Atlas Copco O.F.S.K-21 LP Compressor Element – 1616 5803 81
Quick Specs
– Brand: Atlas Copco
– Part Number: 1616 5803 81
– Description: O.F.S.K-21
– Stage:Low-Pressure (LP)
– Condition: Genuine New
– Availability: On Request
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Atlas Copco 1616-5803-81 is an “OFS K-21 low-pressure (LP) compressor element” used in Atlas Copco oil-free screw compressor systems. The element is identified by the OFS K-21 designation and is documented for compressor families including the “ZR110, ZR132, ZR145 and ZT110”, with additional references to ZT132 and ZT145 applications.
As an LP element, 1616-5803-81 should be distinguished from other air-end references used within the same ZR/ZT oil-free compressor range. The stage designation is therefore an important part of the identification process, rather than relying only on the general air-end appearance or compressor model family.
When sourcing a replacement, match the complete 1616580381 part number and OFS K-21 element code with the existing compressor documentation. The machine model, serial number and physical element identification should also be checked to confirm the correct configuration before ordering.
Technical Details
| Part Number | 1616580381 |
| Description | O.F.S.K-21 |
| Brand | Atlas Copco |
| Product Status | Original |
| Stage | Low-Pressure (LP) |
| Weight | 138kg |
| Dimension | 620*460*380mm |
| Application | ZR110, ZR132, ZR145, ZT110 |
| Packaging | Wooden crate |
| Availability | On Request |
| Country of Origin | Belgium |
Signs Your Air End Needs Replacement
Consider replacing the air end if you notice:
– A gradual drop in discharge pressure or airflow at the same load
– Rising discharge air or oil temperature without a clear cause
– Increased vibration or unusual noise from the compression chamber
– Rising energy consumption for the same output over time
These symptoms typically point to internal wear — rotor clearance, bearing wear, or seal degradation — rather than a component elsewhere in the airend package.
Common Questions
How do I confirm this is the correct part for my compressor?
Send us the part number and a photo of the compressor nameplate. We will verify compatibility before issuing a quotation.
How long does delivery take?
Lead time depends on stock availability at the time of order. We confirm the exact timeline within 24 hours of your inquiry.
Can I install this myself?
Air end replacement requires precision alignment and commissioning. We recommend a qualified compressor technician perform installation to protect warranty coverage and ensure correct fitment.
Is there a minimum order quantity?
Minimum order quantity is 1 unit.
What payment methods do you accept?
T/T (bank transfer).
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.
Are these genuine parts?
Yes. Parts are sourced through Atlas Copco distributor channels.
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