Engineered for low-seam clearance, high-torque utility, and explosive-environment safety standards in underground mining networks.
Shaanxi Kelong New Materials Technology Co., Ltd. was founded in 1996, growing from the Xianyang Kelong Rubber Products Institute into a global powerhouse. We are a technological innovation enterprise integrating R&D, advanced manufacturing, and technical consulting. We focus heavily on engineering industrial hydraulic seal sets, high-pressure rubber hoses, coal mine auxiliary transportation machinery, and repair solutions.
Over decades of expansion, Kelong products have served crucial operations in coal mining, civil aviation, high-speed rail networks, heavy engineering machinery, and wind power generation. Our engineering output is trusted by multi-national corporations and mining operations globally, positioning us in the top three of the domestic coal machinery sealing sector.
To serve the challenging infrastructural and logistics needs of regions like the Philadelphia industrial corridor, we match high-end European technologies with heavy-duty US safety standards, optimizing fleet operations and drastically cutting down maintenance cycles.
Understanding supply chain logistics, port importations, and regional coal basin requirements.
While Philadelphia is not an active coal mining district itself, it acts as a primary industrial gateway and logistics corridor for the heavy manufacturing, steelworks, and mineral extraction industries of the Appalachian basin. Regional deep-mine operators in Pennsylvania, West Virginia, and Eastern Ohio look to the Port of Philadelphia (PhilaPort) and regional distributors for heavy machinery logistics, custom-designed hydraulic fabrications, and fleet spare parts.
Longwall shield carriers (chocks) represent some of the heaviest underground mobile machinery in existence. Safely shifting these 50-to-80-ton roof support shields along underground passages requires massive traction control, low-profile stability, and zero-compromise sealing technology to handle extreme hydraulic pressure fluctuations. Kelong New Materials bridges the gap between global heavy engineering and localized US operations by delivering components that meet both rigorous European engineering norms and US Mine Safety and Health Administration (MSHA) demands.
By leveraging specialized engineering methodologies—such as the Austrian DMH system for precision seals and Italian high-pressure hose production equipment—we ensure that longwall carriers running in the toughest terrains maintain optimal performance, reducing seal failure downtime by up to 35% under peak stress loads.
Our commitment to 7%+ annual R&D investment translates to state-of-the-art machinery and component seals.
Our sealing materials and machined geometries utilize production technology and tooling from DMH Company in Austria, ensuring tolerances within micrometer limits for absolute reliability.
Our modern industrial hydraulic hose manufacturing base leverages complex braiding and spiral machinery imported directly from Italy to construct ultra-rugged high-pressure lines.
We combine high-payload structural steel framing with high-efficiency hydraulic suspension. Our longwall carriers are built to transition smoothly down steep inclines without losing traction.
Explore real-world applications of our hydraulic systems and mining transport equipment across various industries.
Deploying ultra-tough, high-pressure hydraulic hoses to heavy shearers and longwall systems operating under intense load cycles.
Rigorously field-tested hydraulic line layouts ensuring zero-burst reliability and high flexibility on mobile gantry cranes at the Port of Philadelphia.
Saltwater-resistant, heavy-duty hydraulic lines combining flexibility and structural outer-sheathing for rapid marine deployment.
Elevating turbine operating lifespan through high-altitude, ozone-resistant control hoses designed to execute precision pitch changes.
Providing custom multi-spiral hydraulic hose solutions for Tunnel Boring Machines working on East Coast transit tunnels, ensuring low maintenance overhead.
Get in touch with Kelong engineers to develop customized hydraulic, transport, or sealing components tailored to your operation.
High-torque underground transporters and custom component kits engineered to withstand the harshest operations.
Direct engineering answers regarding low-seam operations, material compositions, and sealing systems.
The DMH manufacturing process avoids standard molding limitations by using direct machining of semi-finished elastomeric billets. This allows Kelong to manufacture high-diameter piston and rod seals with zero tooling costs. The raw polyurethane compounds achieve higher chemical cross-linking density, offering superior hydrolysis resistance and reducing seal degradation under continuous mineral oil exposure.
Standard wire-braided hoses tend to experience fatigue at high pressure cycles due to friction at wire intersections. The spiral layout used in Kelong's SAE 100 R13 hoses arranges high-tensile steel wire in parallel layers. This geometry distributes mechanical stress evenly, allowing the hose to handle dynamic impulses up to 5,000 PSI without structural deformation.
Low-seam mine passages require a compact chassis with a low center of gravity. Our heavy-duty hydraulic support trucks (ranging from 50T to 80T capacities) use low-profile designs combined with multi-axle steering. This minimizes ground pressure and allows operators to move roof chocks through tight cross-cuts without striking roof support systems.
We maintain strict ISO 9001 and IRIS certifications. Every batch of rubber compounds undergoes rheological verification, and final assemblies are pressure-tested to strict safety coefficients. This guarantees that components imported through logistics corridors like Philadelphia meet local safety regulations and operating tolerances.
Consult with our engineering team for customized high-pressure hose packages, heavy transport carriers, or high-performance sealing systems tailored to your machinery.
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Kelong New Materials
