NTT was founded with the belief that robust integrally geared turbocompressors are a requirement within the municipal and industrial waste water industry – today and for years to come.
The management team combines nearly 50 years of experience within the industry and is passionate about turbo-compressors. We build a machine from the ground up, relying on state-of-the-art materials and design techniques to create the smartest turbo on the market. Our mission is to provide the industry with a modern, robust and lasting in heavy duty conditions product that can be absolutely depended on.
The main factory is located in the municipality of Varese in Northern Italy, close to Milano and the Swiss border. As one of the most industrialized areas in Northern Italy, with major global aviation and military manufacturing companies operating here, it sustains a landscape of highly specialized machining companies.
Our integrally geared centrifugal turbocompressor range features four distinct frame families up to 2 MW installed motor power, customizable to your project needs. The frame families are available in a plug & play compact package with all auxiliary parts fully enclosed and ready to start, or with a more traditional assembled modular enclosure.
The drive configuration can be chosen as either low voltage B3 or B5 (flange); as well as medium voltage B3. At the heart of each turbocompressor package is the compressor core unit and its most important characteristic: the flow/ pressure regulating system. The choice of regulating system determines the turbocompressor’s performance over the entire operating range, especially in off-design conditions. It also determines the level of turndown possible. All NTT turbocompressors typically feature a wide 40-100% airflow regulation range.
- Main Castings: Nodular cast iron EN GJS-400/15 EN1563, design: 6,5 bar, 200C
- Impeller: Aluminum W.Nr.3.1924 AlCu2MgNi; milled from a solid forged block; open, with radial backward-leaning blades, can withstand corrosion up to 10ppm of H2S
- Mechanical components : Steel 34CrNimo6
- Gear whells: High tensile steel 16NiCrS4, hardened and ground
- Lubrication: Forced oil mist lubrication with integrated positive displacement pump, oil/air cooler, oil filter 10 µm
- Power connection: Low voltage – between 380 and 690Vac – 3-phase – 50 or 60Hz. Compact enclosure includes all power switches and connections. Main power connection accessible from bottom or top.
- Medium voltage – between 3300Vac and 6600Vac – 3-phase – 50 or 60Hz, B3 frame equipped with selectable instrumentation and flexible coupling.
- Our most competitive turbo compares well with direct drive and screw-type compressors in low flow applications.
- Highest efficiency in our customized and optimized compressor design.
- Stable with high efficiency across the full operating envelope range with our 2-point control.
- Maximum airflow regulation turndown with our discharge diffuser vane system, allowing between 40-100% of airflow.
- Fully enclosed plug & play package for the compressor and all its auxiliaries.
- Full integration of automation solution with Local and Master Control as well as Oxygen Control available.
- Next turbo compressors do not require additional equipment such as THD (Total harmonic oscillation) filter.
- Longest lifetime – offers more than 20 years of lifetime for your investment
- Reliable operations – thanks to a robust mechanical design; perfect for challenging environments
- Proven technology – with a global reference base in waste water aeration applications
- Spare parts security– with standard main auxiliaries readily available on the market
- The plug & play package concept is gaining momentum in the industry. This concept is applied to NTT’s integrally geared turbo compressor line
