The HST Turbocompressor from Sulzer has an advanced design with proven magnetic bearing technology and a high-speed motor driven through a built-in frequency converter. It has no mechanical wearing parts or lubricants requiring minimal maintenance. This is made possible by electronically controlled magnetic bearing technology, which levitates the integrated rotor/shaft/impeller single-piece assembly. The result is a compressor with no performance deterioration over time and no need for scheduled maintenance. 203/238-2700; www.sulzer.com; Booth 2012.