FS-Curtis RNB250 Non-Cycling Refrigerated Dryer 250 SCFM #FRNBX00250-4XA5XX

FS-Curtis RNB250 — 250 SCFM Refrigerated Air Dryer

A plant running a compressor in the 40-50 HP range needs a dryer sized to that specific output, not a smaller unit stretched past its rated capacity — the RNB250 is built for exactly that middle-industrial range.

That's what the FS-Curtis RNB250 solves — a 250 SCFM non-cycling refrigerated dryer, a reliable moisture-control layer that just works in the background, freeing your team to focus on the actual job. It's also available with a factory-matched Filter Package (prefilter CF7-32-12-DGL + afterfilter CF5-32-12-DGL) as an add-on option, which removes a common install mistake — mismatched filter sizing — by shipping the correct prefilter/afterfilter pair from the factory.

Who the RNB250 Is Built For

• ✅ An industrial facility or large commercial shop running a high-output rotary screw compressor that needs matched, continuous-duty drying capacity
• ✅ An operation with a centralized compressed air system feeding multiple work areas, production lines, or bays from one header
• ✅ A facility that needs dependable, round-the-clock dew point control at high SCFM without the pressure drop that undersized filtration or dryers introduce
• ✅ A plant manager replacing an aging industrial dryer who needs the new unit to match or exceed the old one's throughput without a costly re-pipe of existing 2-inch/3-inch/4-inch flanged connections
• ✅ An operation where compressed air system downtime for dryer service is expensive, making reliability and manufacturer-backed 2-year coverage a real purchasing factor, not an afterthought

What the RNB250 Is NOT Built For

• ❌ Small or mid-size shops — this tier is sized for industrial-volume air systems and is oversized, and overpriced, for a single-bay or light commercial operation
• ❌ Facilities without existing 3-phase power infrastructure or the floor space and flanged/NPT piping this unit's footprint and connections require

What Makes the RNB250 Different

Heat Exchanger

The RNB250 uses a stainless steel brazed plate heat exchanger, engineered for reliable, consistent dew point control at 250 SCFM without fouling or excess pressure drop.

Condensate Drain

Timed electric drain removes collected moisture automatically — it operates unattended on a preset schedule, keeping the system clear without manual intervention.

Refrigerant & Air Quality

Uses R513A refrigerant, a low global-warming-potential option, and delivers ISO 8573-1:2010 Class 4–5 pressure dew point — dry, reliable air for general shop and industrial use.

Optional Filter Package

Choose the “Includes Filter Package” option to add a factory-matched prefilter (CF7-32-12-DGL) and afterfilter (CF5-32-12-DGL), sized to this dryer's flow rate and ready to plumb — one less step for your install crew.

Full Specifications — RNB250

FS-Curtis Warranty — RNB250

FS-Curtis backs the RNB250 with a 2-year parts & labor warranty.

Warranty service is through Alamo Equipment & Service — call (844) 480-6059 instead of waiting on a manufacturer hotline. Coverage is subject to FS-Curtis warranty terms, conditions, and requirements.