Pressure-limiting valve

A pressure-limiting valve, comprising:

• a housing defining a first piston chamber, a second piston chamber, a first receptacle, and a second receptacle;
• a first spring-loaded closing element at least partially located in the first receptacle;
• a second spring-loaded closing element at least partially located in the second receptacle;
• a first valve seat formed in the housing and configured to be closed by the first spring-loaded closing element;
• a second valve seat formed in the housing and configured to be closed by the second spring-loaded closing element;
• a first guide piston extending directly from the first spring-loaded closing element and located in the first piston chamber, the first guide piston including a first terminal end surface of the first spring-loaded closing element located in the first piston chamber;
• a second guide piston extending directly from the second spring-loaded closing element, the second guide piston including a second terminal end surface of the second spring-loaded closing element located in the second piston chamber,
• wherein (i) the first receptacle, the first spring-loaded closing element, the first piston chamber, and the first guide piston;
• and (ii) the second receptacle, the second spring-loaded closing element, the second piston chamber, and the second guide piston are configured substantially mirror-symmetrically with respect to one another in the housing,
• wherein the first piston chamber is a blind hole,
• wherein the second piston chamber is another blind hole,
• wherein a line of symmetry extends directly between the first piston chamber and the second piston chamber,
• wherein the housing, the first valve seat, and the second valve seat are composed of cast iron with spheroidal graphite, and
• wherein at least the first valve seat and the second valve seat are surface-hardened.