Heavy-Duty Seal for Hydraulic Rock Drills This seal is engineered to prevent fluid leakage in high-pressure hydraulic systems of rock drills, withstanding extreme pressure surges, temperature fluctuations, and exposure to abrasive mining contaminants. Its robust FKM construction ensures reliable sealing performance in harsh drilling environments, reducing maintenance downtime and protecting critical components such as hydraulic cylinders and valves.
Key Technical Attributes
Material & Chemical Resistance:
FKM (fluorocarbon rubber) compound (ASTM D1418) offers exceptional resistance to mineral oils, hydraulic fluids (ISO 6743-4), diesel, and greases. Unlike standard NBR seals, it retains 95% of its elasticity after 1000 hours of immersion in aggressive mining fluids, making it suitable for long-term use in demanding conditions .
Pressure & Temperature Performance:
Rated for 25MPa maximum working pressure, it effectively seals hydraulic circuits during peak drilling loads. The -20°C to +200°C operating range ensures stability in both cold underground mines and high-friction hydraulic systems, where conventional rubber seals would degrade .
Precision & Durability:
6mm cross-section with ±0.05mm tolerance (ISO 3601-1) ensures a tight fit in ISO 3601-3 seal grooves, minimizing wear and extending service life to 5000 hours under rated conditions. The dual-lip design enhances leak prevention, while 70 Shore A hardness balances flexibility and resistance to extrusion under high pressure .
Applications
Primary use in hydraulic rock drills for tunneling, quarrying, and mineral exploration.
Compatible with hydraulic systems in mining equipment, including tunnel boring machines and surface drill rigs.
