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The HOFFMAN DEFENDER™ Series features rotary screw blower packages with capacity of up to 6,180 cfm. With flexible configurations and enhanced technical features, our screw blower package is the perfect solution for environmental applications such as municipal wastewater treatment.
with patented rotors to reduce the number of revolutions and enhance the capacity-pressure ratio.
due to high-efficiency internal compression, silencers, and a noise-reducing enclosure.
installation and configuration
and ensures operation at the point of best efficiency.
with simple and robust construction.
as compared to Rotary Lobe Blowers.
In wastewater treatment plants, energy consumption accounts for over 50% of annual costs. The HOFFMAN DEFENDER™ Screw blower range meets all cost reduction requirements, allowing customers to save between 15% and 30% on energy consumption when compared with other technologies.
Offering the maximum amount of air with minimum energy consumption thanks to its internal compression, the DEFENDER™ Series is also extremely versatile in both continuous and ‘stop and start’ use. In addition, the ability to provide pressure levels of 14.5 psig means the DEFENDER™ can feed deep collection basins in wastewater applications - combining the best possible use of limited urban space with low levels of noise pollution.
Our rotary screw blower packages ensure a high level of efficiency within a wide compressor rotation speed range reducing energy consumption. In addition, it’s robust construction and use of minimum parts contribute to high reliability and long intervals between maintenance.
Our screw blower packages offer a turndown capability in flow to meet the needs of the customer. It’s also suitable for intermittent use with frequent stops and restarts to best satisfy the specific process requirements. The belt drive ensures the right capacity for the application to ensure operation at optimal efficiency.
The optimum efficiency of internal compression, guaranteed by an innovative rotor profile, means less noise during the compression phase. The low rotor rotation speed and the absence of a step-up gear along with special silencers and a noise-reducing enclosure (also available without sound hood), guarantees low noise levels from the compressor and allows for installation in a variety of applications.
The design of each component of the blower, together with a low operating speed, make the DEFENDER rotary screw blower package extremely reliable. At the same time, the controllers ensure optimum machine operation via the continuous monitoring of the operating parameters. The functions of remote diagnostics and predictive maintenance are proven to contribute to reducing downtime.
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*Atmospheric Air: Absolute pressure 14.7 psi, Temperature: 68°F, Relative Humidity: 36%
** Flow Tolerance ± 5%
