Engineered to ensure maximum wear protection, thermal stability, and operational efficiency across demanding industrial and transport applications.
Shandong Longhai Lubrication Technology Development Co., Ltd., established in 2009 and headquartered in Zibo, Shandong, stands as a prominent high-tech industrial enterprise. Spanning an expansive 131 acres, we integrate advanced R&D, precision manufacturing, and strategic international distribution.
With an annual blending capacity exceeding 200,000 tons, our products support heavy industries, transport operations, and manufacturing plants worldwide. We own the domestic brand "Century Longhai" and hold a strategic partnership with the British "A Ba" series, with all products insured under PICC Quality Insurance.
An in-depth look at chemical formulations, mechanical dynamics, and performance standards of next-generation anti-wear hydraulic fluids.
Anti-wear hydraulic oils are formulated to prevent direct metal-to-metal contact in pumps, valves, and actuators. The selection of anti-wear chemistry heavily impacts both machinery life and environmental footprint. Historically, Zinc Dialkyldithiophosphate (ZDDP) has been the cornerstone additive. ZDDP forms a protective sacrificial boundary layer on metal surfaces under high heat and pressure. This protective boundary protects vital components from micro-welding, scuffing, and fatigue.
For modern environments, particularly in eco-sensitive marine applications or advanced CNC operations, Ashless (Zinc-Free) Anti-Wear Hydraulic Oils are increasingly preferred. Ashless technologies utilize sulfur-phosphorus organic molecules that prevent thermal oxidation and hydrolytic breakdown. Additionally, they prevent the corrosion of yellow metals (copper, bronze, brass) found in axial piston pump plates, improving system lifespan without leaving metallic ash residues.
A hydraulic system operates as an incompressible energy transfer medium. However, real-world operation exposes the fluid to shear stress, water contamination, and air entrainment. Our formulations address these vulnerabilities:
Industrial components demand compliance with strict standards. Our high-performance anti-wear hydraulic oil meets or exceeds major international specifications, ensuring seamless deployment in global equipment fleets:
The European benchmark for HLP (Part 2) and HVLP (Part 3) hydraulic oils.
Global specifications outlining the minimum criteria for mineral-based hydraulic fluids.
Validates performance under extreme hydraulic pump testing conditions.
The gold standard for dry/wet pump tests, verifying yellow metal compatibility.
Optimizing operations globally, from heavy industrial zones to extreme environments.
Excavators, dump trucks, and continuous miners operate in dust-laden, high-load, and variable temperature conditions. Our heavy-duty formulations prevent pump wear and maintain consistent viscosity, even during long shifts in extreme environments.
Operating round-the-clock under pressures exceeding 3,000 PSI, precision injection molding requires fluid with minimal thermal degradation. Our oils reduce deposit formation on servo-valves, helping to maintain machine accuracy and minimize downtime.
Deck machinery, steering gear, and winches face salty atmospheres and water splash. Formulated with robust anti-rust agents, our hydraulic transmission fluids protect internal components from saltwater-induced corrosion.
Comprehensive custom manufacturing for national brands, distributors, and large industrial users.
Fully synthetic, semi-synthetic, and mineral formulations developed to meet specific viscosity targets, OEM approvals, and climate conditions.
Filling capacity ranging from 1-liter bottles for retail to 18-liter pails, 200-liter drums, and large IBC tanks, configured to your brand layout.
Each batch is backed by comprehensive COA (Certificate of Analysis) laboratory verification, aligned with ISO 9001 and ISO 14001 guidelines.
Located in Zibo, Shandong, near major ports, ensuring reliable shipping, customs clearance, and global supply chain support.
1. Technical Request & Analysis
2. Formulation Dev & Lab Optimization
3. Sample Verification & Testing
4. Mass Blending & Packaging
5. Quality Inspection & Logistics
Our quality system is verified by international standard frameworks, ensuring consistency and performance under demanding working conditions.
Our facility has passed ISO 9001-2015 quality system certification, ISO 14001 environmental management system certification, and ISO 45001 (formerly 18001) occupational health management system certification. We have also earned automatic transmission fluids certification from Mercedes-Benz. By combining imported raw materials with strict quality control, we ensure our fluids perform consistently under high-temperature and high-pressure conditions.
Driving efficiency, sustainability, and technological integration for heavy machinery.
As global industries commit to carbon reduction targets, Shandong Longhai is actively researching and developing next-generation fluid formulations:
Expert answers to common queries regarding selecting, application, and maintaining anti-wear hydraulic fluids.
Selection depends on the equipment's operating temperature and start-up conditions. ISO VG 32 is suited for colder environments or high-precision, high-speed applications. ISO VG 46 is the standard choice for general industrial machinery operating in moderate climates. ISO VG 68 is recommended for high-load, high-temperature operations, providing thicker lubricant films to protect components under heavy stress.
Standard hydraulic oil focuses primarily on transmitting power, containing rust and oxidation inhibitors. Anti-wear (AW) hydraulic oil includes specialized anti-wear additives (such as ZDDP or sulfur-phosphorus complexes) that form a protective film on load-bearing components, preventing metal-to-metal friction under high-pressure conditions.
Replacement schedules vary based on operational environment, oil quality, and filtration systems. Generally, mineral-based hydraulic oils should be tested every 1,000 to 2,000 hours, or at least once a year. Regular oil analysis monitors parameters like acid number, viscosity change, moisture level, and particle counts to determine the optimal drain interval and prevent unexpected downtime.
Mixing zinc-free and zinc-containing fluids is generally not recommended. Doing so can disrupt the additive balance, potentially leading to precipitation, clogged filters, and reduced anti-wear performance. If transitioning your system to ashless fluids, a complete system drain, flush, and refill are recommended to ensure optimal performance.
Verify that the oil meets international standards, such as DIN 51524 (Part 2 or 3), ISO 11158, and specific OEM approvals like Parker Denison HF-0 and Eaton E-FDGN-TB002-E. Shandong Longhai manufactures products to meet these international specifications, with all batches verified by our ISO 9001:2015 certified laboratory.
Water contamination can cause additive breakdown (hydrolysis), fluid oxidation, sludge formation, and steel component corrosion. It also increases the risk of pump cavitation, leading to severe component wear. Our hydraulic fluids are formulated with advanced demulsifiers to rapidly separate water, making it easy to drain from the reservoir.
Optimize your industrial fluid performance, request custom blending formulations, or partner with us for global distribution. Our team provides responsive technical support, tailoring solutions to meet your specific application requirements and operational challenges.
"Products are character, quality is life, customer first, honest and pragmatic service tenet."
— Shandong Longhai Executive PhilosophyCollaborating with research institutes to continuously optimize fluid formulations.
Serving industrial distributors in 139 cities and global shipping ports.
Our facilities feature advanced automated blending systems, high-speed metered filling lines, and modern quality assurance laboratories. We maintain a high level of process control to ensure consistent batch quality for our partners worldwide.
Explore our wide range of automotive, transport, industrial gear, and specialty lubricants.
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