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Lube Additives for Compressor Oils
Overview:
Rotary screw, reciprocating, and centrifugal compressors generate significant heat and air–oil interfacial area, promoting oxidation and deposit formation.
Why an additive package is required:
- Suppress oxidation and inhibit varnish to prevent rotor/valve sticking and heat exchanger fouling.
- Control foam and air release for stable compression efficiency.
- Provide rust and corrosion protection during intermittent service and condensate exposure.
Typical additive families employed:
Antioxidants (amine/phenolic), AW agents where required, anti-foam, rust/corrosion inhibitors, metal deactivators; demulsifiers for water separation.
Indicative performance tests:
RPVOT (ASTM D2272), TOST (ASTM D943) for mineral systems, foam (ASTM D892), air release (ASTM D3427), rust (ASTM D665), deposit tendency (varnish/patch colorimetry).
Recommended PX Products
|
Product
|
Function
|
Dosage
|
|---|---|---|
|
PX 3811
|
Oxidation Inhibitor
|
1.0 – 4.0
|
|
PX 3806
|
Premium antioxidant
|
0.05 – 1.0
|
|
PX 3807
|
Premium antioxidant
|
0.05 – 1.0
|
|
PX 3843
|
Demulsifier & Defoamant
|
0.05 – 0.30
|
|
PX 4005
|
Dispersant
|
1.0 – 3.0
|
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