Fluid-Tight Plug for Hydraulic Rock Drills This plug is engineered to seal fluid ports and access holes in hydraulic rock drill systems, preventing hydraulic fluid leakage in high-pressure, corrosive mining environments. Constructed from C36000 free-cutting brass—known for its machinability and compatibility with hydraulic fluids—it integrates a nitrile (NBR) O-ring to ensure long-term leak-tight performance, a critical requirement for maintaining system pressure and preventing environmental contamination.
Key Performance Attributes
Material & Durability:
C36000 brass meets ASTM B16 standards, offering excellent resistance to hydraulic fluids (mineral oil, water-glycol) and mechanical wear. The 5μm nickel plating enhances corrosion resistance, withstanding 400+ hours of salt spray testing (ASTM B117)—suitable for damp underground mining conditions where uncoated brass would tarnish or corrode.
The hexagonal head design allows secure wrench tightening, avoiding stripping during installation, while the NPT 1/4 tapered thread creates a mechanical seal that complements the O-ring, eliminating leak paths even under pressure surges.
Sealing & Precision:
The integrated NBR O-ring (70 Shore A) provides 100% leak-tight performance, validated through ISO 15171 hydraulic component testing at 35MPa—well above the typical operating pressure of hydraulic rock drills (20-30MPa). The thread is manufactured to ANSI/ASME B1.20.1 tolerances, ensuring consistent fit with standard NPT fluid ports.
Operational Reliability:
The -30°C to +100°C operating range ensures flexibility of the NBR O-ring and structural integrity of the brass, even in cold underground tunnels or warm surface operations. The plug requires no periodic maintenance, with a service life of 5,000+ hours in standard drilling conditions—aligning with routine drill maintenance intervals.
Applications
Primary use: Sealing fluid ports, drain holes, and access openings in hydraulic rock drill hydraulic circuits.
Compatible equipment: Tunneling machines, quarry drills, and mineral exploration rigs requiring OEM-spec hydraulic plugs.
