Explore our core formulation lines, meticulously engineered to optimize performance across modern automotive combustion engines, high-speed industrial gearboxes, and state-of-the-art HVAC/R compressor systems.
Under the twin drives of global decarbonization policies and energy efficiency requirements, high-performance synthetic refrigeration lubricants are undergoing a critical evolutionary phase.
In modern industrial, commercial, and automotive climate control setups, the refrigeration compressor is the heart of the system. The longevity, thermodynamic efficiency, and chemical stability of this compressor heavily depend on the chemistry of the lubricants utilized. Air conditioning compressor oils (commonly referred to as A/C compressor lubricants or refrigeration oils) must perform consistently under severe environments: intense heat inside compression chambers, chemical attack by modern refrigerants, and fluctuating high-to-low pressure differentials.
As the international HVAC/R market transitions rapidly from older hydrofluorocarbons (HFCs like R-134a) to new low-GWP alternatives (such as HFOs like R-1234yf, or natural refrigerants like R-744/CO₂ and R-290/Propane), specialized synthetic oil formulation has become highly critical. As a key manufacturing and processing hub globally, China's leading chemical plants have integrated advanced synthesis processes to provide high-purity Polyalkylene Glycol (PAG), Polyol Ester (POE), and Polyvinyl Ether (PVE) oils to global OEMs. Understanding the specific molecular interactions between these base synthetics and modern refrigerants is vital for system designers and procurement directors.
Deciding between various synthetic chemistries requires deep chemical and system compatibility analysis. Here is our engineering breakdown.
| Lubricant Chemistry Type | Common Refrigerant Matches | Hygroscopicity Level | Hydrolysis Vulnerability | Dielectric Resistance | Primary Industrial Use Cases |
|---|---|---|---|---|---|
| PAG (Polyalkylene Glycol) | R-134a, R-1234yf, R-744 (CO₂) | Very High | Extremely Low (Stable) | Low | Automotive belt-driven A/C, HFO transport systems. |
| POE (Polyol Ester) | HFCs (R-410A, R-407C), HFO blends | High | Medium (Can reform acid if wet) | High (Excellent) | Stationary commercial chillers, EV scroll compressors. |
| PVE (Polyvinyl Ether) | HFCs, HFOs (R-32 compatible) | High (but physically bonds water) | Zero (Does not hydrolyze) | High | Residential split systems, VRF commercial HVAC setups. |
| Mineral Oils / Alkylbenzene | HCFCs (R-22), NH₃ (Ammonia) | Low | Zero | Medium | Legacy cooling setups, industrial ammonia food storage. |
1. Miscibility with Refrigerants: Unlike general industrial systems where oil and gas remain strictly partitioned, an A/C loop circulates a mixture of fluid and vapor. High miscibility across the operational temp scale prevents the compressor oil from gathering inside evaporator coils, which would block heat transfer and leave the compressor running dry.
2. Electrical Resistivity (EV Impact): With the shift to Electric Vehicles (EVs) employing hermetic scroll electric compressors, the A/C system oil directly surrounds the electric motor windings. POE and PVE oils are heavily preferred here due to their exceptional dielectric properties, preventing current leaks into the vehicle chassis.
3. Thermal & Chemical Stability: As heat pump configurations operate under rising discharge temps, chemical breakdown or polymerization can clog thermal expansion valves. Synthetic oils utilize unique anti-oxidant, anti-wear (EP), and acid scavenging additives to ensure a 10+ year operational cycle.
Harnessing advanced engineering processes, Shandong Longhai Lubrication Technology provides high-precision fluid formulations worldwide.
Established in 2009, and based out of Zibo, Shandong, Shandong Longhai Lubrication Technology Development Co., Ltd. is a specialized high-tech enterprise covering research, development, custom manufacturing, and global export. Operating over 15 years in the petrochemical sector, we have built a complete upstream-to-downstream industrial system, focusing on providing high-grade lubricants for both transportation and large industrial facilities.
Longhai Technology manufactures its proprietary domestic line "Century Longhai" alongside the globally strategic British "A Ba" premium product range. The comprehensive portfolio features diesel and gasoline engine oils, industrial gear oils, transmission fluids, anti-wear hydraulic oils, engineering machinery lubricants, gas engine oils, antifreeze, automotive urea (DEF), and professional-grade refrigeration/compressor oils.
Every batch produced carries quality assurance backed by the People's Insurance Company of China (PICC), providing our clients with total operational security and risk mitigation.
Our massive industrial plant spans 131 acres, yielding an annual capacity exceeding 200,000 metric tons. Integrated automated production ensures consistent supply to international volume buyers.
Allocating over 5% of annual revenue directly into chemical research, we work closely with key universities and tribology laboratories to innovate eco-friendly formulations.
Automatic blending loops operate on precise metering principles. We achieve a filling accuracy between 1‰ and 2‰ (0.1%-0.2%), while raising filling output rates by 20% to 35%.
Our systems and products are verified by leading international bodies to ensure consistent properties batch after batch.
From heavy-duty logistics to residential climate controls, our lubricants are designed for targeted system demands.
With R-1234yf and R-134a systems dominating passenger cars, we provide premium double-end-capped PAG oils. For electric vehicles (EVs) utilizing heat pump configurations, our high-dielectric POE formulations ensure total electric safety and insulation.
Commercial office and shopping center cooling systems run on scroll or screw compressors. Our high-viscosity POE/PVE products prevent bearing wear under high shear stresses while maintaining high system heat exchange efficiency.
Sub-zero transport requires oils with ultra-low pour points to prevent waxing in thermal expansion valves. Our synthetic oils guarantee fluid flow at down to -50°C, ensuring reliable operation across the food and pharmaceutical supply chain.
The global HVAC/R market is shifting towards low environmental impact alternatives. The transition is moving from high-GWP HCFCs/HFCs to zero-GWP natural refrigerants like R-744 (Carbon Dioxide) and R-290 (Propane). This shift presents new lubrication issues:
Leverage our research expertise and precision production assets to build your own high-value brand.
We work closely with global clients to develop custom-lubricity formulations tailored for specific climate zones, system designs, or target markets. We ensure strict compliance with major international standards including API, ACEA, and specific OEM specifications.
Our packaging facilities accommodate everything from small-scale testing batches to high-volume commercial production. We offer options from 250ml cans for automotive shops up to 1000L IBC totes for industrial factories.
Analyzing viscosity targets and chemical compatibility.
Custom additive blending in our precision labs.
Stress testing under simulated system extremes.
Precision automated production and filling.
Worldwide container shipping with full port clearance.
Take a look inside our advanced blending plant, testing laboratories, and inventory warehouses in Zibo, Shandong.
Technical explanations addressing the key questions from system engineers and procurement managers.
Additional premium lubrication products covering commercial vehicles, industrial hydraulics, and high-performance turbine gear assemblies.
By prioritizing technical innovation and sustainable development, Shandong Longhai collaborates with global distributors to build reliable industrial partnerships. Contact our technical team today for direct bulk pricing, custom formulation development, or to request laboratory data sheets.
"Daring to explore, innovating continuously, surviving by quality, and promoting development by efficiency." We support your market growth with verified product quality, technical documentation, and professional brand support.
Longhai