FS-Curtis RNB50 Non-Cycling Refrigerated Dryer 50 SCFM #FRNB00050-1XA5XX

FS-Curtis RNB50 — 50 SCFM Refrigerated Air Dryer

A busy independent shop pulling air for three or four bays off one compressor can't afford the next tool that comes back wet or the next paint job that streaks from tank moisture — and doesn't want to run 3-phase power just to get there. The RNB50 is the largest RNB model that still runs on a standard 115V outlet, giving that shop the top of the single-phase capacity range before the next step up requires 3-phase electrical work.

That's what the FS-Curtis RNB50 solves — a 50 SCFM non-cycling refrigerated dryer, holding dew point steady instead of swinging as demand changes throughout the day. It's also available with a factory-matched Filter Package (prefilter CF7-20-4-DPL + afterfilter CF5-20-4-DPL) as an add-on option, which skips the trial-and-error of matching aftermarket filters to this flow rate — FS-Curtis already did that math.

Who the RNB50 Is Built For

• ✅ A single-bay independent shop running one small piston compressor that's tired of draining rusty water out of the air lines every week and wants that problem solved for good
• ✅ A shop that just had a customer come back with a paint job full of fisheyes from moisture in the line, and doesn't want to explain that call again
• ✅ An owner replacing a worn-out or discontinued dryer who wants a straightforward drop-in unit — same footprint, same 115V outlet, no rewiring or re-plumbing required
• ✅ A mobile mechanic or small specialty shop where floor space is tight and a compact, wall-mountable dryer matters as much as the moisture removal itself
• ✅ A shop investing in pneumatic tools or a paint booth for the first time and wanting to protect that investment from day one instead of waiting for a corrosion problem to show up

What the RNB50 Is NOT Built For

• ❌ Multi-bay commercial shops running several impact wrenches, tire machines, and paint guns off the same line at once — step up to a 75+ SCFM model built for that volume
• ❌ Facilities that already run 3-phase power and want a dryer sized to match a larger 3-phase compressor — this tier is built around standard 115V single-phase

What Makes the RNB50 Different

Heat Exchanger

The RNB50 uses a copper tube-on-tube heat exchanger, engineered for reliable, consistent dew point control at 50 SCFM without fouling or excess pressure drop.

Condensate Drain

Timed electric drain removes collected moisture automatically — condensate clears itself out on schedule, without adding a task to anyone's routine.

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 (CF7-20-4-DPL) and afterfilter (CF5-20-4-DPL), sized to this dryer's flow rate and ready to plumb — one less step for your install crew.

Full Specifications — RNB50

FS-Curtis Warranty — RNB50

FS-Curtis backs the RNB50 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.