Explore our top-tier heavy-duty industrial seals, high-pressure hose pipes, and hydraulic solutions engineered for high-stress underground mining and heavy engineering equipment.
An authoritative technical analysis of subterranean heavy equipment transport, load kinematics, fluid power transmission, and specialized sealing integrity in coal mine logistics.
Hydraulic support handling trucks—frequently designated as frame-type handling vehicles or underground shield haulers—represent the backbone of longwall mining equipment relocation. Operating in confined, hostile subterranean environments characterized by steep gradients, loose floor strata, high ambient humidity, and explosive gas atmospheres (methane and coal dust), these heavy-duty carriers must possess extraordinary structural strength and operational flexibility.
The primary chassis design incorporates high-yield alloy steel fabrications capable of supporting payload capacities ranging from 20 metric tons to well over 100 metric tons. To navigate narrow mine roadways with tight radius curves, advanced multi-axle frame-steering systems are utilized. Hydrostatic all-wheel drive, powered by heavy-duty diesel or flame-proof electric hydraulic power packs, delivers smooth, continuous torque across varying subterranean ground conditions without gear shift disruption.
The operational reliability of hydraulic support handling trucks hinges entirely upon the integrity of their high-pressure hydraulic circuitry. Hydraulic lifting frames, winch drives, steering cylinders, and hydrostatic braking mechanisms demand fluid pressures exceeding 35 MPa (350 bar) up to 70 MPa (700 bar) under impulse peak loads.
To withstand severe mechanical abrasion, micro-pulses, and corrosive mine water, our high-pressure rubber hose assemblies utilize multi-spiral high-tensile steel wire reinforcement (SAE 100R1, EN853 1SN/2SN, and 4SP/4SH standards). Coupled with precision-engineered fittings and protective outer sheaths, these hoses ensure zero pressure drop and zero leak performance throughout heavy duty cycles.
Extending seal lifecycle, eliminating hydraulic fluid loss, and protecting critical machinery against extreme abrasive particulate ingress.
Featuring wide operational temperature thresholds (-60°C to +260°C), customized PTFE (Polytetrafluoroethylene) static ring seals (such as the KL124 series) provide exceptional chemical resistance and non-stick low-friction properties. Ideal for high-pressure hydraulic block manifolds where dynamic seal creep must be completely eliminated.
High-grade polyurethane formulations (KL12, KL14, KL93) offer extreme tensile strength and superior tear resistance compared to standard nitrile rubbers. Designed with optimized symmetrical and asymmetrical lip geometry, these seals maintain tight film control on piston rods during high-speed stroke dynamics.
Underground mining environments present severe slurry and fine particulate exposure. Double-lip wipers (KL-93) and NBR fabric chevron packing sets (KL112) actively scrape away micro-abrasives from reciprocating rods, preventing seal cavity degradation and preserving hydraulic fluid cleanliness.
Shaanxi Kelong New Materials Technology Co., Ltd. manufactures elite sealing systems utilizing advanced CNC seal-making equipment and production software directly imported from DMH Company in Austria. Unlike conventional molded seals, our CNC-machined seal process eliminates expensive tooling lead times, allowing custom dimensional profiles to be manufactured with micron-level tolerances directly from engineering CAD blueprints. This capability is pivotal for rapid field replacement of custom hydraulic support handling truck cylinders and specialized heavy machinery.
Unlocking Total Cost of Ownership (TCO) efficiency through raw material vertical integration, large-scale production capacities, and robust OEM export logistics.
From chemical compounding of raw polyurethane and elastomeric polymers to full chassis machining, hydraulic assembly, and rigorous load testing, our complete in-house manufacturing ecosystem minimizes intermediary markups and guarantees total quality oversight at every stage.
Holding top-three market status in the domestic coal machine sealing sector with an 8% overall market share, Shaanxi Kelong leverages massive raw material purchasing power. This enables highly competitive, discounted wholesale pricing for international buyers, engineering contractors, and mine equipment exporters.
Supported by over 180 qualified engineers and technicians, we facilitate express OEM/ODM customization cycles. Coupled with streamlined export compliance, custom sea/air packaging, and proximity to major transport corridors, global delivery timelines are reduced by up to 35%.
Meeting rigorous global standardizations, certification protocols, and tailored regional mining regulations across North America, Europe, Australia, Africa, and Asia-Pacific.
Global procurement teams demand stringent quality verification. Shaanxi Kelong operates under certified ISO 9001 quality management and IRIS (International Railway Industry Standard) frameworks. Furthermore, our coal mine auxiliary transportation products and high-pressure sealing components comply with mandatory mining safety approvals (MA/LA certification), ensuring full explosion-proof, flame-retardant, and anti-static (FRAS) compliance for hazardous underground operations.
We understand that unscheduled downtime in longwall mining operations can cost thousands of dollars per hour. We provide comprehensive localized technical support, including on-site engineer dispatch for hydraulic support handling truck commissioning, seal replacement training kits, and custom consigned spare parts inventories stationed near major international mining hubs.
How next-generation intelligent technology is reshaping heavy-duty underground transport and fluid power systems.
Integration of IoT pressure, temperature, and fluid cleanliness sensors inside hydraulic support handling truck manifolds allows real-time telemetry streaming to mine management control centers, enabling predictive seal wear analysis before failure occurs.
As subterranean environmental regulations tighten, the industry is transitioning from pure diesel engines toward zero-emission lithium-battery electric and hydrogen fuel-cell hybrid hydraulic power units, reducing underground ventilation power demands.
Autonomous navigation using LiDAR, ultra-wideband (UWB) positioning, and AI path planning is enabling driverless hydraulic support handling trucks to transport multi-ton shields along narrow longwall drifts safely and autonomously.
Technological Innovation Pioneer Integrating R&D, High-Precision Manufacturing, and Global After-Sales Engineering Services Since 1996.
Shaanxi Kelong New Materials Technology Co., Ltd. was founded in 1996, evolving from the renowned Xianyang Kelong Rubber Products Institute. We are a technological innovation enterprise integrating research and development, manufacturing, and global commercial sales.
Our operational scope concentrates on hydraulic seal sets, high-pressure rubber hose assemblies, coal mine auxiliary transportation equipment (including heavy-duty frame-type handling vehicles and hydraulic support handling trucks), equipment overhaul and refurbishment services, and advanced technical consulting. Our products are widely applied across Coal Mining, Civil Aviation, High-Speed Railway, Heavy Engineering Machinery, Wind Power Generation, and Offshore Tunneling.
At present, the company's total assets stand at 600 million RMB, achieving an annual output value exceeding 400 million RMB. Supported by a workforce of over 500 employees, nearly 180 are specialized engineers and technicians (over 40% holding college degrees or higher, with R&D personnel accounting for 17.5%). Over the past three years, annual R&D expenditure has consistently exceeded 7% of gross revenues.
Over 500 employees, 180 engineers, dedicated R&D center, and 7%+ annual R&D reinvestment guarantee robust manufacturing capability.
ISO 9001 and IRIS certifications ensure rigorous multi-stage quality inspections across every stage of fluid hose and vehicle assembly.
Modern multi-line industrial facilities equipped to produce high-pressure hydraulic hoses, frame handling trucks, and custom polyurethane seals.
Utilizing DMH Austria seal machinery and complete imported Italian hydraulic hose production lines for world-class product precision.
Demonstrated reliability and performance in extreme operational environments across heavy industries.
Ultra-tough, high-pressure hydraulic hose solutions engineered for heavy-duty underground shearers, hydraulic roof supports, and support handling trucks, delivering rock-solid machinery performance under high vibration.
Rigorously tested under dynamic flex loading, our specialized high-pressure hose assemblies maintain system stability and eliminate hydraulic drift in heavy mobile cranes and outrigger systems.
Innovative marine-grade hose and seal design combining extreme flexibility, salt-spray corrosion resistance, and high burst pressure thresholds for offshore platform fluid handling.
Upgrading renewable energy equipment efficiency through specialized hydraulic pitch control hose systems engineered for continuous duty in extreme altitude and low-temperature conditions.
Seals tight and lasts long in ultra-high pressure Tunnel Boring Machine (TBM) hydraulic propulsion circuits, drastically cutting downtime and routine maintenance overheads.
Expert responses to critical engineering, OEM ordering, custom seal fabrication, and export compliance queries.
Discover our comprehensive range of dual-purpose oil seals, pneumatic piston rings, and fluid connector components available for global export.
Kelong New Materials
