A volume flow regulating valve, comprising:
- a cylinder having a cavity;
- a dumbbell-shaped double piston guided in the cavity of the cylinder, the double piston having a first piston and a second piston, the pistons being fixedly connected together by a narrowed center member, wherein a central pressure chamber is formed in the cavity in a region of the narrowed center member, each piston having an end face remote from the narrow center member;
- a first peripheral pressure chamber and a second peripheral pressure chamber in the cylinder, the first peripheral chamber being bounded by the end face of the first piston and the second peripheral chamber being bounded by the end face of the second piston;
- and
- a feed channel and a first drain channel in the cylinder respectively for feeding a fluid medium to and draining the fluid medium from the central chamber;
- a second drain channel in the cylinder for draining the fluid medium from the central pressure chamber, wherein
- the first drain channel and the second drain channel are arranged at the cylinder with an axial spacing so that when the double piston is disposed in a center setting with respect to the two drain channels the first drain channel and the second drain channel respectively free an equal opening cross-section area;
- a first pressure channel provided to supply a static pressure in the first drain channel to the second peripheral pressure chamber, wherein the first pressure channel has an end at an opening in a wall of the first drain channel so as to detect the static pressure in the first drain channel;
- a second pressure channel provided to supply a static pressure in the second drain channel to the first peripheral pressure chamber, wherein the second pressure channel has an end at an opening in a wall of the second drain channel so as to detect the static pressure in the second drain channel;
- a first pitot tube arranged in the first drain channel so that the fluid medium flows into the first pitot tube and the first pitot tube detects total pressure in the first drain channel;
- a second pitot tube arranged in the second drain channel so that the fluid medium flows into the second pitot tube and the second pitot tube detects total pressure in the second drain channel;
- a first plunger mounted in the first peripheral pressure chamber to be axially displaceable for action on the end face of the first piston, wherein the first plunger is loaded by the total pressure in the first drain channel;
- and
- a second plunger mounted in the second peripheral pressure chamber to be axially displaceable for action on the end face of the second piston, wherein the second plunger is loaded by the total pressure in the second drain channel.