Atlas Copco Oil Filter – 1621 7378 90
Quick Specs
– Part Number: 1621 7378 90
– Description: Oil Filter
– Product Status: Original
– Availability: In Stock
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The 1621-7378-90 is Atlas Copco’s genuine oil filter for oil-injected screw compressors, superseding the earlier part number 1621-7378-00 — the two are interchangeable, with 1621-7378-00 still commonly referenced on older nameplates and manuals. This is a larger-format filter (roughly 14cm across, 31cm tall) sized for bigger stationary compressors; third-party sources point toward the GA160-class range specifically, though listings vary on the full model span, so we’d recommend confirming against your compressor’s nameplate before ordering.
Technical Details
| Part Number | 1621737890 |
| Description | Oil Filter |
| Brand | Atlas Copco |
| Status | Original |
| Condition | New |
| Weight | 2.1kg |
| Dimension | 14*14*31cm |
| Application | Oil Injected Screw |
| Packaging | Box |
| Availability | In Stock |
| Country of Origin | Germany |
Equivalent / Replaced Part Numbers
– 1621737800
Compatibility and part numbers are for reference only.
A Detail Easy to Miss When Changing the Filter
Removing the old filter often leaves residual oil and contaminants inside the filter housing or on the mounting surface.If this residue isn ‘t wiped clean before installing the new filter,some of the contamination the old filter had trapped can end up back in the system — undermining the point of changing both the oil and the filter at the same time.
A clean mounting surface and a properly torqued (not over-tightened) new filter matter as much as the replacement interval itself.
Why Filter Micron Rating Matters
Oil filters are rated by micron size — the smallest particle size they reliably trap.Using a filter with a coarser rating than specified lets more contaminants circulate through the compressor,accelerating wear on bearings and rotor surfaces. A finer-than-specified rating isn ‘t automatically better either — it can restrict oil flow and trigger the bypass valve more often,temporarily allowing unfiltered oil through. Matching the original specification is the safer default.
Common Questions
What happens if I don 't change the filter on time?
The bypass valve will eventually open,letting unfiltered oil circulate.The compressor keeps running,but bearing and rotor wear can accelerate without any obvious warning sign.
Can I use a non-genuine filter with genuine oil,or vice versa?
Mixing is common in practice,but bypass valve calibration and filtration performance can differ between brands — worth ruling out as a variable if you ‘re troubleshooting an oil-related issue.
Are these genuine parts?
Yes. Parts are sourced through Atlas Copco distributor channels.
What payment methods do you accept?
T/T (bank transfer).
What is the typical lead time?
Common consumables (filters, oil) typically ship within about 1 week. Lead time for other spare parts depends on stock availability — please contact us for a confirmed schedule.
Do you inspect parts before shipment?
Yes. We provide full photos and video of the actual item before shipment, and confirm everything is correct with you prior to dispatch.
What shipping options are available?
If you have your own freight forwarder, we can ship to them directly. If not, we can provide shipping options based on your preference.