High-Heat-Dissipation Water Pump of Sandvik DD2710 in Russia

The DD2710's water pump delivers flushing water to the drifter at the 15–20 bar required for effective cuttings removal from Ø45–76 mm development holes. In Siberian underground operations at Polyus Natalka—where the mine water available for flushing is drawn from a settling pond fed by snowmelt and carries suspended fine particles during spring thaw periods—the flushing water pump operates with inlet water that's cleaner in some months and contaminated with fine glacial flour in others. Glacial flour (rock particles below 10 microns from glacial grinding) passes the settling pond's settling time and enters the flushing pump's impeller chamber, causing accelerated impeller and mechanical seal wear.

The high-heat-dissipation specification addresses a specific Siberian operational challenge: the DD2710 flushing water pump runs warm in deeply ventilated headings where the incoming mine air is at 35–40°C during summer operation. The pump's mechanical seal—the component that prevents flushing water from leaking along the pump shaft—relies on liquid film lubrication between the seal faces. When water temperature at the seal rises above 60°C, that film approaches its vapor point, and intermittent cavitation at the seal face degrades the seal surface within 200 hours.

Water Pump Mechanical Seal Life in Russian Operating Conditions

Natalka's maintenance team added 80-micron basket pre-filters to the DD2710 flushing pump inlets during spring thaw season—a 30-minute installation per rig that reduced pump seal failures during the 6-week thaw period by 70%. Outside the thaw period, the filters are removed to reduce flow resistance. The seasonal adaptation, now documented in Natalka's maintenance manual, is shared across Polyus's Siberian fleet. HOVOO supplies DD2710 flushing water pump mechanical seal kits for Russian operating conditions. References at hovooseal.com.