SULLAIR 88290015-049 Air Oil Separator: Complete Technical Guide and Performance Analysis
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What is the 88290015-049 separator element?
A replacement air-oil separator element for Sullair screw compressors, part number 88290015-049 — the cartridge that strips the oil mist out of the compressed air leaving the airend and returns the oil to the circuit. This is a Chinese-made replacement (国产替代): a white glass-fibre pleated element with metal end caps, a red O-ring seated in the top recess for the housing seal, a centre outlet tube through the caps, and the grounding tab on the base — stamped 88290015-049 · DL01 on the bottom cap and labelled 油分 (oil separator) · QTY 1 on its box. Recorded 24 November 2025 at about 0.5 kg, new. Four photos below.
Part details
| Field | Value |
|---|---|
| Part number | 88290015-049 — stamped on the base cap, printed on the box label with 油分 |
| Fits | Sullair screw air compressors (air-oil separator element) |
| Construction | Pleated glass-fibre (borosilicate) media, metal end caps, centre outlet tube |
| Sealing | Red O-ring in the top recess |
| Grounding | Metal tab on the base cap — must contact the housing to bleed static charge |
| Markings | DL01 batch stamp; box label Co0— / 3211LC with bar codes and QR |
| Origin | Chinese-made replacement (国产替代) |
| Condition / quantity | New, boxed — 1 piece |
| Weight | About 0.5 kg |
| Intake recorded | 24 November 2025 |
Two details that decide whether the swap works
The separator is the most temperature-stressed filter in a screw compressor, and replacement elements fail for reasons that have nothing to do with the media. First, the grounding tab: compressed air charging through glass fibre builds a real static charge, and the factory element bonds itself to the housing through that metal tab on the base — if the tab lands on paint or sits clear of its contact point, the element works but the housing charges up, and you get static discharge inside an oil-mist atmosphere. Seat the tab exactly as the old one sat. Second, the O-ring: the red seal in the top recess does the pressure sealing, and a dry or nicked ring weeps oil into the air line for weeks before anyone notices the separator is bypassing. Wipe the housing seat, lube the ring with a smear of compressor oil, and torque the element home evenly. Change intervals on a healthy machine run by hours of loaded run time, not calendar months — an oil-misted aftercooler or rising oil consumption is the separator telling you its coalescing layer is saturated, and this cartridge is the drop-in answer to that service call.
Photos
All images below are original warehouse photos of the exact element covered by this record, taken before dispatch. Click any photo to view it full size.
The same element is listed in our shop as the 88290015-049 air-oil separator product page.
Sourcing help
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