Rotary screw air compressors serve as the heart of modern industrial automation, providing continuous pneumatic power across manufacturing plants, electronics fabrication, automotive assembly lines, chemical refineries, and energy sectors globally. Unlike reciprocating compressors, rotary screw compressors generate extreme shear forces, high thermal gradients, and intense oxidation environments due to constant oil injection into high-velocity rotor meshes. Consequently, the operational stability, thermodynamic efficiency, and overall lifecycle Total Cost of Ownership (TCO) of compressed air systems depend overwhelmingly on the chemical formulation and physical integrity of specialized screw compressor oils.
In today’s volatile industrial energy market, compressed air accounts for approximately 10% of total industrial electricity consumption worldwide. Up to 75% of a compressor's 10-year lifecycle cost is attributed directly to electrical energy consumption. Inadequate lubrication leads to varnish formation, thermal breakdown, rotor friction loss, elevated discharge temperatures, and costly unscheduled downtime. As global enterprises shift toward carbon neutrality and energy optimization, procurement heads and plant managers are increasingly replacing conventional mineral lubricants with advanced synthetic formulations—specifically Polyalphaolefins (PAO), Polyalkylene Glycols (PAG), and Polyol Esters (POE)—engineered specifically to sustain extended drain intervals (up to 8,000 to 12,000 operational hours) while cutting operational energy drag by 1.5% to 3.5%.
Founded in 2009 and headquartered in Zibo, Shandong, Shandong Longhai Lubrication Technology Development Co., Ltd. spans an expansive manufacturing base of 131 acres. With an annual production capacity exceeding 200,000 metric tons, Longhai represents the pinnacle of modern Chinese lubricant engineering, offering scalable supply security for tier-1 OEMs and global distributors.
Our advanced blending plant utilizes automated high-precision volumetric and gravimetric metering filling equipment. By achieving an ultra-tight metering filling accuracy of 1‰ to 2‰, we eliminate batch variations. Concurrently, our automated filling lines boost production throughput by 20% to 35%, ensuring rapid contract fulfillment and flawless packaging integrity.
Quality is embedded in our corporate ethos. Longhai holds ISO 9001:2015 Quality Management, ISO 14001 Environmental Management, and OHSAS 18001 Occupational Health & Safety Management system certifications. Furthermore, our products have attained prestige credentials, including Mercedes-Benz automatic transmission fluid approval, backed by global underwriting from PICC China People's Insurance Company.
Shandong Longhai Lubrication Technology invests more than 5% of its annual revenue into continuous R&D, collaborating with prestigious national research institutes. Screw compressor oils operate under severe conditions where air and oil are intimately mixed under temperatures reaching 100°C to 110°C at pressure ratios exceeding 10 bar. Formulations must prevent foam buildup, maintain rapid water demulsibility, and resist varnish deposition on rotors.
| Performance Parameter | Group II Mineral Oil | Group III Hydrocracked Synthetic | PAO (Polyalphaolefin) | PAG / POE Premium Synthetic |
|---|---|---|---|---|
| Drain Interval (Hours) | 2,000 - 3,000 hrs | 4,000 - 6,000 hrs | 8,000 - 10,000 hrs | 12,000+ hrs (Extended Drain) |
| Oxidation Stability (RPVOT) | Moderate (<300 mins) | High (600+ mins) | Exceptional (1200+ mins) | Ultra-High (2000+ mins) |
| Varnish & Carbon Tendency | High Risk | Low Risk | Extremely Low | Zero Sludge / Self-Cleaning |
| Flash Point (°C) | 210°C | 230°C | 250°C | 270°C+ |
| Demulsibility (Water Sep.) | Standard | Rapid (<15 mins) | Instant (<10 mins) | Superior Hydrolytic Stability |
High-humidity, non-stop 24/7 continuous air jet loom operation requires screw compressor lubricants with ultra-fast air release, zero foaming, and moisture rejection to prevent water condensation inside compressed air lines.
Cleanroom applications demand silicon-free, low-volatility PAG/POE synthetic oils that eliminate downstream oil carryover, protecting sensitive microchip pick-and-place automation and optics from contamination.
Mobile portable diesel-driven screw compressors operating in dusty, high-ambient desert environments benefit from extreme anti-wear additives (AW) and high Viscosity Index (VI) to maintain oil film thickness at high temperatures.
Screw compressors handling process gases (ammonia, hydrocarbon gas streams) require inert synthetic formulations with minimal gas solubility to prevent oil viscosity dilution and flash-point depression.
Shandong Longhai Lubrication Technology provides end-to-end OEM and ODM manufacturing partnerships for global compressor brands, industrial oil distributors, and regional private labels. Our dual brand model leverages our proprietary flagship brand "Century Longhai" alongside strategic international alignment with the British "A Ba" series.
Specification mapping based on compressor type, climate zone, and OEM warranty standards.
Tailoring viscosity grades (ISO VG 32, 46, 68) with custom additive packages (anti-foam, rust inhibitors).
ASTM lab testing, oxidation stability benchmarking, and real-world rotor wear analysis.
High-speed precision filling (1L to 1000L IBC totes) with customized private label graphics.
Export compliance documentation, COA certificates, and worldwide logistics execution.
Rotary screw air compressors introduce ambient air directly into the lubricating oil stream at high velocity and high thermal states (typically 80°C–110°C). Standard engine or hydraulic oils contain detergent/dispersant systems designed for internal combustion or high ash levels that cause severe foaming, moisture retention, rapid oxidation, and carbon varnish deposits on screw rotors, leading to rotor seizure and premature filter plugging.
Viscosity selection depends on ambient operating temperature, rotor design, and operating pressure. ISO VG 32 is widely used in cold or moderate climates for high-speed small-to-medium screw compressors. ISO VG 46 represents the global industrial standard for general manufacturing plants (operating in ambient temperatures from 15°C to 40°C). ISO VG 68 is specified for extreme heat environments, heavy-duty industrial units, or high-pressure gas compressors to maintain adequate film strength.
While our synthetic screw compressor fluids are rated up to 8,000–12,000 operational hours, actual drain intervals depend on inlet air cleanliness, operating discharge temperature, humidity, and duty cycles. We recommend routine fluid analysis (monitoring TAN, viscosity, and particle count) every 1,000 hours to maximize oil drain intervals safely without risking rotor wear.
Every export consignment from Longhai comes with a Certificate of Analysis (COA) detailing physical-chemical properties tested in our ISO 17025 accredited quality laboratory. Products are insured by PICC China People's Insurance Company, and our operations comply fully with ISO 9001:2015, ISO 14001, and global shipping standards.
Longhai Technology has passed ISO-9001-2015 quality system certification, 14001 environmental management system certification, and 18001 health management system certification. Automatic transmission Mercedes-Benz certification has laid a solid foundation for product stability and enterprise development.
Products are character, quality is life. With technological innovation as our engine and sustainable development as our cornerstone, Shandong Longhai Lubrication Technology Development Co., Ltd. invites global partners to build high-efficiency, reliable industrial lubrication networks.
Longhai