The Haag + Zeissler ROTATING Series 9001 RL-MD is a high-quality rotary union engineered for the transfer of air, heat transfer oil, and vacuum in rotating machinery and thermal process systems. It supports a maximum pressure of 6 bar for air and heat transfer oil, and 0 bar for vacuum operation. The unit achieves rotational speeds up to 400 rpm for DN 50 (2"), 300 rpm for DN 65 (2 1/2") and DN 80 (3"), and 250 rpm for DN 100 (4"), ensuring efficient and leak-free performance across multiple pipe sizes. Built for reliability and long service life, the 9001 RL-MD combines robust sealing technology with smooth rotational stability, making it ideal for high-demand industrial environments. Across North America, Europe, Asia, and worldwide, installation and connection specifications may possibly vary according to regional mechanical standards and process system requirements.