Parameter duty
Class 0 oil-free compressor
Class 0 means a stated test method at a stated point in the air system. An oil-free airend without a paper is not Class 0 on this desk.
What belongs on the RFQ
Write the duty point
Food, beverage and pharma buyers ask for Class 0 because a residual-oil number belongs in the validation file. The plant must say whether the test is at the package outlet or after the dryer and sterile housing.
Put kW or FAD, working pressure, ISO 8573-1 class, dryer type, sterile filter, voltage and the audit standard (if any) on the RFQ. Missing certificates stay missing — we do not write ISO 8573-1 onto a catalog row that the factory did not supply.
Matching machines are published oil-free series from listed Chinese plants. Scroll, dry screw and water-lubricated screw are different architectures; say which one the process allows.
- ISO 8573-1 class and the test point
- Oil-free architecture (dry screw, water-lube, scroll)
- Working pressure and FAD or kW
- Dryer and sterile filter
- Voltage / frequency
- FOB Shanghai or named CIF port
Matching plants
Factories whose series can hold it
The plant remains the seller. Quotes are comparable because the RFQ is the same sheet.
| Plant | Cluster | Specialty | Documents | Export |
|---|---|---|---|---|
Hitachi IEC
Nanjing Jiangning
|
Nanjing | Historical air-compressor manufacturing; Hitachi DSP NEXT II and SDS-U catalogue references with offer-specific production identity |
|
Export ready |
CMN
Taizhou Bay New Area
|
Taizhou | Water-lubricated CM/PV and medium-pressure CM/GPV screw; direct-drive CMW scroll |
|
Export ready |
Feihe
Shanghai Baoshan
|
Shanghai | Water-lubricated oil-free screw · FHOGY diesel portable and FHLY centrifugal air packages |
|
Export ready |
Hitachi Sullair
Suzhou Industrial Park
|
Suzhou | Sullair stationary oil-flooded screw · DS dry oil-free screw and diesel portable air |
|
Export ready |
Guangdong Ecoair
Foshan Sanshui
|
Foshan | PM variable-speed · Two-stage and oil-free screw compressors |
|
Export ready |
B&D
Foshan Sanshui
|
Foshan | PM VSD screw · Low-pressure PM VSD · Laser-cutting packages |
|
Export ready |
Zhigao
Quzhou
|
Quzhou | Electric screw compressors · Oil-free two-stage compressors · Rock-drilling equipment |
|
Export ready |
Kobelco
Shanghai
|
Shanghai | KOBELION oil-injected screw and Emeraude oil-free compressed-air systems |
|
Export ready |
Crownwell
Shanghai
|
Shanghai | CWD oil-injected screw; CW OF oil-free screw; CW/CWH diesel portable compressors; air treatment |
|
Export ready |
AirHorse
Zengcheng
|
Guangzhou | Oil-injected screw · Oil-free · Blowers |
|
Export ready |
Zhongshan AE Machinery
Zhongshan
|
Zhongshan | PM VSD screw · Oil-free screw · Process gas |
|
Export ready |
Ganey
Shunde
|
Foshan | OG single-screw · OX oil-free scroll · OGW water-lubricated oil-free single-screw |
|
Export ready |
Published series
Catalog rows — not invented SKUs
Where a factory published a series, it is listed. Empty kW / FAD cells are confirm-on-RFQ.
| Catalog ref. | Type | Power | Pressure | Flow | Air quality | Plant | |
|---|---|---|---|---|---|---|---|
 FEIHE-FHOGDWYFeihe water-lubricated oil-free screw — WY / PM / WYH selections
|
Oil-free | Selected PM8F / PM22F: 7.5 / 22 kW | PM examples 0.8 MPa; WYH separately | PM22F 1.1–3.7 m³/min at 0.8 MPa | — | Feihe | RFQ |
 CMN-CMPVCMN CM/PV water-lubricated PM VSD screw — cooling variants
|
Oil-free | Selected CM22PV:22 kW; table examples7.5–315 kW | CM22PV rows:0.8 / 1.0 / 1.25 MPa | CM22PV:1.40–3.50 m³/min at0.8 MPa | — | CMN | RFQ |
 HENGDA-LP-SEMIHengda ZW, VW and double-machine low-pressure semi-oil-free series
|
Oil-free | — | — | — | — | Hengda | RFQ |
 HITACHI-DSP-NEXT2Hitachi DSP NEXT II — 90A and 110W catalogue examples
|
Oil-free | 90A: 90 kW; 110W: 110 kW motor | 0.75 / 0.86 / 1.0 MPaG | 90A: 16.4 / 13.9 / 13.4 m³/min | — | Hitachi IEC | RFQ |
 HANDE-OILFREEHD-DSPM dry screw and Hande oil-free equipment
|
Oil-free | 90 kW · HD-DSPM90 example | 0.8 MPa (8 bar) · HD-DSPM90 | 14.9 m³/min · HD-DSPM90 | — | Hande | RFQ |
 AE-OILFREE-SCREWAOF / AOFM dry oil-free screw compressors
|
Oil-free | 55 kW · AOF55 / AOFM55 examples | — | Delivery at agreed pressure / reference basis | — | Zhongshan AE Machinery | RFQ |
 AIRHORSE-OILFREEAirHorse oil-free screw compressor systems
|
Oil-free | 10–420 HP · published family range | Selected oil-free model / pressure duty | Pressure-matched delivery and test basis | — | AirHorse | RFQ |
 CROWNWELL-OILFREECrownwell CW OF oil-free screw variants
|
Oil-free | 22 kW · selected CW22 variants | 7 / 8 / 10 bar(g); LP at 4 bar(g) | 7 bar(g): OF 3.7; VSD 2.2–3.7; PM 0.6–3.7 | — | Crownwell | RFQ |
 UNITED-OSD-OILFREEUnited OSD dry oil-free variable-speed screw compressors
|
Oil-free | — | — | — | — | Shanghai United | RFQ |
 XINDA-WGPSXinda AUGUST WG(P)S water-lubricated oil-free screw selection
|
Oil-free | — | — | — | — | Ningbo Xinda Screw Compressor | RFQ |
 KOBELCO-EMERAUDEEmeraude ALE IV oil-free screw compressors, 55–120 kW
|
Oil-free | 55–120 kW · ALE IV reviewed range | 0.86 MPa max · selected 75 kW rows | 75 kW IPM: 11.8 air / 13.6 water m³/min · source rows | — | Kobelco | RFQ |
| ZHIGAO-DRY-OILFREEZhigao AS / AS·V oil-free two-stage compressor families | Oil-free two-stage | Select AS / AS·V model | 8 / 10 bar · family headings | Select pressure-qualified model delivery | — | Zhigao | RFQ |
FAQ
Before you send the sheet
Is oil-free the same as Class 0?
No. Oil-free is the airend. Class 0 is a measured residual-oil claim against a method. Put both on the sheet.
What should I request for Class 0?
Ask for a current ISO 8573-1 test report covering the quoted configuration and operating conditions.
Class 0 oil-free compressor: Voltage and frequency matter as much as bar. Typical first reply: 1–2 working days after the plant confirms it can hold the duty.
Issue RFQ