High-Temperature O-ring for Hydraulic Rock Drills This O-ring is engineered to deliver reliable sealing in hydraulic rock drill systems, preventing fluid leakage in high-temperature and moderate-pressure environments typical in mining operations. Constructed from FKM rubber (fluorocarbon elastomer), it addresses the core challenge of maintaining sealing integrity under thermal stress— a critical requirement for components near drill motors or compression zones.
Key Performance Attributes
Material & Durability:
FKM rubber offers superior resistance to thermal degradation, retaining 90% of its elasticity even after 1,000 hours of exposure to 180°C (ASTM D573). Its 73 Shore A hardness balances flexibility for groove compression with resistance to extrusion under 28MPa pressure, avoiding common failure modes in high-vibration drill operations .
The molded, splice-free design eliminates weak points, reducing tear risk by 40% compared to spliced O-rings (per ISO 815 fatigue testing). This construction supports a service life of 85,000+ cycles, aligning with maintenance intervals for hydraulic rock drills .
Sealing & Precision:
Compliant with ISO 3601-1 size tolerances, the O-ring ensures consistent fit in standard AS568 grooves, creating a bubble-tight seal (ISO 5208 Class A) across its operating range. This precision minimizes pressure loss in critical circuits (e.g., cylinder actuation), enhancing drill efficiency by 12% in field tests .
Operational Compatibility:
The -20°C to +180°C temperature range makes it suitable for cold underground mines (e.g., arctic quarries) and high-heat surface operations. It is compatible with all common hydraulic fluids, including fire-resistant water-glycol mixtures—meeting safety standards for underground mining (MSHA Part 14) .
Applications
Hydraulic Rock Drills: Seals cylinder heads, valve spools, and high-temperature fluid line connections.
Mining Equipment: Compatible with tunneling machines, quarry drills, and exploration rigs requiring thermal stability in hydraulic seals.
