Engineered for maximum reliability, extreme pressure resistance, and zero leakage in harsh underground mining environments.
The underground mining and tunneling sector is undergoing a massive structural transformation. As easily accessible reserves deplete, mining extraction continues to shift deeper beneath the Earth’s surface. Operating at depths exceeding 1,000 meters subjects machinery to extreme hydrostatic pressures, soaring ambient temperatures, and corrosive geologic environments. Under these severe parameters, heavy-duty underground support carriers and auxiliary transportation systems are no longer simple transport assets—they are the operational lifeblood of the modern mine site.
Heavy-duty underground support carriers, including shield haulers, frame-type handling vehicles, and articulated utility trucks, must manage payloads ranging from 20 to over 80 metric tons. The mechanical reliability of these carriers directly dictates the productivity of longwall installations and tunneling progress. Any component failure—whether a hydraulic seal rupture on a suspension cylinder or a high-pressure hose burst in a steering loop—can instantly halt operations, costing companies tens of thousands of dollars per hour in unplanned downtime.
Founded in 1996 and emerging from the Xianyang Kelong Rubber Products Institute, Shaanxi Kelong New Materials Technology Co., Ltd. has established itself as an absolute powerhouse in the domestic and global coal machine auxiliary sealing and hydraulic systems market. Today, Kelong stands proudly among the top three companies in the domestic coal machinery sealing industry. With frame-type handling vehicles and high-pressure rubber hoses projected to secure top-three market positions within the next two years, the company currently commands an impressive 8% domestic market share.
Kelong is a technological innovation leader integrating R&D, high-end manufacturing, and specialized technical services. The company's massive operational scope spans hydraulic seal sets, high-pressure rubber hoses, coal mine auxiliary transportation equipment, rebuild/repair operations, and precision engineering services. Kelong's high-reliability components are widely applied in coal mining, civil aviation, high-speed rail, heavy engineering machinery, and wind power generation, establishing trust across continents.
Combining extreme cost-efficiency with uncompromising European technology standards and high manufacturing resilience.
Procurement professionals operating in global mining sectors (Australia, North America, South America, South Africa, and Europe) face a difficult challenge: balancing cost pressures with performance security. Shaanxi Kelong meets this demand through its China Factory 4.0 paradigm. By integrating advanced production equipment—specifically, Austrian DMH seal machining systems and Italian high-pressure hydraulic hose production lines—Kelong combines the structural reliability of European engineering with the cost benefits of Chinese manufacturing.
This strategic infrastructure ensures high resilience across the supply chain. With domestic raw material integration and specialized automated workshops, Kelong bypasses traditional logjams that plague global logistics, guaranteeing short lead times, stable pricing structures, and consistent component quality.
Every component is engineered, tracked, and tested to withstand the harshest environments on Earth.
Over 500 dedicated employees, featuring 180+ expert engineers and technical staff, powering an independent R&D center with over 7% annual revenue investment.
Certified under rigorous ISO and IRIS standards. Professional quality inspectors manage every step, from polymer synthesis to high-pressure volumetric expansion tests.
Large-scale manufacturing facilities capable of producing standard and bespoke sealing profiles, high-pressure wire spiral hoses, and customized transportation parts.
Integrating top-tier European equipment including Austrian DMH sealing lines and Italian hydraulic hose tooling for high-precision components.
Our technical personnel make up more than 40% of our workforce, with college graduates and dedicated R&D engineers accounting for 17.5%. In the past three years, our R&D investment exceeded 7% of total revenue, ensuring Kelong remains at the forefront of the industry.
Proven durability across harsh applications, from deep-coal logistics systems to offshore drilling installations.
Ultra-tough, high-pressure hydraulic hose for rock-solid machinery performance in mining environments.
Rigorously tested, our heavy-duty hydraulic lines stay stable under extreme dynamic load conditions.
Innovative designs combining flexible mechanics with salt-spray corrosion resistance for easy offshore installation.
Upgrade equipment efficiency with high-pressure fluid hoses optimized for continuous high-altitude oscillation.
Seals tight and lasts long in abrasive, high-pressure environments, lowering aggregate maintenance and breakdown costs during long-run municipal tunneling.
Procuring heavy-duty underground support carriers and their hydraulic components requires an analytical focus on the Total Cost of Ownership (TCO). A lower initial purchase price often leads to higher operational expenses if the equipment components fail prematurely under pressure. Technical buyers prioritize parameters such as hydraulic oil compatibility, extrusion resistance at large clearance gaps, and continuous ozone protection in underground hose lines.
To address these issues, Kelong uses specialized polymers like fluorocarbon (FKM), hydrogenated nitrile rubber (HNBR), and advanced polyurethane (PU). By utilizing Austria-imported DMH CNC lathe tooling, we produce custom-profiled rod and piston seals down to millimeter-level tolerances. This minimizes slip-stick effects, prevents rod drift on hydraulic support props, and extends service life up to three times compared to standard seals.
Technical guidance on selecting sealing solutions and hydraulic components for underground mining vehicles.
Reliable components for hydraulic power transmission in agricultural, construction, and mining machinery.
Kelong New Materials
