As special paper-making seals exclusively compatible with Sulzer®APP pump chambers, both the 2230 and 2240 series are designed around the working conditions and equipment needs of the paper-making industry. They strictly comply with relevant industry standards, fully consider the characteristics of pulp media in material selection and structural design, and possess good corrosion resistance and wear resistance. The two series have clear divisions of labor: the 2230 series focuses on general working conditions, balancing stability and convenience; the 2240 series targets working conditions with severe media, enhancing sealing performance and adaptability. Together, they provide comprehensive sealing protection for Sulzer®APP pump chambers, helping paper-making enterprises reduce equipment failure rates, improve production continuity, and adapt to the needs of paper-making production of different scales and processes.