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Sullair has redesigned its 100-600HP two-stage tandem rotary screw compressors to provide increased levels of energy efficiency and operating performance.

The compressors offer a choice of either constant-speed drive models TS-20, TS-32 and TS-32S, with capacities of 500-3,000acfm, or variable-speed drive (VSD) models V-200TS and V320TS, which have a capacity range of 495-2,310acfm.

Pressures for all Sullair two-stage tandem models range from 100-175psig.

Variable capacity control, achieved with Sullair’s spiral valve technology, allows the compressor to match pressure and capacity with system demand.

At full load, the tandem compressor and spiral valve have proven to be 13 per cent more energy efficient, according to Sullair.

At 60 per cent load, the two-stage tandem compressors are said to provide up to 30 per cent savings over single-stage compressors.

Further part-load and full-load energy savings are achieved with optional VSD, which Sullair said provides the highest power factor over the entire frequency range.

The Sullair tandem compressor with an optional heat recovery enclosure is said to save more energy by recovering expended heat from the compressor that can be used as supplemental comfort heating, or make-up air for process heating.

All models feature Sullair’s Multi-Stage Air Fluid Separation with a dual nested Optimiser separator element to minimise fluid carryover.

The Optimalair heavy-duty air intake filter provides the fine inlet filtration while reducing pressure drop for additional energy savings throughout its operating life.

The Sullair two-stage compressors also feature the most advanced upgrade of Sullair’s Supervisor Controller, a computer-compatible microprocessor control unit, that provides critical operating information using graphics of monitored functions; and easy-to-use stop/start, sequencing and activation controls.

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