Abstract: A layer-sintered valve seat ring is disclosed. The layer-sintered valve seat ring includes at least two materials including a function material for a tribological contact with an opposite runner and a support material for the function material. The support material includes: C: 0.5 to 1.8% by weight; Cr: 3 to 16% by weight; Mo: 1 to 5% by weight; W: 0.5 to 5.5% by weight; V: 0.4 to 4.0% by weight; Cu: 12 to 25% by weight; Fe: 41.3 to 82.6% by weight; Mn: up to 0.6% by weight; Si: up to 1.8% by weight; and a remainder of production-related contamination in the form of at least one of Ni, Co, Ca, P, and S that are present in contents of <0.3% by weight each.

Abstract: An actuator (4), having a communication unit (7) to set up a first radio link (6) to receive and transmit messages, and having a processing unit (9) to process messages. The actuator (4) is configured to process received messages in the processing unit (9) and to forward them via a second radio link (6). The actuator (4) is incorporated as a network node into a mesh network (1) and an optimum transmission path (32) between the network nodes is first determined for the transmission of messages.

Abstract: A system (1) including a control center (3) and at least one actuator (2) with a communication unit (5) which is designed to communicate with the control center (3) via at least one radio link (6) in the sub-GHz range.

Abstract: An actuator (4), having a communication unit (7) to set up a first radio link (6) to receive and transmit messages, and having a processing unit (9) to process messages. The actuator (4) is configured to process received messages in the processing unit (9) and to forward them via a second radio link (6). The actuator (4) is incorporated as a network node into a mesh network (1) and an optimum transmission path (32) between the network nodes is first determined for the transmission of messages.