Engineered for high temperature tolerance, mechanical wear resistance, and extreme dust mitigation in Mali's demanding industrial and mining fields.
Shaanxi Kelong New Materials Technology Co., Ltd. was founded in 1996, which grew from Xianyang Kelong Rubber Products Institute. We are a technological innovation company integrating R&D, production, and sales. We concentrate on high-reliability hydraulic seal sets, high-pressure industrial rubber hoses, coal mine auxiliary transportation equipment, technological services, and customized polymer engineering.
Our sealing products adopt the advanced equipment and production technology of DMH Company in Austria, and our hydraulic hose production base adopts a complete set of precision processing machinery imported from Italy. The high-quality products and services we manufacture are trusted by heavy industry operators all over the world, including the mining hubs of West Africa.
Understanding the severe operating environments of West Africa and why ordinary rubber seals and hydraulic components fall short.
Mali's economy is highly reliant on natural resources, with gold mining being the cornerstone of its industrial sector. Major mining operations in regions such as Kayes, Sikasso, and Koulikoro deploy heavy earthmoving machinery, track-mounted excavators, and processing plants that run continuously under taxing conditions. These machinery units require robust hydraulic transmission lines and high-integrity sealing systems to prevent costly operational downtime.
Furthermore, Mali's local climate is characterized by the semi-arid Sahelian environment. High ambient temperatures peaking over 45°C, combined with abrasive particulate matter (Harmattan dust storms), pose a severe threat to standard rubber materials. Dust ingress acts as an abrasive medium on hydraulic piston rods, degrading rod seals and contaminating hydraulic oils. Simultaneously, extreme ambient heat accelerates the thermal aging and oxidation of low-grade elastomers, leading to premature cracking, loss of sealing pressure, and hydraulic fluid leakage.
To combat these issues, industrial operators in Mali are transitioning to heavy-duty polyurethane (PU), Fluorocarbon (FKM), and high-tensile Nitrile Butadiene Rubber (NBR) formulations. Kelong's localized product engineering ensures our hydraulic hoses and seal components withstand high pressure, heavy mechanical shocks, and thermal-oxidative degradation.
Specially formulated double-lip wiper seals (such as our KL100 TPU series) prevent micro-abrasive silica sand from entering hydraulic cylinders, protecting internal rod seals from scoring.
Our high-grade synthetic elastomers (FKM & NBR) retain their tensile strength and elasticity at sustained temperatures exceeding 100°C, preventing vulcanization and cracking.
High-tensile wire spiraled and braided configurations (EN 856 4SH / SAE 100 R12) resist high-frequency pressure surges typical of rock breakers and heavy excavators.
Our heavy-duty sealing profiles and high-pressure hoses deployed in demanding operating environments across West Africa.
A look at the strict engineering certifications, supply chain structures, and operational excellence behind our products.
Modern industrial operations require reliable suppliers that can match cost efficiency with rigorous technical standards. At Shaanxi Kelong, we leverage integrated production technology to guarantee raw material traceability and absolute dimensional consistency. With an annual production capability backed by over 600 million RMB in assets, we are positioned to support massive mineral exploration projects in West Africa with minimal lead times.
By shipping directly from our automated Chinese manufacturing facilities through reliable logistics corridors (including ocean freight to Port of Dakar, Senegal, or Abidjan, Ivory Coast, followed by inland rail/road transit to Bamako), we minimize supply chain friction. We ensure that our African mining and construction clients maintain an optimal inventory of high-pressure hoses and replacement cylinder seals, avoiding costly emergency air freight charges.
Our manufacturing and testing facilities are certified to ISO 9001:2015 and IRIS international quality standards. This ensures that every hydraulic hose is tested for burst pressure, impulse wear cycles, and elastomer tensile strength before dispatch. Third-party testing by SGS confirms our compliance with environmental and industrial safety standards, giving project managers complete confidence in product reliability.
Technical performance specifications for our key products optimized for high-temperature and high-abrasion industrial environments.
| Product Type / Compound | Material Base | Operating Temp. Range | Working Pressure Range | Key Technical Standards | Primary Industrial Use in Mali |
|---|---|---|---|---|---|
| Wire-Braid Hydraulic Hose | NBR Inner Tube / High-Tensile Steel Wire Braid | -40°C to +100°C | Up to 400 Bar (5800 PSI) | EN853 1SN-1 / SAE100 R1 | Medium pressure return lines, auxiliary engine controls |
| Spiral Hydraulic Hose | Synthetic Rubber / 4-Layer High-Tensile Wire Spiral | -40°C to +120°C | Up to 500 Bar (7250 PSI) | EN 856 4SH / SAE100 R12 | Heavy excavator main booms, rock hammers, pile drivers |
| Double-Lip Wiper Seal (KL100) | Thermoplastic Polyurethane (TPU) | -35°C to +110°C | N/A (Excludes dust/moisture) | ISO 6195 Type C | Saharan silica dust exclusion on hydraulic cylinders |
| Heavy Duty Rod Seal (KL06) | NBR / POM / PU Composite | -40°C to +120°C | Up to 700 Bar (10150 PSI) | DIN ISO 7425-2 | Hydraulic cylinder main piston rods in mining trucks |
| Premium O-Rings | Fluorocarbon Elastomer (FKM / FFKM) | -20°C to +250°C | Static up to 400 Bar | SGS Approved / ASTM D2000 | High-temperature manifold blocks & mining machinery engine valves |
Adapting to the future of smart mining and highly sustainable hydraulic systems.
Kelong is currently engineering double-color external sheath rubber layers. When the protective outer cover wears down due to abrasive friction against machine structures, a bright contrasting layer becomes visible, signaling preventative maintenance prior to burst failure.
To support environmental initiatives across global mining sites, we are developing bio-derived NBR alternatives. These formulations maintain the same chemical resistance to hydraulic oils while lowering the carbon footprint of factory production by up to 25%.
Future development includes embedding low-profile RFID tracking chips directly into heavy-duty polyurethane guide rings. This allows operators to scan the cylinder casing using handheld scanners to view serial numbers, installation dates, and run-time parameters.
Solving common field failure mechanisms and material compatibility questions for engineering teams in Mali.
Standard Nitrile (NBR) has a maximum continuous service temperature of approximately 90°C. In regions like Mali, the combination of high ambient temperatures (45°C+) and system frictional heat drives internal oil temperatures past 100°C. Under these conditions, standard NBR experiences rapid thermal cross-linking, causing it to harden, crack, and lose its sealing lip flexibility. For these applications, we recommend high-performance Hydrogenated Nitrile (HNBR) or Fluorocarbon (FKM) compounds, which remain chemically stable up to 150°C and 200°C, respectively.
Fine sand particles from the Sahara wind adhere to the thin oil film on exposed hydraulic cylinder rods. When the cylinder retracts, poor-quality wiper seals allow these particles to pass into the sealing system. These abrasive particles score the metallic rod surface and wear down high-pressure seals, causing premature bypass leakage. Implementing a double-lip wiper seal like our KL100 TPU (made of thermoplastic polyurethane) provides a physical wiping lip to exclude dry dust and a secondary sealing lip to retain oil, effectively protecting the high-pressure system.
Wire braided hoses (like EN 853 1SN/2SN) offer high flexibility and are suitable for medium-pressure dynamic applications. However, heavy earthmoving machinery experiences severe pressure spikes (hydraulic impulses) during rock breaking or digging. Spiral wound steel wire hoses (like EN 856 4SH) feature wire reinforcements wrapped in parallel layers, providing higher mechanical resistance and impulse life. This construction prevents wire fatigue, making it suitable for high-impulse, heavy-duty mining machinery.
Yes. Utilizing advanced CNC-machining equipment from DMH Austria, we can manufacture custom profiles up to 4000mm in diameter without requiring expensive mold development. This capability is ideal for custom mining plant modifications or rapid prototyping of replacement seals for aging heavy machinery fleets.
Hydraulic hoses and elastomeric seals are sensitive to ozone, UV radiation, and mechanical deformation during transit. We package our hoses in heavy-duty woven plastic wrap and mount them on sturdy pallets to prevent crushing. Rubber seals are vacuum-sealed in UV-blocking plastic bags and boxed with desiccant packs, ensuring they arrive in Bamako in factory-original condition, ready for storage or immediate installation.
Explore our full range of certified high-pressure hydraulic lines and precise sealing components designed for industrial and mobile applications.
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