The Democratic Republic of Congo (DR Congo) represents one of the world's most demanding operating environments for industrial machinery. The nation's copper and cobalt mining belt, centered in provinces such as Lualaba and Haut-Katanga, supplies a critical portion of the globe's transition metals. However, the mineral processing plants, open-pit mines, and deep-shaft operations run on heavy machinery that is continuously subjected to extreme mechanical friction, high-pressure demands, abrasive stone dust, and corrosive slurry.
Standard industrial seals frequently fail under these conditions. The combination of intense ambient humidity, acidic groundwater typical of Central African mineral belts, and fine silica dust leads to premature polymer degradation, micro-abrasion of piston rods, and sudden fluid power loss. To maintain equipment uptime for large mining fleets (such as CAT, Komatsu, and Sany excavators) and processing mills, operators require engineering-grade sealing solutions that possess high wear resistance, optimized mechanical design, and thermal stability.
In hot, high-humidity regions like Kolwezi and Lubumbashi, hydraulic fluids absorb moisture rapidly. Conventional sealing materials break down due to hydrolysis (water-induced polymer chain cleavage). Kelong New Materials implements customized Polyurethane (PU) and fluorocarbon (FKM) formulations that resist hydrolysis, preserving hydraulic pressure and reducing equipment downtime by up to 40% compared to standard aftermarket imports.
Modern fluid power systems operate under immense pressure, sometimes exceeding 700 Bar in heavy hydraulic cylinders. Choosing the appropriate sealing material is not just a procurement detail—it is a critical safety and engineering decision. Below is the technical breakdown of the elastomer materials developed and supplied by Kelong New Materials for industrial applications:
| Material Class | Common Compounds | Temperature Range | Key Properties & Mechanical Suitability | DR Congo Industrial Application |
|---|---|---|---|---|
| Nitrile Rubber (NBR) | NBR 70 Shore A / NBR 90 Shore A | -30°C to +100°C | Excellent resistance to petroleum-based oils, water, and mechanical abrasion. Highly cost-effective. | Standard hydraulic cylinders, gearboxes, and low-pressure fuel systems. |
| Fluorocarbon Elastomer | FKM / Viton (75 - 90 Shore A) | -20°C to +200°C | Exceptional resistance to chemical solvents, acids, heat, and ozone. Low compression set. | Acidic mineral processing plants, chemical transport, and high-temp engines. |
| Polyurethane (PU) | UHS / UN Grades, Hydrolysis-Resistant PU | -40°C to +110°C | Extreme tensile strength, extrusion resistance, and outstanding wear and tear properties. | Heavy-duty rod seals and wiper seals on mining excavators and dump trucks. |
| PTFE Compounds | PTFE + Bronze / Carbon / Glass Fiber | -200°C to +260°C | Extremely low coefficient of friction. Zero stick-slip. High pressure resistance with backup rings. | TBM (Tunnel Boring) piston rings and high-speed hydraulic actuators. |
Specially engineered backup rings paired with high-shore-durometer materials prevent sealing lip extrusion under pressure spikes.
Integrating PTFE and advanced slip agents minimizes energy losses, heat generation, and cylinder stick-slip phenomena.
Extending seal lifetimes directly reduces continuous maintenance interventions and prevents expensive oil spills.
Engineered specifically for heavy earth-moving equipment and high-flow mining machinery operating under relentless pressure in the Katanga Copper Belt.
Shaanxi Kelong New Materials Technology Co., Ltd. was established in 1996, evolving from the Xianyang Kelong Rubber Products Institute. Today, we are an industry-leading, technologically innovative enterprise integrating research, development, custom polymer formulation, and global export services. We focus on hydraulic seal sets, high-pressure hoses, and engineering equipment. Our product lines serve critical industries worldwide, including coal mining, civil aviation, high-speed rail, heavy machinery, wind power, and maritime projects.
Our company ranks in the top three of the domestic coal machine sealing industry. We project our high-pressure rubber hoses and frame-type handling vehicles to enter the top three within the next two years. Currently, our core products hold an 8% market share in the highly competitive domestic industrial market.
We invest more than 7% of our annual revenues into research and development. This dedicated funding enables us to maintain our technical edge, designing components that conform to international certifications, including ISO and IRIS standards. We deliver our products directly to demanding global locations, including the Democratic Republic of Congo's key logistics terminals.
Our engineered solutions are deployed worldwide in demanding environments, from high-altitude civil works to underground mining systems.
Ultra-tough, high-pressure hydraulic hose for rock-solid machinery performance in mining environments.
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Rigorously tested, our hydraulic hoses remain stable under extreme volumetric expansion and high loads.
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Innovative design: combines flexibility and high corrosion resistance, easy to install in salty environments.
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Upgrade your wind machinery's operating efficiency with our temperature-tolerant hydraulic systems.
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Seals tight and lasts long in heavy vibration and underground pressure, reducing maintenance costs.
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To match international tolerances, our sealing products utilize machinery and manufacturing software imported from DMH Company in Austria. DMH CNC machining systems enable us to design and mill seals from 4mm up to 2500mm in diameter.
This high-precision processing ensures exact dimensioning. It eliminates the flash lines and material imperfections commonly found in molded competitors, preventing early seal failures.
Our hydraulic hose production lines feature fully integrated machinery sourced from leading Italian equipment manufacturers. This technology controls the wire tension and spiral angle with high precision.
By maintaining a uniform layout in the steel wire reinforcement layers, our hoses easily handle pressure spikes and structural bending. This gives our hydraulic products higher bursts ratings and longer lifespans.
Procurement processes in the DR Congo require meticulous planning to prevent costly project delays. Import regulations (such as OCC conformity certifications and FERI shipping documentation) demand structured supply chain protocols. Kelong New Materials provides end-to-end logistics solutions, coordinating with international shipping networks to deliver directly to primary dry ports, including Kolwezi, Lubumbashi, and Kinshasa.
We leverage established shipping lanes via the Dar es Salaam and Durban corridors to ensure reliable overland transport to landlocked mining areas.
All shipping documents, certificates of origin, and compliance certifications are fully prepared beforehand to minimize customs clearance times.
Heavy-duty, vacuum-sealed UV-shielded packaging keeps moisture, ozone, and dust away from sensitive elastomer seals during transit.
Browse our extensive range of high-wear piston seals, pneumatic rings, agriculture-focused elastomer connectors, and spiral-reinforced wire hoses.
Partner with a top-tier global manufacturer serving the DR Congo industrial and mining regions. Get technical consulting, customized design parameters, and streamlined logistics.
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Kelong New Materials
