Compressed Air Treatment
Refrigerated and desiccant dryers, coalescing filters, air receivers and condensate management — configured as a complete clean-air package to protect tools, machines and production output.
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Clean air.
Protected production.
FS CURTIS compressed-air treatment equipment removes moisture, oil aerosols and particulates before air reaches your machines. ITT sizes dryers against actual compressor flow, inlet temperature and pressure, stages filtration to ISO 8573 targets, and integrates receivers and drains for a dependable air-quality package — from general workshop duty to instrument-grade supply.
Application-led air treatment
Select a treatment stage to see FS CURTIS technology, operating principles and typical plant applications from the AIR DRYER catalogue.
Refrigeration air dryers — eCOOL technology
Cross-flow pre-cooler and evaporator with built-in stainless-steel demister moisture separator maximise heat transfer and protect downstream equipment. Non-cyclic hot-gas bypass maintains stable dew point across varying loads. Units ship pre-piped and wired with automatic electronic condensate drains.
- Models CR 20 to CR 2500 — 20 to 2500 cfm nominal capacity
- Rated 3°C pressure dew point; ISO 7183 flow capacities
- PUF insulation, non-ferrous air passages, ozone-friendly refrigerants
- Up to 16 bar g working pressure (12.5 bar g on largest models)
- Ideal for general manufacturing, packaging, CNC and assembly lines
Desiccant compressed air dryers
Pressure-swing adsorption removes moisture to −40°C pressure dew point. Wet air passes a coalescing pre-filter, through a desiccant tower and after-filter. Regeneration uses depressurisation and a controlled purge of dry air to restore the offline tower.
- DRC compact range: 10 to 375 scfm in space-saving packages
- DR series: 400 to 1144 scfm for high-flow industrial duty
- 4-minute cycle, 10% regeneration volume, −40°C outlet dew point
- Pre-filter 0.3 µm coalescer; 16 bar g max working pressure
- Suited to outdoor lines, instrumentation and low-humidity processes
Compressed air filters — FFA series
High-efficiency aluminium FFA filters with pleated elements, differential pressure gauges and automatic condensate drains deliver clean, technically oil-free compressed air across the distribution network.
- Grade P: 3 µm particles — 0.03 bar g initial ΔP
- Grade U: 1 µm + 0.1 mg/m³ oil — general protection
- Grade H: 0.01 µm + 0.01 mg/m³ oil — coalescing duty
- Grade C: 0.003 mg/m³ oil — activated carbon polish
- FFA05 to FFA300 — G½ to G3 connections, 16 bar(g) standard
Air receivers, separators & drains
Proper storage and condensate management stabilise system pressure, reduce compressor cycling and protect air quality. ITT integrates correctly sized receivers with zero-loss or timed drains at low points across the network.
- Air receivers sized to ISO 8537 and plant demand profiles
- Moisture separators upstream of dryers and filters
- Automatic electronic and pilot-operated condensate drains
- Pressure-drop audits across filter and dryer stages
- Maintenance planning for element changes and drain service
Refrigerated vs desiccant drying
Compare FS CURTIS refrigeration and desiccant technologies across dew point, energy use and typical applications — so the right dryer matches your air-quality target and operating conditions.
Refrigerated sizing (CR)
| Formula | Capacity ÷ (C1×C2×C3×C4) |
| Inlet temp rated | 45°C (max 60°C) |
| Ambient rated | 40°C (max 50°C) |
| Inlet pressure | 7 bar g rated (max 16) |
| Dew point rated | +3°C PDP |
Desiccant sizing (DRC / DR)
| Formula | Flow ÷ (Factor T × Factor P) |
| Example | 375 cfm @ 6 bar, 45°C → DR 500 |
| Outlet dew point | −40°C standard |
| Cycle time | 4 minutes |
| Pre-filter | 0.3 µm coalescer |
Filter grades (FFA)
| Grade P | 3 µm particulate |
| Grade U | 1 µm + 0.1 mg/m³ oil |
| Grade H | 0.01 µm coalescing |
| Grade C | 0.003 mg/m³ oil removal |
| Working pressure | 16 bar(g) standard |
FS CURTIS product range
Refrigerated dryers, desiccant towers and FFA filtration — specified and commissioned as one air-quality system by ITT.
Refrigerated Dryers (CR)
eCOOL refrigeration dryers with cross-flow heat exchanger, stainless demister, hot-gas bypass and automatic condensate drain. Pre-piped and wired for fast commissioning.
- Non-cyclic hot-gas bypass for stable dew point
- PUF insulation — ozone-friendly refrigerants
- 220V/1ph to 415V/3ph electrical options
Desiccant Dryers (DRC / DR)
Twin-tower pressure-swing adsorption for −40°C pressure dew point. Compact DRC models for smaller flows; DR series for high-capacity industrial and instrument-air duty.
- 4-minute cycle with 10% regeneration purge
- 0.3 µm coalescing pre-filter included in spec
- Temperature and pressure correction factor sizing
Filters (FFA)
Aluminium FFA threaded filters with pleated elements, differential pressure gauges and automatic condensate drains deliver clean, technically oil-free compressed air across the distribution network.
- FFA05 to FFA300 — differential gauge standard
- Up to 50 bar(g) filters available on request
- Grade P through C for staged ISO 8573 filtration
FS CURTIS quality & ITT support
FS Compressors India Pvt. Ltd. manufactures FS CURTIS dryers and filters with ISO 9001:2008 certification. ITT — authorised distributor in Faridabad — sizes, supplies and services complete air-treatment packages for Delhi NCR industry.
ISO 9001 Certified
FS CURTIS air treatment built under ISO 9001 quality systems with eCOOL energy-efficient refrigeration technology.
Correct sizing
ITT applies inlet temperature, pressure and ambient correction factors — not catalogue numbers alone.
Field support
Installation, filter element changes, drain service and dew-point verification across Faridabad and NCR.
Frequently asked questions
Plan your air treatment package
Request a dew-point and filtration audit — or download the FS CURTIS AIR DRYER catalogue for full specifications.