Device for regulating the pressure and/or mass flow for a space propulsion system

A device for regulating at least one of the pressure and mass flow of a gaseous or liquid fluid conveyable through a line of a space propulsion system, the device comprising:

• a first, piezoelectrically actuatable regulating valve;
• and
• at least two second, magnetically actuatable regulating valves,
• wherein the combination of the first, piezoelectrically actuatable regulating valve and the at least two second, magnetically actuatable regulating valves are configurable to regulate at least one of the pressure and mass flow of the fluid,
• wherein the first, piezoelectrically actuatable regulating valve and the at least two second, magnetically actuatable regulating valves are connected to each other and to a line input in such a way that in a nominal mode the pressure or the mass flow of the fluid is settable by the first, piezoelectrically actuatable regulating valve, and a connection or isolation of the first, piezoelectrically actuatable regulating valve with or from the line input is produced by the at least two second, magnetically actuatable regulating valves, and wherein in an emergency mode the first, piezoelectrically actuatable regulating valve is isolated from the line input such that the pressure or the mass flow of the fluid is settable by only the at least two second, magnetically actuatable regulating valves,
• wherein the emergency mode corresponds to a malfunction of the first, piezoelectrically actuatable regulating valve.