Second Sequence Valve Core C1200042721 is a critical hydraulic sequence control component exclusively designed for Hydraulic Rock Drills. It excels in harsh mining environments—for instance, underground hard rock mines, high-altitude quarries, tunnel construction sites and drilling areas with frequent pressure fluctuations.
These settings pose unique challenges for sequence valve cores: high hydraulic pressure spikes, frequent actuation cycles, abrasive oil contaminants, vibration (up to 40G), and temperature swings. These issues often cause valve core sticking, sequence control inaccuracy, wear, or corrosion, leading to drill component action mismatch and costly downtime. Yet, Second Sequence Valve Core C1200042721 maintains uncompromised performance under all these harsh conditions. In fact, it directly addresses five core pain points that plague mining operations.
First, its stainless steel 316L valve core + PTFE sealing ring withstands 40MPa working pressure and 80MPa burst pressure. This eliminates valve core deformation or leakage caused by pressure spikes in drill hydraulic systems. Second, the ±0.01mm dimensional precision ensures sequence control accuracy within 5ms, matching drill component actuation timing requirements. Consequently, it improves drill operational efficiency by 25% compared to standard valve cores. Third, the anti-sticking surface treatment (polished Ra ≤0.05μm) prevents jamming from hydraulic oil contaminants. Likewise, this reduces maintenance frequency and extends service life by 140%.
Fourth, the optimized flow channel design ensures smooth hydraulic oil passage, avoiding pressure loss during sequence control. Above all, this maintains stable drill component action and prevents system overload. Fifth, the wide temperature adaptability (-30°C~120°C) ensures reliable performance in cold high-altitude mines and hot underground drilling environments. On top of that, the stainless steel 316L material resists corrosion from acidic hydraulic oil additives, enhancing durability in long-term use.
Unlike ordinary sequence valve cores, this model is engineered for Hydraulic Rock Drills’ dynamic working conditions. To elaborate, the 5ms sequence control accuracy matches drill multi-component actuation needs, while the anti-sticking design adapts to contaminated mining hydraulic oil. Thus, it outperforms generic valve cores in service life by 150%, significantly reducing replacement-related downtime.
Our manufacturing team uses precision CNC grinding + ultrasonic cleaning technology for the valve core. Furthermore, each unit undergoes 40MPa pressure testing (30 minutes) and sequence control precision verification. Additionally, the valve core undergoes 100,000-cycle actuation trials to ensure no performance degradation.
Notably, it adapts to extreme temperatures from -30°C (high-altitude cold regions) to 120°C (high-load drill hydraulic systems). Moreover, it passes 500-hour salt spray tests with no corrosion or rust. In addition, the PTFE sealing ring endures 6,000-hour oil immersion trials without aging or leakage.
The valve core’s standard spline connection integrates seamlessly with mainstream Hydraulic Rock Drill valve bodies. It requires no modifications to existing hydraulic control systems for installation. As a result, maintenance teams can complete replacement in 15 minutes using standard tools.
Our quality team conducts strict ISO 9001 verification for every unit. We perform pressure resistance tests, precision inspections, anti-sticking trials and sequence control accuracy verification. Importantly, it complies with ISO 4401 international hydraulic valve standards.
Compatible with top Hydraulic Rock Drill brands, it serves as a direct OEM replacement. Thanks to its reliability, it reduces valve core-related failure rates by 95%. Additionally, backed by a 12-month warranty, it lowers annual maintenance costs by 60%.
It not only ensures precise sequence control for drill hydraulic systems but also extends the service life of drill actuation components by 85%. Overall, Second Sequence Valve Core C1200042721 delivers cost-effective, reliable performance for long-term mining operations. Beyond that, it minimizes downtime caused by valve core failure, maximizing operational efficiency and project profitability.
