NLSF Series (No Loss Split Flow type)
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Frequently Asked Questions
The NLSF Series is an engineered adsorption dryer designed to remove moisture from compressed air. It uses a split-flow regeneration method to support continuous drying performance in large compressed air systems.
The compressed air reaches a distributor, which sends part of the flow through a heater and into one adsorber, where the heat regenerates the desiccant. The remaining air bypasses the heater and is later recombined with the regeneration air before the drying stage, while the second adsorber handles the drying.
After passing through the regenerating adsorber, the regeneration air flows through an aftercooler and moisture separator. It is then mixed with the remaining compressed air before the drying stage.
Delair’s NLSF Series is designed for high-capacity compressed air applications and is available with capacities of up to 17,000 m³/hr (10,000 CFM), making it suitable for large industrial systems.
Unlike a heatless dryer, which consumes a share of already-dried compressed air (purge air) to regenerate its desiccant, the NLSF Series regenerates with heat and recombines the regeneration air back into the process — so no dried compressed air is lost. Per Delair’s energy comparison, this lowers running cost to about 12 kW to dry 1,000 m³/hr, versus about 20.7 kW for a heatless dryer, at the trade-off of a higher first cost.
