Explore our elite grade industrial formulation range engineered for heavy-duty applications and thermal stability.
Within high-performance thermodynamics, refrigeration oil is not merely a lubricant; it is a critical system component. In modern industrial HVAC/R (Heating, Ventilation, Air Conditioning, and Refrigeration) configurations, the selection of refrigeration lubricants determines the longevity, energy efficiency, and operational safety of the entire thermal loop. Unlike general-use motor oils, specialized refrigeration oil must co-exist seamlessly with gaseous and liquid chemical refrigerants under extreme, fluctuating pressure differentials and vast temperature ranges.
As the global market transitions from ozone-depleting substances (ODS) and high Global Warming Potential (GWP) fluorocarbons to advanced synthetics and natural alternatives, the chemical formulation of refrigeration oil has undergone a paradigm shift. Shandong Longhai Lubrication Technology Development Co., Ltd. has established itself at the forefront of this industrial transformation. From our state-of-the-art production base in Zibo, Shandong, we manufacture advanced lubricant lines engineered to resist chemical breakdown, maintain precise kinematic viscosity, and facilitate optimal system efficiency.
By blending top-tier synthetic base stocks—such as Polyol Esters (POE), Polyalkylene Glycols (PAG), Polyvinyl Ethers (PVE), and refined Alkylbenzenes (AB)—with high-stability additive packages, our refinery meets the stringent requirements of modern screw, scroll, reciprocating, and rotary compressors. We help global industrial operations mitigate friction, maximize heat exchange parameters, and eliminate critical system failures caused by lubricant starvation or wax precipitation.
The global HVAC/R landscape is adapting rapidly to regulatory mandates, resulting in significant formulation updates.
International environmental regulations, including the Kigali Amendment and EU's F-Gas legislation, are phasing out traditional Hydrofluorocarbons (HFCs) like R404A and R134a. This has driven the industry toward Hydrofluoroolefins (HFOs) and natural alternatives (R744, R717, R290). This chemical transition demands high-stability POE and PAG oils to prevent oil-refrigerant phase separation at low temperatures.
Carbon Dioxide (R744) has emerged as the premier eco-friendly refrigerant for commercial retail supermarkets. Operating under transcritical pressures up to 120 bar requires lubricants that resist rapid dilution and maintain thick hydrodynamic lubrication film layers under high load, a challenge solved by our custom-formulated synthetic Polyol Esters.
Modern HVAC/R system designs focus heavily on energy conservation. OEMs (Original Equipment Manufacturers) are shifting toward lower ISO viscosity grades (such as ISO VG 32 or 46 rather than 68 or 100) to minimize viscous drag inside the compressor. This shift requires high viscosity index (VI) base oils that do not thin out dangerously at high temperatures.
Industrial procurement teams face unique technical challenges when sourcing compressor lubricants internationally.
Global procurement offices do not simply buy oil; they manage risk. Sourcing refrigeration lubricants from an international manufacturer requires verification of chemical consistency, certification compliance, and supply chain security. Critical parameters like ultra-low moisture content (typically < 50 ppm) are vital, as trace water in a POE system causes hydrolysis, breaking the oil down into organic acids that corrode copper and damage compressor motor windings.
Furthermore, chemical compatibility must be verified through standardized testing protocols, such as the ASHRAE 97 sealed tube test. This test verifies that the selected lubricant, refrigerant, and compressor structural materials (elastomers, insulation, and copper) do not react negatively over time. Our R&D center conducts these analyses to ensure batch-to-batch consistency for every shipment.
Longhai Technology minimizes supply chain disruption by managing the entire process, from base oil sourcing to final blending, quality control, and shipping documentation. We support our global clients with comprehensive technical datasheets (TDS), safety datasheets (SDS), and compliance documentation to ensure smooth import operations and reliable performance.
Shandong Longhai Lubrication Technology: Built on a foundation of technology and quality control.
About Us: Shandong Longhai Lubrication Technology Development Co., Ltd. was established in 2009 and is headquartered in Zibo, Shandong. It is a high-tech enterprise integrating R&D, production and sales. The company has been deeply involved in the lubricant industry for more than 15 years, has built a complete industrial chain system, and is committed to providing high-quality lubrication solutions for the global industrial and transportation fields.
As a reliable lubricant manufacturer in the industry, Longhai Technology owns its own brand "Century Longhai" and the international strategic cooperation brand British "A Ba" series of products. The products cover diesel engine oil, gasoline engine oil, gear oil, hydraulic transmission oil, anti-wear hydraulic oil, special engine oil for engineering machinery, special oil for natural gas, full synthetic oil, automotive urea solution, antifreeze, special engine oil for motorcycles, industrial oil, automatic transmission oil and many other lubricant varieties. The brand is insured by PICC China People's Insurance Company and quality insurance.
Our Zibo production facility operates with advanced automation technology, utilizing precise batch blending and closed-loop filtration systems to ensure high quality standards. Our fully integrated process minimizes external environmental exposure, ensuring the high purity required for specialized refrigeration applications.
Delivering advanced lubrication solutions since 2009.
131-acre high-tech manufacturing base supporting global demand.
Automated volumetric metering lines ensure exact volume control.
Continuous investment in research and technological development.
Our commitment to international quality standards is backed by globally recognized certifications.
Qualification Certificate: The company 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 the foundation for the healthy development of the company and the stability of product quality. The company strictly follows international standards and introduces advanced production processes and testing technologies to ensure that the products perform reliably under demanding working conditions, helping customers maintain equipment efficiency and reduce maintenance costs.
Our quality control laboratory is equipped to test key parameters, including: kinematic viscosity at 40°C and 100°C (ASTM D445), water content by Karl Fischer titration (ASTM D6304), total acid number (ASTM D974), pour point (ASTM D97), flash point (ASTM D92), and copper corrosion strip test (ASTM D130). This rigorous testing helps ensure every batch meets required specifications.
Our refrigeration and industrial lubricants are engineered to perform reliably across diverse commercial and industrial settings.
Refrigerated transport systems require lubricants that remain fluid at ultra-low evaporator temperatures while protecting the compressor during rapid cycles. Longhai synthetic lubricants prevent wax flocculation and oil trapping in capillary tubes, maintaining efficient heat transfer across refrigerated fleets.
Large-scale ammonia (R717) or CO2 (R744) installations require chemically stable lubricants to avoid sludge formation. Our low-carryover synthetic formulas keep the evaporators oil-free, helping process plants optimize energy use and reduce maintenance downtime.
Mobile air conditioning (MAC) systems using R134a or HFO-1234yf demand specialized lubricants like double end-capped PAGs. These formulas offer excellent wear protection and thermal stability within compact, high-RPM vehicle scroll compressors.
We provide end-to-end custom formulation and packaging services tailored to specific target markets.
We design fully synthetic and semi-synthetic lubricant formulations tailored to specific vehicle and equipment requirements, climate conditions, or market positioning to meet international standards such as API, ACEA, and OEM specifications.
Our operations support production runs from small-scale trials to high-volume manufacturing, covering engine oils, transmission fluids, industrial lubricants, and specialized compressor oils with flexible packaging options.
Our production facilities are certified under ISO 9001, 14001, and 18001 standards. We provide comprehensive laboratory reports to ensure product performance, traceability, and regulatory compliance.
We provide full-service support including custom packaging design, container options, label printing, and technical documentation to help establish and strengthen your brand's market presence.
Our standard business process ensures efficiency and clarity at every stage of partnership.
Demand Analysis
Formula Development
Sample Testing
Production Delivery
After-Sales Support
Technical answers to common engineering questions regarding refrigeration oil selection and maintenance.
A visual look at our 131-acre manufacturing facilities, laboratory equipment, and material storage.
Why global HVAC/R industrial leaders partner with Shandong Longhai Technology.
Advanced Blending and Filling Infrastructure: Our production line utilizes volumetric metering blending, suitable for formulating a wide variety of lubricating oils with a filling accuracy of 1‰-2‰. While maintaining this precision, our automated lines increase filling speed by 20%-35%, improving operational efficiency and supporting consistent delivery times.
Strong Focus on R&D: Shandong Longhai Lubrication Technology invests over 5% of its annual revenue back into research and development. We collaborate with universities and chemical research institutes to test and refine our lubricant formulations for evolving industry demands.
Extensive Sales and Support Network: Longhai Technology has established a distribution network covering 139 cities across 29 provinces in China, alongside growing export operations to international markets. Our customer-centric approach is built on reliable technical support and consistent product quality.
Get in touch with our engineering team for custom formulation testing and volume pricing.
Contact Us Today →A complete selection of specialty formulation oils designed for industrial compressors, engines, and heavy gearboxes.
Longhai
