Synthetic Screw Air Compressor Oil (ISO VG 32 / 46 / 68)
Formulated from premium Polyalphaolefin (PAO) and synthetic ester base stocks fortified with advanced antioxidant and rust inhibitor chemistries, delivering an 8,000-hour service interval, rapid air release, and zero carbon-varnish deposit formation under discharge temperatures up to 110°C.
Tribological Standard Definition & Engineering Direct Answer
FOSS Synthetic Screw Air Compressor Oil is an extended-drain industrial lubricant formulated from high-purity Polyalphaolefin (PAO Group IV) and polyol ester (Group V) synthetic base stocks. Exceeding DIN 51506 VDL and ISO 6743-3A DAJ specifications, it is engineered for oil-injected rotary screw, vane, and centrifugal compressors operating under demanding discharge temperatures up to 110°C and pressures exceeding 15 bar. The fluid achieves an 8,000-hour operating lifespan under typical industrial conditions, backed by high thermal oxidation stability with a Conradson Carbon Residue increase under 0.15% (ASTM D189). It provides rapid air release (ASTM D3427 air separation under 4 minutes at 50°C), low foaming tendency (< 10/0 ml per ASTM D892), and outstanding demulsibility (ASTM D1401 water separation under 10 minutes at 54°C). The ester component naturally cleans existing varnish and conditions fluorocarbon (FKM) and PTFE seals without degradation. Compatible with Atlas Copco Roto-Inject, Sullair Sullube, and Ingersoll Rand Ultra Coolant replacement protocols. Supplied in UN 208L steel drums and 1,000L IBC totes.
Verified 208L Steel Drum Staging & Container Loading Bay
Photographic evidence from our Quanzhou plant floor and export container stuffing bay. Every batch is blended via automated mass-flow metering, sealed with waterproof tamper-evident bungs, and labeled with full batch test certificates.
Laboratory Physical & Chemical Parameters (Typical Test Values)
Every batch blended at our Quanzhou plant is certified against international testing standards before filling into UN 208L steel drums.
| Test Parameter | Test Method | ISO VG 32 | ISO VG 46 | ISO VG 68 |
|---|---|---|---|---|
| Kinematic Viscosity @ 40°C (mm²/s) | ASTM D445 | 32.2 | 45.8 | 67.4 |
| Kinematic Viscosity @ 100°C (mm²/s) | ASTM D445 | 6.1 | 7.8 | 10.4 |
| Viscosity Index (VI) | ASTM D2270 | 138 | 140 | 142 |
| Flash Point, COC (°C) | ASTM D92 | 248 | 256 | 264 |
| Pour Point (°C) | ASTM D97 | -48 | -45 | -42 |
| Air Release @ 50°C (minutes) | ASTM D3427 | 2.8 min | 3.2 min | 3.8 min |
| Demulsibility (40-40-0 @ 54°C) | ASTM D1401 | 8 min | 9 min | 11 min |
| Four-Ball Wear Scar (mm, 40 kgf, 1h) | ASTM D4172 | 0.38 | 0.38 | 0.37 |
| RPVOT Oxidation Life (minutes @ 150°C) | ASTM D2272 | > 2,200 min | > 2,400 min | > 2,500 min |
Primary Compressor Types & OEM Compatibility
Engineered specifically for high-stress industrial machinery, minimizing friction coefficients and extending component service life.
Oil-Injected Rotary Screw Compressors
Protects twin-screw rotors, roller bearings, and oil separators in Atlas Copco, Ingersoll Rand, and Sullair units.
Rotary Sliding Vane Compressors
Maintains low friction and zero varnish on sliding vane slots running under continuous industrial duty.
Reciprocating Air Compressor Crankcases
Superior crankcase lubrication and low carryover into downstream pneumatic piping systems.
High-Pressure Gas Boosting Systems
Maintains seal integrity and resists thermal cracking in multi-stage nitrogen and air boosters.
Batch Quality Control & Standard Verification
Strict five-stage quality checkpoint from raw base oil tank unloading to finished drum sealing.
RPVOT Oxidation Pressure Vessel Test
Guarantees oxidation life exceeding 2,200 minutes per ASTM D2272 for every batch.
Air Release Capability (ASTM D3427)
Air bubbles de-aerated in under 4 minutes to eliminate compressor cavitation.
Moisture Titration (Karl Fischer)
ASTM D6304 verifies moisture content strictly below 30 ppm at packaging.
24-Month Sealed Retention Archive
Retained 1L production samples stored with complete CoA certificates for audit trail.
Export Packaging, Palletization & Container Loadability
Supplied in standard UN 1A1 cold-rolled steel 208L drums (80 drums per 20GP container = 16,640 liters) and 1,000L IBC totes.
Frequently Asked Technical & Procurement Questions
Clarifications on viscosity grades, synthetic formulations, oil drain intervals, and container freight.
Can FOSS Synthetic Compressor Oil achieve a true 8,000-hour drain interval?
Is this oil compatible when switching from mineral compressor oils?
Does this fluid cause swelling of rubber compressor seals?
Request Direct Factory Quotation & Technical Dossier
Receive competitive FOB Xiamen / CIF port container pricing, batch Certificate of Analysis (CoA), and sample dispatch confirmation.