Technical Requirements and Selection of Hydraulic Oil Compound Additives for Construction Machinery|News|UNPChemicals

March 10, 2026

Technical Requirements and Selection of Hydraulic Oil Compound Additives for Construction Machinery

1. What is a hydraulic oil additive package?

Hydraulic oil compound additive is a composite additive product formed through scientific compounding and optimized compatibility of multiple functional single additives according to a precise formulation system. It is the core functional component for hydraulic oil to achieve various core performances. Different from single-functional additives, hydraulic oil compound additives can endow base oil with a full set of performances such as anti-wear, anti-oxidation, anti-rust and anti-corrosion, anti-emulsification, anti-foaming, air release, and detergency and dispersancy in one go, solving industry pain points such as compatibility conflicts, difficulty in controlling additive dosage, unbalanced performance, and complex blending processes when using single additives. It is currently the core raw material for the production of industrial and construction machinery hydraulic oil.

The performance of hydraulic oil compound additives directly determines the quality grade, working condition adaptability, and service life of hydraulic oil. Especially for the hydraulic systems of construction machinery with complex working conditions and high load intensity, the selection of special hydraulic oil compound additives directly affects the operational stability of hydraulic components, equipment maintenance costs, and operational safety.

UNPChemicals is a professional supplier with years of deep involvement in the hydraulic oil additive industry, specializing in the research, development, production, and supply of high-quality, high-performance hydraulic oil additive products.Relying on strict R&D control standards and a vast amount of real-world operating condition testing and verification, the enterprise has established a full range of hydraulic oil additive product systems covering different application scenarios and performance levels. The core products include mainstream models such as the high-zinc anti-wear hydraulic oil compound UNP AH502A, the low-zinc anti-wear hydraulic oil compound UNP AH502B, and the ashless anti-wear hydraulic oil compound UNP AH502C, which can fully meet the differentiated performance requirements of construction machinery hydraulic systems and provide stable and reliable additive solutions for lubricant manufacturers, construction machinery maintenance service providers, and original equipment supporting manufacturers.

2. Special Requirements for the Compound Agent in Terms of Water Resistance, Pollution Resistance, and High Load Capacity

Construction machinery operates outdoors for extended periods in uncontrolled environments such as infrastructure construction sites, mines, and sand and gravel yards. Compared with industrial hydraulic systems with stable operating conditions and controllable environments, its hydraulic system has long been facing three core operating condition challenges: water intrusion, excessive pollutants, and high-load impact. These challenges impose specialized technical requirements on hydraulic oil additives that far exceed those of ordinary industrial hydraulic oil additives, as follows:

(1) Special technical requirements for water resistance performance

Water ingress into the hydraulic system can be caused by various factors, including water wading operations of construction machinery, construction in rainy weather, and condensed water generated by the temperature difference between day and night. Under operating conditions where the water content exceeds the standard, ordinary industrial hydraulic oil additives are highly prone to problems such as emulsification, hydrolysis and failure of additives, oil film rupture, and metal corrosion, ultimately leading to malfunctions such as hydraulic pump wear, valve block jamming, and system leakage. In response to the water ingress risk of construction machinery, special hydraulic oil additives need to meet the following core technical requirements:

Excellent water separation and anti-emulsification performance: It shall meet the standard requirements of GB/T 7305 "Determination of water separability of petroleum oils and synthetic fluids". The special compound additive for construction machinery shall achieve, under the test condition of 54°C, that the volume ratio of oil-water separation within 30 minutes is not less than 90%, and the volume of separated water is not more than 3 mL, ensuring rapid oil-water separation after water ingress and avoiding overall emulsification of the oil.
Excellent hydrolytic stability: It is required to pass the test of SH/T 0301 "Determination Method for Hydrolytic Stability of Hydraulic Oil" to ensure that the core functional components such as anti-wear agents and anti-rust agents in the compound additive do not undergo hydrolysis and decomposition under high-temperature conditions in the presence of water, do not generate acidic substances and insoluble matter, and avoid performance degradation and filter element blockage.
Performance retention rate in the presence of water: Under extreme operating conditions where the water content reaches 0.5%, the attenuation rate of the anti-wear and anti-rust performance of the compound agent shall not exceed 15%, ensuring stable protection of hydraulic components even under water-exposed operating conditions.
Water Erosion Resistance and Rust Prevention Performance: The rust prevention components can form a stable adsorbed protective film on the metal surface, which will not be washed away by intruding moisture. It can pass the test of Method B (seawater working condition) of GB/T 11143 "Test Method for Rust Prevention Performance of Inhibited Mineral Oils in the Presence of Water", with no rusting phenomenon.

(2) Special technical requirements for anti-pollution performance

Dust, sediment, and metal debris in the working environment of construction machinery can enter the hydraulic system through components such as breather valves and cylinder seals. Even when equipped with a high-precision filtration system, there will still be a large amount of micron-sized solid contaminants. Ordinary compound additives are prone to problems such as insufficient detergency and dispersibility, filtration failure, and reduced anti-wear performance under contaminated working conditions. In response to the high pollution risk of construction machinery, special hydraulic oil compound additives need to meet the following core technical requirements:

Excellent detergency and dispersancy properties: Capable of stably suspending metal wear debris, dust particles, and sludge oxidation products in the oil within the system, preventing them from depositing on critical components such as valve group orifices, pump body friction pairs, and cylinder inner walls, thus avoiding valve group jamming and intensified local wear, and ensuring precise operation of the hydraulic system.
Strict filtration performance requirements: Must pass the ISO 13357 hydraulic oil filterability test, especially under contaminated conditions with a water content of 0.5%, it can smoothly pass through a 3μm high-precision filter element, with a filtration time not exceeding 300s, no flocculent precipitate formation, no filter element clogging, and is compatible with high-pressure and high-precision filtration systems of construction machinery.
Anti-wear stability under polluted conditions: Under operating conditions where solid particle pollution exceeds the standard, the anti-wear components of the compound agent can preferentially adsorb on the surface of the metal friction pair, forming an isolation protective film, reducing the aggravating effect of abrasive wear, and preventing scratches and gluing failure on the surface of the friction pair.

(3) Special technical requirements for high-load operating conditions

Hydraulic systems of construction machinery generally operate under high pressure, high-frequency impact, and variable load conditions. The peak pressure of hydraulic systems in equipment such as excavators and cranes can reach 35-42 MPa, far exceeding the 16-25 MPa operating pressure of ordinary industrial hydraulic systems. Frequent impact loads can easily lead to the failure of boundary lubrication in friction pairs, resulting in adhesive wear and fatigue spalling. To address the high load conditions of construction machinery, special hydraulic oil additives must meet the following core technical requirements:

Extreme anti-wear performance: It must pass the international mainstream hydraulic pump bench tests, including the 100-hour bench tests of Denison T6C and T5D vane pumps, the tests of Vickers V104C and 35VQ25 vane pumps, and the test of Bosch Rexroth A10VSO axial piston pump. After the tests, the wear amount of pump body components must be far lower than the national standard limit to ensure stable lubrication of friction pairs under high-pressure conditions.
Excellent extreme pressure and anti-impact performance: It must pass the test of GB/T 19934 "Hydraulic fluid lubricants - Determination of anti-wear performance - Four-ball machine method", with the maximum non-seizure load PB value not less than 900N, and at the same time pass the FZG gear machine test to reach level 12 or above, which can withstand the instantaneous impact loads during shoveling, hoisting, and excavation operations, preventing the friction pair from experiencing gluing and sintering failures.
Oil Film Strength under High Load: The anti-wear components in the compound can form a lubricating oil film with uniform thickness and shear stability under high-pressure boundary lubrication conditions. The rupture load of the oil film far exceeds the system peak pressure, ensuring that the metal friction pairs are always in an isolated state and reducing wear.
Anti-fatigue wear performance: It can effectively reduce fatigue cracks and spalling on metal surfaces under high-frequency variable load conditions, and extend the fatigue life of core components such as hydraulic pumps, hydraulic motors, and bearings.

III. Recommendations for Hydraulic Oil Compound Agents for Excavators/Loaders/Cranes

Different types of construction machinery have significant differences in the structure of their hydraulic systems, operating condition characteristics, and performance requirements, necessitating the targeted selection of suitable hydraulic oil compound additives. The specific recommendations are as shown in the following table:

Equipment Type	Characteristics of Core Operating Conditions	Recommended compound model	Core Adaptation Advantages
Overloaded Mining/Infrastructure Excavator	System pressure ranges from 30 to 42 MPa, with high-frequency impact loads, severe wading and high dust pollution, continuous operation duration exceeding 3,000 hours throughout the year, and compatibility with multiple types of components such as high-pressure piston pumps, multi-way valves, and hydraulic motors	UNP AH502A High-Zinc Anti-Wear Hydraulic Oil Compound Additive	The high-zinc formulation features outstanding anti-wear performance, passing all items of the Denison T6C and Vickers V104C pump tests, with wear far below the national standard limit; excellent water separation and hydrolysis stability, with a low performance decay rate under water-exposed working conditions; excellent detergency and dispersibility, suitable for high-dust mine working conditions, fully meeting the original oil standards of mainstream excavator brands such as SANY, XCMG, LIUGONG, Caterpillar, and Komatsu.
Coastal high humidity/environmental protection requirement excavator	Coastal high salt fog and high humidity working conditions have high requirements for the compatibility, environmental friendliness, and long-term effectiveness of seals, while precision hydraulic systems have strict requirements for filtration	UNP AH502B Low-Zinc Anti-Wear Hydraulic Oil Compound Additive	Low zinc formulation, with excellent compatibility with sealing components such as nitrile rubber and fluororubber, reduces system leakage; outstanding hydrolysis resistance and rust prevention performance, can pass the seawater rust prevention test, suitable for coastal high salt fog working conditions; excellent oxidation stability, oil change interval extended by 30% compared to ordinary formulations, meeting the long-term oil requirements of imported brand excavators
High-end precision hydraulic system excavator	Imported high-end models, with the hydraulic system equipped with high-precision filter elements, have extremely high requirements for oil cleanliness, filterability, and oxidation resistance, and are suitable for extremely complex working conditions	UNP AH502C Ashless Anti-wear Hydraulic Oil Compound	Ashless formulation, free of metal salts, no flocculent precipitate formation under extreme water ingress conditions, excellent filtration performance; outstanding thermal oxidation stability, RBOT rotary oxygen bomb test time exceeding 600 minutes, excellent long-term antioxidant performance; balanced high and low temperature performance, adaptable to complex operating conditions in different regions worldwide
Regular Infrastructure/Sand and Gravel Quarry Loader	Frequent shoveling and lifting operations, large impact loads, system pressure of 20-30 MPa, severe dust pollution, some models share the same oil for hydraulic and transmission systems, with high requirements for seal compatibility and anti-wear performance	UNP AH502A High-Zinc Anti-Wear Hydraulic Oil Compound Additive	The high-zinc formula has excellent impact resistance, suitable for variable load conditions during frequent shoveling and loading operations; it has outstanding detergency and dispersibility, which can stably suspend dust particles and prevent the multi-way valve from jamming; it has excellent water separation performance, suitable for outdoor operations in rainy days, and fully meets the oil standards of mainstream loader brands such as Longgong, Lingong, Xugong, and LIUGONG.
Loader with long-acting oil change requirement	Large-scale leased equipment and models for long-term continuous operation have high requirements for oil change intervals and oil stability	UNP AH502B Low-Zinc Anti-Wear Hydraulic Oil Compound Additive	The low-zinc formulation has excellent oxidation stability, with extremely low sludge formation during long-term use; the additive dosage is optimized, and the overall blending cost is controllable; it has good compatibility with seals, reducing the risk of leakage during long-term use, and is suitable for long-life oil change requirements.
Automobile Crane/Crawler Crane under Normal Working Conditions	The luffing, telescoping, and hoisting multi-mechanism hydraulic drive system has a system pressure of 25-35 MPa, with large load fluctuations, extremely high requirements for operation stability and safety, and strict requirements for the anti-foaming and air release properties of the oil	UNP AH502B Low-Zinc Anti-Wear Hydraulic Oil Compound Additive	The low-zinc formulation has excellent oxidation stability, with no sludge deposition during long-term use, eliminating safety risks caused by valve group jamming; its anti-foaming and air release properties meet the superior product standards of GB 11118.1, preventing system cavitation and crawling during high-altitude operations, ensuring precise and stable hoisting operations, and being compatible with the oil standards of mainstream crane brands such as XCMG, SANY, and Zoomlion.
Crane for Extreme Temperature Difference/High Cold Regions	When operating in northern winters or high-altitude areas, where there is a large environmental temperature difference, high requirements are placed on the high and low temperature performance and cold start anti-wear properties of oil products	UNP AH502C Ashless Anti-Wear Hydraulic Oil Compound	The ashless formulation has no precipitation at low temperatures, exhibits excellent compatibility with low-viscosity hydrotreated base oils and PAO base oils, and is suitable for extreme low-temperature cold start conditions at -40°C; it has outstanding high-temperature oxidation resistance, high viscosity index retention, stable performance under large temperature difference conditions, and can comprehensively ensure the safety of hoisting operations in extreme environments.

4. How to Select Hydraulic Oil Compounding Agents under High-Temperature and Severe Cold Conditions

The operating scope of construction machinery covers different climate regions across the country. Working conditions such as high temperatures in southern summers, severe cold in northern winters, enclosed high temperatures in underground mines, and extreme temperature differences on plateaus impose extreme requirements on the performance of hydraulic oil compound additives. Improper selection can directly lead to equipment startup failures, rapid wear of components, and premature failure of the oil. The specific selection rules are as follows:

(1) Selection of Hydraulic Oil Compound Additives under High-Temperature Conditions

High-temperature working conditions mainly include scenarios such as continuous outdoor operations in southern summers, operations in confined spaces in mines, and 24-hour continuous operation of equipment at full load. Under such conditions, the oil temperature of the hydraulic system remains above 80°C for a long time, with peak oil temperatures reaching 100-120°C. High-temperature environments can cause the oxidation rate of base oil to increase exponentially, additives to decompose and become ineffective rapidly, a large amount of sludge and varnish to form, and seals to age and harden, ultimately leading to failures such as system leakage, component wear, and valve block jamming.

The selection of hydraulic oil compound additives under high-temperature conditions must strictly follow the following core principles:

Prioritize formulations with high thermal oxidation stability : Must pass the test of GB/T 12581 "Determination of Oxidation Characteristics of Inhibited Mineral Oils (Rotating Bomb Oxidation Test)", with an RBOT time of not less than 300 minutes. For long-term high-temperature operating conditions, formulations with an RBOT time exceeding 600 minutes should be selected to ensure that additives do not decompose and base oils do not oxidize at high temperatures, effectively controlling sludge formation.
Key verification of high-temperature anti-wear performance retention rate : It is necessary to pass the four-ball machine test and FZG gear machine test under high-temperature conditions of 120°C to ensure that the attenuation rate of anti-wear performance at high temperatures does not exceed 20%, the wear amount of the friction pair meets the standard requirements, and to avoid wear failure caused by the decrease in oil film strength at high temperatures.
Strictly control high-temperature anti-foaming and air release performance: Under high-temperature conditions, oil is more likely to produce bubbles. Therefore, it is necessary to select a compound additive with a high-temperature-resistant anti-foaming system to ensure that anti-foaming components do not precipitate or become ineffective at high temperatures, meet the superior product standards of GB/T 12579 "Determination of Foaming Characteristics of Lubricating Oils" and SH/T 0308 "Determination of Air Release Value of Lubricating Oils", and avoid system cavitation and pressure fluctuations.
Verify the high-temperature compatibility of seals: It is necessary to pass the seal immersion test under high-temperature conditions of 100°C to ensure that the volume change rate of commonly used seals such as nitrile rubber and fluororubber is controlled within ±10%, the hardness change does not exceed 10 Shore A, and to avoid leakage caused by seal aging and contraction at high temperatures.

Selection Recommendations for High-Temperature Working Conditions: Prioritize the selection of UNP AH502B Low-Zinc Anti-Wear Hydraulic Oil Additive Package and UNP AH502C Ashless Anti-Wear Hydraulic Oil Additive Package. The thermal oxidation stability of both products is significantly superior to that of conventional high-zinc formulations, with a low decomposition rate of additives and less sludge formation at high temperatures. Among them, the RBOT rotary oxygen bomb test time of the UNP AH502C ashless formulation can reach over 600 minutes, making it suitable for long-term high-temperature and heavy-load working conditions above 100°C, and the oil change interval is extended by over 50% compared to ordinary formulations.

(2) Selection of Hydraulic Oil Compound Additive under Severe Cold Conditions

Severe cold conditions mainly include scenarios such as outdoor operations in winter in Northeast and Northwest China, construction in high-altitude and extremely cold regions, etc., where the ambient temperature remains below -20°C for a long time, and the extreme low temperature can reach -40°C. The severe cold environment will cause the viscosity of oil products to increase sharply, the fluidity to decrease significantly, the cold start of the hydraulic system to be difficult, and the effective lubricating oil film cannot be formed in a timely manner during the cold start phase. At the same time, additives are prone to precipitate from the base oil, causing filter element blockage, slow system pressure build-up, malfunction of actions, and even dry grinding damage.

The selection of hydraulic oil compound additives under severe cold conditions must strictly follow the following core principles:

Prioritize low-temperature, non-precipitating formulations : Must pass the -40°C low-temperature storage stability test, with no crystallization, no flocculent precipitates, and no delamination after 72 hours of storage. At the same time, pass the ISO 13357 low-temperature filterability test to ensure smooth passage through high-precision filter elements at low temperatures without causing system blockages.
Key verification of cold start anti-wear performance : It is necessary to pass the boundary lubrication performance test under -30°C low temperature conditions to ensure that the anti-wear components can quickly adsorb on the surface of the metal friction pair at the moment of cold start, form an effective protective film, avoid dry grinding wear, and meet the cold start lubrication requirements of low-viscosity base oils.
Ensure compatibility with low-viscosity base oils : In severe cold conditions, low-viscosity base oils such as ISO VG22 and VG32 are commonly used. It is necessary to select a compound additive that can maintain stable performance across all aspects in low-viscosity base oils to avoid the degradation of anti-wear, anti-rust, and anti-emulsification properties at low viscosities.
Verify low-temperature rust prevention and anti-emulsification performance: In severe cold conditions with large temperature differences between day and night, condensate water is likely to form. It is necessary to ensure that the compound agent still maintains excellent water separation and rust prevention performance in low-temperature environments, preventing rust problems after long-term system shutdown.

Selection Recommendations for Severe Cold Conditions: Prioritize the selection of UNP AH502C Ashless Anti-wear Hydraulic Oil Additive Package and UNP AH502B Low-Zinc Anti-wear Hydraulic Oil Additive Package. Both products exhibit excellent compatibility with hydrocracked base oils and PAO synthetic base oils, with no precipitation at low temperatures, and can be adapted to extreme low-temperature conditions of -40°C. Among them, the ashless formulation of UNP AH502C stands out in terms of low-temperature filterability and cold-start anti-wear performance, effectively addressing the core pain points of difficult cold start and low-temperature wear in hydraulic systems in severe cold regions.

5. Principle of Prioritizing Cost-Effectiveness and Stability in Procurement

For target customers such as hydraulic oil production enterprises, construction machinery maintenance service providers, and mainframe supporting manufacturers, the procurement of hydraulic oil compound additives is by no means a simple price comparison, but rather a systematic selection process with performance compatibility as the premise, batch stability as the core, supply chain stability as the guarantee, and optimal comprehensive cost as the goal , which must strictly adhere to the following five procurement principles:

(1) Prioritize performance adaptation, and eliminate over-selection and under-selection

The core premise of procurement is that the performance of the compound is fully compatible with the target operating conditions, oil grade, and host requirements. Both under-selection and over-selection will result in cost losses.

Insufficient selection: Choosing low-cost compound agents with substandard performance will cause hydraulic oil to fail to meet the requirements of the working conditions, leading to equipment wear, breakdowns and shutdowns, incurring high maintenance costs and losses from customer complaints, and even affecting brand reputation.
Over-specification: Blindly selecting high-end imported formulations and ultra-high-performance compounding agents will significantly increase procurement costs, while the excess performance cannot deliver value under normal operating conditions, resulting in unnecessary cost waste.

UNPChemicals' full range of hydraulic oil compound products can cover the full range of grade requirements from ordinary L-HM anti-wear hydraulic oils to high-pressure long-lasting and synthetic anti-wear hydraulic oils, and can provide precise product selection solutions based on the customer's target oil positioning, equipment operating conditions, and main engine certification requirements, helping customers achieve optimal cost while meeting performance requirements.

(2) Batch stability is the core principle of procurement

The batch stability of hydraulic oil compound additives directly determines the performance consistency of blended oils and is the core factor ensuring stable production for customers. Once batch performance fluctuations occur in the compound additives, it can lead to blended oils failing to pass national standard tests, resulting in batches of substandard products, and may even trigger equipment failure claims from end customers, causing irreparable losses.

Qualified suppliers shall establish a full-process quality control system, including full-item inspection of raw materials upon arrival at the factory, precise control during the production process, and full-item performance testing of finished products before leaving the factory. Each batch of products shall be accompanied by a complete full-item inspection report (COA) to ensure that the batch deviation of core performance indicators is controlled within a minimal range.UNPChemicals relies on strict R&D standards and a full-process quality control system. Each batch of hydraulic oil compound additives undergoes comprehensive performance tests including anti-wear, anti-oxidation, anti-rust, anti-emulsification, anti-foaming, etc. The batch deviation rate is far lower than the industry average, which can fully ensure the stability of customers' blending production and eliminate economic losses caused by unqualified batches.

(3) Supply chain stability is the foundation for long-term cooperation

The demand in the construction machinery industry is strongly correlated with infrastructure cycles and mine operating rates, with demand during peak seasons experiencing short-term surges. If suppliers' supply capabilities are insufficient, it may lead to supply disruptions for customers, resulting in the loss of market share and customer resources.

When purchasing, priority should be given to suppliers with large-scale production capabilities, stable raw material supply chains, sufficient safety stock, and rapid response capabilities. UNPChemicals has been deeply involved in the industry for many years, established a stable global raw material procurement system and large-scale production bases, and established a comprehensive safety stock management system, which can ensure long-term and stable supply. At the same time, it has the ability to quickly respond to emergency orders, meet customers' sudden demands during peak seasons, and completely avoid the risk of supply interruption.

(4) Comprehensive cost accounting, rather than simply comparing purchase unit prices

Most buyers tend to fall into the misconception that "lowest unit price = lowest cost". In fact, the comprehensive cost of using hydraulic oil compound additives includes not only the purchase unit price but also multiple dimensions such as dosage, blending efficiency, oil change interval, equipment maintenance cost, and after-sales processing cost.

For example, a compound with a lower unit price requires an addition dosage of 1.2% to meet the national standard requirements, while the UNP AH502A high-zinc anti-wear hydraulic oil compound, with a slightly higher unit price, only requires an addition dosage of 0.85% to meet the national standard GB 11118.1 L-HM premium product standard, resulting in a lower comprehensive cost of additives per ton of hydraulic oil after calculation; at the same time, high-performance compounds can extend the oil change cycle of the oil, reduce the maintenance cost of terminal equipment, bring higher product added value to customers, and have a comprehensive cost far lower than that of low-priced and inferior products.

(5) Technical service capabilities are an important consideration in procurement

The procurement and application of hydraulic oil compound additives are not simply product transactions. During the production and application process, customers will face various technical requirements such as base oil compatibility, formulation optimization, blending process guidance, oil product testing, terminal problem troubleshooting, and customized product development. The technical service capabilities of suppliers directly affect the product competitiveness of customers.

When purchasing, priority should be given to suppliers with a professional R&D team, a comprehensive technical service system, and extensive industry application experience. UNPChemicals has a professional R&D and technical service team that has been deeply involved in the hydraulic oil additives industry for many years, providing customers with full-process technical services from formula design, blending process guidance, comprehensive oil product testing, terminal problem troubleshooting to customized product development, helping customers solve various pain points in production and application, quickly optimizing product structure, and enhancing market competitiveness.

Summary

The selection of compound additives for special hydraulic oils in construction machinery primarily centers around the characteristics of equipment operating conditions, matching corresponding specific performance requirements, while also taking into account the batch stability, supply chain stability, and comprehensive cost-effectiveness of the products. Choosing a professional and reliable additive supplier not only ensures high-quality and well-suited products but also provides full-process technical service support, safeguarding the quality of hydraulic oil products from the source and reducing the failure risk and comprehensive operating costs of terminal equipment. UNPChemicals, as a professional supplier deeply rooted in the hydraulic oil additive industry, has always provided hydraulic oil compound additive solutions tailored to various engineering machinery working conditions for a wide range of customers with strict R&D standards, stable product quality, and comprehensive technical services, helping customers enhance the core competitiveness of their products.

The Price of Hydraulic Oil Additives Package

The price of Hydraulic Oil Additives Package varies depending on factors such as brand, specification, composition, and sales channels. If you are interested in Hydraulic Oil Additives Package, please feel free to contact us.

Supplier of Hydraulic Oil Additives Package

UNPChemicals is a professional supplier of high-quality and effective Hydraulic Oil Additives Package. We offer several remarkable products, namely High zinc hydraulic oil additives UNP AH502A,Low Zinc Hydraulic Oil Additives UNP AH502B,Zinc-free Hydraulic Oil Additives UNP AH502C,etc.

High zinc hydraulic oil additives UNP AH502A are a type of chemical additive used in hydraulic oils that contain high levels of zinc dialkyldithiophosphate (ZDDP). ZDDP is a well-known anti-wear agent that also provides antioxidant, anti-corrosion, and anti-foam properties. The zinc in these additives plays a crucial role in forming a protective film on metal surfaces within the hydraulic system, thereby reducing wear and extending the life of the system components.

Low Zinc Hydraulic Oil Additives UNP AH502B are a class of advanced lubricant additives designed to enhance the performance of hydraulic oils with reduced zinc content.These additives are formulated to provide a balance of anti-wear,extreme pressure,and antioxidant properties,making them suitable for modern hydraulic systems that demand high performance with lower environmental impact.

Zinc-free Hydraulic Oil Additives UNP AH502C are a new class of environmentally friendly lubricant additives designed for hydraulic systems.These additives are formulated to provide the same level of performance as traditional zinc-containing additives but without the heavy metal content,reducing the environmental impact of hydraulic fluids.

Professional Lubricant Additive Manufacturer

UNPChemicals,aka Luoyang Pacific United Petrochemical Co., Ltd., focuses on the application and development of special lubricating grease additives such as MODTC, MODTP, molybdenum amide, thiadiazole metal deactivators, and phosphate esters. With nearly 30 products in seven series, including extreme pressure anti-wear additives and special grease additives, it is a global manufacturer of special lubricating grease additives and a national high-tech enterprise with great influence and leading role in the industry. If you are looking for Lubricant Additive or technical information, feel free to contact UNPChemicals.