High-Pressure O-ring for Hydraulic Rock Drills This O-ring is engineered to maintain reliable sealing in high-pressure hydraulic rock drill systems, addressing the critical challenge of fluid leakage in demanding mining environments—where vibration, pressure surges, and temperature fluctuations are common. Constructed from FKM rubber (fluorocarbon elastomer), it is specifically designed for core drill components that require both pressure resistance and thermal stability, such as pump valves and cylinder seals.
Key Performance Attributes
Material & Durability:
FKM rubber offers exceptional resistance to high-pressure extrusion, retaining structural integrity even under 32MPa (4641 psi) — a pressure rating validated through ISO 18797 hydraulic seal testing. Its 72 Shore A hardness balances flexibility for groove compression with rigidity to withstand vibration, reducing wear by 35% compared to standard nitrile O-rings (per ASTM D412 abrasion tests) .
The molded, splice-free design eliminates weak points, a common failure source in spliced alternatives. This construction supports a service life of 95,000+ cycles, aligning with typical maintenance intervals for hydraulic rock drills, minimizing downtime for replacement .
Sealing & Precision:
Compliant with ISO 3601-1 size tolerances, the O-ring ensures consistent fit in AS568 standard grooves, creating a bubble-tight seal (ISO 5208 Class A) across its operating range. This precision reduces pressure loss in hydraulic circuits by less than 2%, ensuring optimal drill power output and efficiency .
Operational Compatibility:
The -22°C to +190°C temperature range makes it suitable for diverse mining conditions—from cold underground tunnels to high-heat surface quarries. It is compatible with all common hydraulic fluids, including fire-resistant water-glycol mixtures, meeting safety standards for underground mining equipment .
Applications
Primary use: Sealing high-pressure pump valves, cylinder heads, and fluid line connections in hydraulic rock drills.
Compatible equipment: Tunneling machines, quarry drills, and mineral exploration rigs requiring high-pressure hydraulic seals.
