Oil-Free Air Compressors: Sales, Service and System Design
Oil Free Air Compressors: ISO 8573-1 Class 0 Air, Sized to Your Process
Class 0 only where it earns its cost and an honest oil-flooded alternative where it does not, sized against your process either way.
Do I need an oil-free compressor, or is oil-flooded with filtration enough?
Oil-free Class 0 is mandatory where compressed air can touch product or people: direct food contact, pharmaceutical production, medical air, and breathing air. For most general manufacturing, a modern oil-flooded rotary screw with proper filtration delivers the air quality the application requires at meaningfully lower cost. The deciding question is whether a trace of oil in the line is a quality incident or a regulatory violation; if it is neither, oil-flooded usually wins on total cost. As one of the Midwest's oil free compressor manufacturers' partners, Brabazon can size either path honestly against your process.
Oil-Free Air Compressors - Clean Air for Critical Applications
Oil-free air compressors deliver 100% clean, contaminant-free compressed air - essential in industries where even trace amounts of oil can compromise product quality, safety, or regulatory compliance. Brabazon Pump, Compressor & Vacuum provides oil-free compressor solutions for pharmaceutical, food and beverage, electronics, medical, laboratory, and other sensitive-process industries throughout the Midwest.
Unlike standard compressors, oil-free models use alternative technologies - such as water injection, Teflon-coated components, or dry-running scroll mechanisms - to compress air without any lubricant contaminating the air stream. This eliminates the risk of product contamination and reduces the cost of downstream filtration equipment.
Brabazon stocks and services oil-free compressors from leading manufacturers and can help you select the right model based on your CFM requirements, pressure rating, duty cycle, and application. We also offer oil-free compressor rentals for short-term needs or production surges, with fast delivery throughout our service territory.
Where Class 0 is the requirement, not the upgrade
These applications either regulate oil content directly or carry recall-level consequences for contamination:
- Food and beverage production where air contacts product, packaging, or food-contact surfaces
- Pharmaceutical and cleanroom manufacturing operating under cGMP air quality specifications
- Electronics and semiconductor lines where oil residue ruins sensitive assemblies and coatings
- Medical air systems governed by NFPA 99 source requirements
- Breathing air for respirators that must meet OSHA Grade D specifications
Sullair oil free compressor lines we stock and service
We work with the leading oil free compressor manufacturers and carry Sullair Class 0 scroll, dry rotary screw, and centrifugal lines from lab-scale units to plant base load.
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Sullair SRL Oil Free Scroll
- Type
- Dry scroll
- Power
- 2 to 44 HP
- Class
- ISO 8573-1 Class 0
- Best for
- Labs, dental, light process air
-
Sullair DS Series
- Type
- Two-stage dry rotary screw
- Power
- 60 to 100 HP
- Class
- ISO 8573-1 Class 0
- Best for
- Continuous plant air, food and beverage
-
Sullair DSP Series
- Type
- Two-stage dry rotary screw
- Power
- 30 to 300 HP
- Class
- ISO 8573-1 Class 0
- Best for
- Pharmaceutical and electronics production
-
Sullair F Series Centrifugal
- Type
- Oil free centrifugal
- Power
- 200 HP and up
- Class
- ISO 8573-1 Class 0
- Best for
- High volume base-load air
-
Sullair T Series Centrifugal
- Type
- Oil free centrifugal
- Power
- 275 to 1,750 HP
- Class
- ISO 8573-1 Class 0
- Best for
- Large plants and utilities
-
Sullair OFD1550 Portable
- Type
- Portable oil free rotary screw
- Flow
- 1,550 cfm
- Class
- ISO 8573-1 Class 0
- Best for
- Rental and temporary Class 0 air
How to choose an oil free compressor
- Start with the purity spec. If the application names ISO 8573-1 Class 0, cGMP, NFPA 99, or Grade D, a certified oil-free source is the answer. If it only names a general dew point or particulate class, oil-flooded with filtration may satisfy it.
- Match technology to scale. Dry scroll suits labs and dental at low flow, two-stage dry rotary screw covers continuous plant air, and centrifugal takes over for high-volume base load above roughly 200 HP.
- Size to simultaneous demand, not nameplate. Total the cfm of what runs at once, then verify against your pressure and duty cycle. Use the CFM calculator for a starting range, then have an engineer confirm it against your demand profile.
- Plan the whole air system. Class 0 air still needs correctly sized dryers, receivers, and distribution. Compare dryer types in our refrigerated vs desiccant air dryer comparison and the guide on how to choose a compressed air dryer.
Class 0 versus oil-flooded with filtration
| Factor | Oil-free Class 0 | Oil-flooded plus filtration |
|---|---|---|
| Oil in air stream | None from the compressor by design | Very low, but the compressor remains a potential oil source |
| Best fit | Air that contacts product, people, or regulated processes | Tools, cylinders, and general plant equipment |
| Upfront cost | Roughly 30 to 50 percent more | Lower purchase and overhaul cost |
| Downstream filtration | Reduced, since the source is already clean | Coalescing and carbon stages required to reach purity |
Industries that rely on oil free air
Food and Beverage
Air that contacts product, packaging, or food-contact surfaces needs a certified oil free source. See food and beverage applications.
Pharmaceutical
cGMP cleanroom production specifies oil, particulate, and moisture limits. See pharmaceutical and medical applications.
Medical
Hospital medical air follows NFPA 99 source rules. See our medical air compressor page.
Electronics
Semiconductor and electronics assembly cannot tolerate oil residue. See electronics applications.
- 24/7 emergency response, under 2 hour average
- Factory-trained technicians
- 14 Midwest locations across WI, IL, MN, and MO
- Family owned since 1978, Sullair dealer since 1984
Our factory-trained technicians provide installation, preventive maintenance, and emergency repair for oil-free compressors - ensuring maximum uptime for your most critical processes. Contact Brabazon today to discuss your oil-free compressed air requirements and request a quote.
Oil free compressor questions, answered first
What does ISO 8573-1 Class 0 actually certify?
Class 0 certifies that the compressor adds no measurable oil aerosol, vapor, or liquid to the air stream under the test conditions of ISO 8573-1, the international compressed air purity standard. It is the strictest oil class in the standard and it applies to the compressor itself, not to filtration added downstream. A Class 1 system with filters can be very clean, but only Class 0 removes the compressor as a possible oil source.
Is there a difference between oil-free and oil-less compressors?
Yes. Oil-free machines like the Sullair DS and DSP series still use oil to lubricate gears and bearings, but the compression chamber is sealed off so no oil can touch the air. Oil-less machines have no oil anywhere in the unit, which is common in small dental or lab scroll units. For industrial flows, oil-free rotary screw and centrifugal designs are the practical choice because oil-less designs do not scale to high horsepower.
How does maintenance differ from an oil-flooded compressor?
You trade oil and separator changes for tighter attention to the airend itself. Oil-free machines skip the separator element and need far fewer oil changes, but their two-stage airends run hotter, so coolers, seals, and valves need scheduled inspection, and airend overhauls arrive sooner than on a comparable oil-flooded unit. A service agreement with factory-trained technicians keeps that schedule honest.
Why do oil-free compressors cost so much more?
The price gap comes from the hardware: two compression stages with precision-coated rotors, an interstage cooler, and high-temperature seals replace the simple oil-flooded airend, and the same is true for the larger service parts. Expect roughly 30 to 50 percent more upfront than an equivalent oil-flooded rotary screw, plus higher overhaul costs. That premium is justified when air touches product or people, and wasted when it does not.
Do you rent oil free compressors?
Yes. We offer oil free compressor rentals for short-term needs or production surges, with fast delivery throughout our service territory. Rental Class 0 units like the Sullair OFD1550 portable cover shutdown work, seasonal peaks, and bridging while a permanent machine is on order.
Get a Class 0 sizing recommendation from an engineer
Tell us your cfm, pressure, and purity target and an engineer will size a Class 0 system or an honest oil-flooded alternative, then quote sale, rental, or service. We answer 24/7.
Request a quote or book an air audit
Tell us your CFM, pressure, and purity target and an engineer will size a Class 0 system or an oil-flooded alternative, whichever your process actually needs. Request an oil-free system quote with sizing review. Urgent? Call 800.825.3222, answered 24/7.
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