Heavy-Duty Check Valve for Rock Drill Jumbos Designed to prevent reverse fluid flow in hydraulic systems of rock drill jumbos, this check valve ensures reliable operation in high-pressure mining environments. Its robust construction withstands vibration, pressure surges, and abrasive contaminants, critical for maintaining system integrity during drilling operations.
Technical Specifications & Design
Core Construction:
316 stainless steel body provides exceptional corrosion resistance (15μm electroless nickel plating enhances durability), while NBR seals (ISO 16232-7) ensure leak-tight performance with hydraulic oils and coolants .
Rated for 350 bar maximum working pressure, it handles the peak pressures generated by rock drill jumbo hydraulic pumps, preventing backflow that could damage sensitive components .
Precision Engineering:
5ms closing response time minimizes pressure drop during flow reversal, protecting hydraulic cylinders and motors from cavitation. BSPP 1″ ports (ISO 228-1) with ±0.05mm concentricity ensure seamless integration with standard hydraulic lines .
Environmental Resilience:
Operates reliably from -20°C (cold underground mines) to +120°C (high-friction hydraulic circuits), maintaining seal integrity and pressure ratings across temperature extremes .
72-hour salt spray resistance (ASTM B117) validates its suitability for damp or humid mining conditions, extending service intervals by 40% compared to uncoated valves .
Applications
Rock Drill Jumbos: Protects hydraulic pumps, cylinders, and control valves in drill arm and propulsion systems.
Mining Equipment: Compatible with loaders, crushers, and tunneling machines requiring high-pressure check valves.
Industrial Hydraulics: Suitable for heavy-duty presses, injection molding machines, and steel mill hydraulic systems.
