The Haag + Zeissler ROTATING Series 9001 MD is a durable rotary union engineered for the transfer of air, steam, water, heat transfer oil, non-toxic gases, and vacuum in rotating machinery. It supports a maximum pressure of 17 bar for water, 10 bar for steam, and 6 bar for air, heat transfer oil, and non-toxic gases, with 0 bar for vacuum operation. The unit achieves speeds up to 500 rpm with NPT threads and up to 800 rpm with ISO 228 threads, and is also available with welded flange and quick-release options for flexible installation. Designed for long service life, reliable sealing, and smooth operation under thermal and mechanical stress, the 9001 MD delivers stable performance across diverse industrial applications. Across North America, Europe, Asia, and worldwide, installation configurations and connection standards may possibly differ according to regional process requirements and engineering specifications.