The counter ring K 73126 is a precision-machined sealing and wear component used in the raw water pump of the Sulzer ZV40/48 engine. Positioned opposite rotating sealing elements, it provides a stable contact surface that ensures effective sealing and controlled friction during pump operation. Designed to operate in environments exposed to water, pressure fluctuations, and mechanical loads, this counter ring resists corrosion and wear while maintaining dimensional accuracy. Its function is essential for preventing leakage, protecting pump components, and ensuring reliable cooling water circulation, which is critical for maintaining optimal engine operating temperatures.