What are the maintenance requirements for pulp pumps?

Pulp pump maintenance demands systematic operations. Key requirements are outlined below:

Daily Maintenance

• Lubrication: Check power-end oil level daily (ensure cleanliness). Replace new pump oil after 1 week; subsequent replacements every quarter.

• Seals: Monitor cylinder liner/piston leakage (replace if excessive). Mechanical seal leakage ≤2 drops/min; packing seal leakage 5–10 drops/min.

• Cooling: Inspect spray pump tank water level; clean/replace if contaminated.

• Pressure & Safety: Verify discharge air chamber charging pressure; test safety valve reliability regularly.

Periodic Maintenance

• Primary (1,000h): Inspect packing, end cover screws, couplings, pressure gauges; clean filters.

• Secondary (3,000h): Clean bearing housings, replace oil/grease, check packing wear/coupling alignment, and replace pump bearings.

• Tertiary (10,000h): Full overhaul for multi-stage pumps (e.g., inspect balance disc/ring wear).

Emergency Handling

Shut down immediately on failure to prevent damage; keep standby pumps ready for quick switching to maintain production continuity.

Special Notes

• Slurry Pumps: Daily loosen piston rod clamps, rotate pistons, and lubricate cylinder/valve cover threads.

• Centrifugal Pumps: Rotate 3–5 turns within 8h of shutdown; check cooling water temperature and flow rate.