Founded in 2009 in Zibo, Shandong, Shandong Longhai Lubrication Technology Development Co., Ltd. has risen to become a premier high-tech enterprise integrating research and development, manufacturing, and international trade. With over 15 years of industry specialization, we supply robust, specialized lubricating oils that protect critical industrial gears and heavy hydraulic transmissions under extreme pressure and severe mechanical stresses.
Our comprehensive portfolio features our proprietary brand "Century Longhai" alongside the British strategic alliance brand "A Ba" series. Our technical range spans specialized anti-wear hydraulic oil, industrial gear oil, high-temperature diesel engine oil (CJ-4, CK-4), gasoline engine oil, automatic transmission fluid (ATF), and tailored engineering fluids. In testament to our quality commitment, our brand is fully backed by the People's Insurance Company of China (PICC), providing our global wholesale partners with absolute business security.
How Shandong Longhai addresses high-shear, multi-phase boundary lubrication regimes through customized molecular engineering and chemical innovation.
Modern hydraulic gearbox integrations operate under extreme, fluctuating temperature profiles. We utilize highly shear-stable radial polymethacrylates (PMA) and olefin copolymers (OCP) that maintain oil-film integrity under severe hydrodynamic shearing forces. This prevents viscosity degradation, ensuring consistent hydraulic pressure and reliable load-carrying film thickness in high-torque gear tooth interfaces.
For operations utilizing copper or silver-plated metallurgy, conventional Zinc Dialkyl Dithiophosphate (ZDDP) can cause structural chemical corrosion. Shandong Longhai provides customized sulfur-phosphorus ashless additive formulations. These form robust, self-healing tribo-chemical films at high flash temperatures, preventing micro-pitting and gear tooth scuffing without degrading yellow metals.
Water contamination causes acid build-up and metal etching. Our formulated hydraulic gearbox oils feature advanced demulsibility agents that isolate water within minutes, allowing rapid separation during reservoir rest periods. Group II and Group III base oils, combined with sterically hindered phenolic and aminic antioxidants, extend drain intervals by resisting varnish formation and thermal breakdown up to 120°C.
For heavy excavators, draglines, and crushers operating in high-dust and severe impact-load environments. Our lubricants offer extreme load-carrying capacities (FZG Stage 12+), preventing boundary wear under unexpected shock loadings.
Operating under rapid speed transitions and extreme atmospheric temperatures. Our synthetic polyalphaolefin (PAO) gear oils prevent micropitting, control foam build-up, and extend oil service life up to 5-7 years, lowering offshore maintenance overheads.
Advanced hydraulic systems require lubricants with minimal compressible air entrainment. Our products prevent cavitation, preserving precise valve actions and robotic arm positioning in highly automated production lines.
Designed for hydraulic winches, thrusters, and main propulsion gearboxes facing severe saltwater intrusion. Formulated with robust corrosion inhibitors to safeguard internal gear teeth and bearing assemblies.
Shandong Longhai's 131-acre manufacturing center acts as a highly integrated hub of industrial intelligence. Engineered with advanced automated control networks, our facility operates with an annual blending capacity of 200,000 metric tons, allowing us to supply large-scale global wholesale orders on highly compressed timelines.
By replacing standard gravimetric setups with computerized volumetric metering valves, we have increased filling speeds by 20% to 35%. Simultaneously, filling volume accuracy is maintained at a precision threshold of 1‰ to 2‰, ensuring uniform batch sizes and zero packaging product loss.
Multi-tank configurations isolate Group I, Group II, Group III, and synthetic Group IV (PAO) base oils. This avoids chemical cross-contamination, ensuring consistent physical qualities across every batch.
Automated temperature-controlled blending vessels ensure complete dissolution of solid additive packages, eliminating sediment formation and additive dropout.
Our on-site testing facility measures dynamic viscosity, flash points, foam characteristics, and moisture levels before sealing any batch, ensuring complete compliance with ASTM parameters.
From customized fluid chemistry to global shipping logistics, Shandong Longhai offers end-to-end support for international distributors, OEMs, and plant operators.
Adjust wear thresholds, oxidation stability, and pour points to adapt products for extreme climates (arctic environments to desert mining operations) while meeting international API, ACEA, and ISO standards.
We supply lubricants in various packaging sizes, including 1-liter canisters, 4-liter jugs, 18-liter pails, 200-liter steel drums, and IBC containers, matching your exact distribution requirements.
Our in-house design team creates localized labels, handles technical documentation, and designs packaging to help establish your brand's presence in your target market.
We provide full customs support, including MSDS sheets, Certificates of Analysis (COA), export customs clearances, and international freight forwarding across major global ports.
Understand operational specs, viscosity grades, and market demands.
Develop customized base oil and additive formulations in our laboratories.
Rigorous evaluation of wear patterns, thermal limits, and shear resistance.
High-speed automated packaging, blending, and batch inspection processes.
Used-oil analysis, technical training, and supply chain replenishment programs.
Operating a global supply chain requires strict adherence to international quality and environmental management standards. Shandong Longhai holds certifications across key management systems, ensuring our lubricants perform reliably in any industrial setting:
Specifies requirements for our quality management systems (QMS), assuring that every batch of lubricant aligns with our global quality guidelines.
Outlines the framework for our environmental management system (EMS), emphasizing our commitment to energy conservation and clean industrial processes.
Maintains safe production practices across our 131-acre manufacturing facility, ensuring operational continuity and production safety.
Our automatic transmission fluids and industrial gear oils meet various international OEM standards, including Mercedes-Benz certifications.
These certifications show that our manufacturing and testing facilities follow international industry protocols. By selecting Shandong Longhai, industrial operators gain access to certified lubricants that meet demanding operational requirements and equipment compliance standards.
Detailed engineering answers to help select, maintain, and optimize industrial hydraulic gearbox oils.
Anti-wear (AW) hydraulic oils are formulated to transfer hydraulic power under high pressures while preventing metal-to-metal wear in precision pumps. They feature excellent shear stability and water demulsibility. Industrial gear oils are designed to handle high loads on gear teeth, containing extreme pressure (EP) additives that prevent micro-pitting, gear tooth scuffing, and wear under boundary lubrication conditions.
A higher Viscosity Index indicates that the lubricant's viscosity is less affected by temperature fluctuations. In combined hydraulic gearbox configurations, the oil must remain fluid enough for cold startups while maintaining sufficient film thickness to protect loaded gears at elevated operating temperatures. Shandong Longhai formulations utilize high-VI base oils to ensure reliable protection across wide temperature ranges.
Conventional Zinc Dialkyl Dithiophosphate (ZDDP) additives can react with copper, brass, and silver alloys under elevated temperatures, potentially causing chemical corrosion in parts like piston pump slippers. For systems containing these yellow metals, Shandong Longhai supplies ashless, zinc-free anti-wear oils to ensure reliable performance and material compatibility.
Our gear oils are formulated with active sulfur-phosphorus additives that react with metal surfaces under extreme pressure, forming a protective sacrificial layer. This chemical barrier prevents asperities on gear tooth profiles from welding and shearing, mitigating micropitting to extend gear service life.
Water contamination reduces oil film strength, promotes foaming, accelerates oxidation, and causes rust. Shandong Longhai's formulations contain demulsifiers that rapidly separate water from the oil, allowing the water to be drained from the reservoir and maintaining the oil's protective properties.
Synthetic lubricants (such as PAO-based formulations) provide improved thermal and oxidation stability, a higher natural viscosity index, and better low-temperature fluid characteristics. They reduce friction, lower operating temperatures, and can extend oil drain intervals by 2 to 4 times compared to conventional mineral oils.
Partner with Shandong Longhai for high-performance lubricant formulations, packaging options, and support from our technical R&D department. Let's work together to improve your system efficiency and reduce operational downtime.
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