Chemical Process Pumps

• Pre-start check: Verify rotor flexibility, lubricant quality, valve operation, bolt tightness, intake cleanliness, motor direction, and control system accuracy.

• Priming & startup: Prime the pump (via filling or vacuum pump); start with discharge valve closed, open gauge valves after stable speed, then gradually open the valve (avoid closed-valve operation exceeding 2-3min).

• Operation management: Monitor noise, vibration, bearing temperature (≤75℃), and instrument stability; regular oil changes, packing adjustment, and bolt inspection; keep cooling systems unobstructed and check suction water level.

• Shutdown: Close gauge valves first, then the discharge valve; drain pump body to prevent freezing; ensure water hammer protection systems work effectively.

To keep your chemical pumps running at peak efficiency, implement these professional care strategies:

Daily Visual Inspections: Check for any signs of weeping or leakage around the mechanical seals and pipe joints. Monitor for unusual noises (like "marbles" rattling in the pump, which indicates cavitation) and excessive vibration.

Precision Alignment: Misalignment between the motor and pump shaft is a leading cause of seal and bearing failure. Use laser alignment tools during installation and after any major service to ensure the system is perfectly concentric.

Seal Health Management: For pumps with mechanical seals, ensure the flush system (if present) is operational. Never run the pump dry, as even a few seconds of dry running can heat the seal faces to the point of cracking or "heat checking."

Corrosion Monitoring: Periodically inspect the pump casing and baseplate for signs of chemical attack or oxidation. Even small chips in a protective coating can lead to rapid localized corrosion.

Lubrication Discipline: Over-greasing is as harmful as under-greasing, as it can cause bearing seals to pop or lead to overheating. Always follow the manufacturer’s specified intervals and lubricant types.