of the regulating screw (31) and is intended for the fitting of a travel-generating device (33) which actuates a valve (47) arranged in the regulating screw (31) and opens and closes a first passage opening (53) between an inlet (61) and an outlet (63) of the regulating screw (33), and having a regulating space (76) which is connected downstream of the valve (47) in the direction of flow of a refrigerant and is designed for receiving at least one regulating device (78).

Abstract: The invention relates to a valve arrangement for an expansion valve, especially for cooling units in vehicle air conditioning systems, having a valve seat for receiving a valve-closing member, which, in a closing position, fits snugly in the valve seat and closes a passage between a coolant inlet side and a coolant outlet side, the valve seat or the valve-closing member having at least two zones, a first zone forming with the valve-closing member or with the valve seat, in a closing position, a sealing seat, and at least one further zone regulating a coolant mass flow flowing through the passage, and a gradient of the sealing-seat-forming zone differing from a gradient of the at least one further zone.

Abstract: The invention relates to a shut-off valve for an expansion valve (11) in refrigerating systems, in particular vehicle air conditioning systems, having a regulating screw (31), having a receiving section (32), which is arranged at one end of the regulating screw (31) and is intended for the fitting of a travel-generating device (33) which actuates a valve (47) arranged in the regulating screw (31) and opens and closes a first passage opening (53) between an inlet (61) and an outlet (63) of the regulating screw (33), and having a regulating space (76) which is connected downstream of the valve (47) in the direction of flow of a refrigerant and is designed for receiving at least one regulating device (78).