Explore our highly engineered selection of premium-grade hydraulic hoses and sealing systems designed for special equipment transport vehicles and extreme-duty industrial machinery.
A leading force in industrial material innovation since 1996.
Shaanxi Kelong New Materials Technology Co., Ltd. was founded in 1996, which grew from Xianyang Kelong Rubber Products Institute. It is a technological innovation company integrating R&D, production, and sales. We concentrate on hydraulic seal sets, high-pressure hoses, coal mine auxiliary transportation equipment, repairing coal mine auxiliary transportation equipment, and technological services.
Our advanced engineering products have been widely applied to the Coal Mining industry, Civil Aviation, High-speed railway systems, Engineering machinery, Wind power, and tunnel exploration. The high-quality products and specialized services are trusted by clients all over the world.
Kelong is recognized in the top three in the domestic coal machine sealing industry. Furthermore, our high-pressure rubber hoses and frame-type handling vehicles are projected to reach the top three within two years. Currently, our main products command an impressive 8% share of the domestic market.
A comprehensive technical analysis of high-performance seals, material requirements, and hydraulic infrastructure necessary for auxiliary mine transport systems.
Underground coal mine auxiliary transportation systems demand robust material logistics. Vehicles operating in these sub-surface environments, such as frame-type handling vehicles, have to maneuver high-payload equipment through steep inclines, dynamic shock loads, and extremely humid conditions. The overall system reliability relies heavily on the design of the integrated hydraulic cylinder seals and wire-wound spiral rubber hoses.
When fluid temperature exceeds 100°C or pressure exceeds 350 bar, standard polyurethane seals suffer accelerated thermal breakdown and extrusion. To combat this, Kelong utilizes advanced Austrian DMH CNC technology to design custom high-grade NBR, PTFE, and glass fiber reinforced POM guide rings. This engineering step prevents physical metal-to-metal contact inside the cylinders of high-payload transport vehicles, preserving structural integrity over miles of heavy operation.
| Sealing Material | Underground Transport Vehicle Application | Working Temperature Range | Max Hydraulic Pressure | Key Engineering Benefit |
|---|---|---|---|---|
| PTFE (High-Speed / Low-Friction) | Pneumatic Rod & Control Valve Seals | -60°C to +200°C | 60 MPa | Eliminates stick-slip during micro-adjustments |
| NBR (Nitrile Elastomer) | Double Acting Piston & Compact Seals | -30°C to +120°C | 40 MPa | Excellent abrasion resistance, high compatibility with mineral oils |
| High-Temp Polyurethane (PU) | Single-Acting U-Cup Seals (Light/Heavy Duty) | -35°C to +110°C | 50 MPa | Highly resistant to extrusion and mechanical wear |
| POM + Glass Fiber | Hydraulic Guide Rings & Bearing Strips | -40°C to +130°C | 370 N/mm² (Load) | Excellent load-bearing, prevents internal cylinder scoring |
Unifying international manufacturing standards and raw material precision to build zero-defect hydraulic systems.
Boasting over 500 employees, nearly 180 of whom are engineers and technicians. Backed by our dedicated engineering research center and 7%+ annual R&D investment, we ensure robust and diverse production capacity.
Holding international ISO and IRIS certifications, our professional QA/QC teams conduct strict checks throughout the production process, guaranteeing top-notch product quality for every batch.
Our sealing production center integrates advanced equipment and technologies imported from DMH Company in Austria. Our hydraulic hose production base adopts a complete set of machinery imported from Italy.
How Shaanxi Kelong optimizes cost structures while meeting the complex quality criteria of international industrial buyers.
By operating from Shaanxi, China's core heavy industrial and energy hub, we leverage an optimized raw material supply chain. Local sourcing of rubber compounds, structural steel wire, and premium polymers reduces transport costs. This geographical structure allows us to offer discounted quotes on heavy transport vehicle hoses and seals without compromising quality.
Global heavy equipment manufacturers require flexible partners. Kelong's dual approach—offering standardized catalog items alongside custom CNC machining via our Austrian DMH systems—enables us to cater to both high-volume OEM requirements and specific aftermarket replacement configurations. This agility reduces standard design cycles from months to days.
With a total asset base of 600 Million RMB and an annual output value exceeding 300 Million RMB, we possess the financial stability and capital reserve to manage high-volume international supply agreements. Our manufacturing floors feature automated vulcanizing lines, continuous wire-winding systems imported from Italy, and multi-axis CNC machines to support complex production schedules.
Demonstrated performance in challenging industrial sectors worldwide.
Ultra-tough, high-pressure hydraulic hose for rock-solid machinery performance in deep-pit coal mining operations.
Rigorously tested under dynamic lifting pressures, our hoses ensure continuous boom control and operating stability.
Innovative marine-grade materials combining flexibility and strength, providing resistance to salt-spray and ozone corrosion.
Optimizing mechanical efficiency in wind energy pitch control systems with lightweight, high-integrity hydraulic lines.
Seals tight and performs under intense pressure in Tunnel Boring Machine cutters, reducing critical maintenance downtime.
Ensuring absolute compliance with international mining safety laws and transport regulations.
For special equipment transport vehicles operating in international jurisdictions (such as the EU, North America, or Australia), regulatory compliance is vital. Underground mining vehicles must adhere to strict fire-resistant and anti-static standards (e.g., MSHA in the United States, ATEX directives in Europe, and MA certification in China).
Our range of wire-braided and spiral hoses, including the DIN EN853 1SN and EN 856 4SH series, are built using flame-retardant outer covers. This design helps contain hot fluids in the event of an internal line rupture, reducing fire hazards on heavily laden machinery.
Additionally, modern heavy industries are trending toward environmental responsibility. As a result, biodegradable hydraulic fluids are increasingly mandated in forestry, marine, and open-pit mining operations. Shaanxi Kelong meets this requirement by developing specialized synthetic rubber tubes that prevent chemical degradation when exposed to bio-oils, offering an eco-friendly system with long-term durability.
Direct answers from our engineering team regarding quotes, customization, and technical parameters.
Explore the remainder of our engineered product range, optimized for high-pressure durability and long-term chemical stability.
Kelong New Materials