instrument air skid system rated at ~90 SCFM with a -40°F pressure dew point

You’re essentially describing an instrument air skid system rated at ~90 SCFM with a -40°F pressure dew point—this is a very standard industrial spec used in oil & gas, power plants, and process industries.

Here’s a clear breakdown plus real equipment options you can use.

• Reliable for continuous plant air systems
• Common in manufacturing and utilities

• Space-efficient
• Good for packaged skid builds

For your spec, focus on:

• Must consistently hit -40°F at worst ambient conditions
• Look for twin-tower desiccant + purge control

• Heatless dryers use ~15–20% purge air
• Impacts compressor sizing

• Pre + after filters are critical for instrument air quality

• Dew point sensor
• High humidity alarm
• PLC integration (for skid systems)

• If you need a complete instrument air skid, these dryers are just one part—you’ll need full system integration

• Your requirement (90 SCFM @ -40°F) = classic heatless desiccant dryer + skid package
• The BEKO ACC 90 is a strong reference model for this spec
• For a full skid, vendors like NOXERIOR or system integrators typically bundle everything into one engineered package

I can:

• Design a complete instrument air skid (P&ID + sizing)
• Recommend compressor + receiver sizing
• Help with RFQ/spec sheet for vendors

Just tell me your industry (oil & gas, pharma, etc.) and site conditions