Troubleshooting and Maintenance Guide for 15/415 Screw Pump

The 15/415 screw pump is widely used in chemical, oil, and industrial applications for its ability to handle viscous fluids. Despite its reliability, common faults such as rotor seizure, stator delamination, and pressure loss can occur. Understanding rapid diagnostic and corrective measures ensures minimal downtime and maintains operational efficiency.

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Common Faults of 15/415 Screw Pump and Rapid Solutions

1. Rotor Seizure

Rotor seizure occurs when mechanical binding prevents rotation. Causes may include insufficient lubrication, solid debris, or misalignment.

• Diagnosis: Check motor current, abnormal vibration, or unusual noise.
• Solution: Disassemble the pump, inspect rotor and stator clearance, remove debris, and ensure proper alignment.

2. Stator Delamination

Stator delamination can result from high temperature, chemical corrosion, or prolonged operation beyond design limits.

• Diagnosis: Inspect stator surface, measure dimensions, check for visible cracks or peeling.
• Solution: Replace stator according to standard procedures, ensure chemical compatibility, and monitor operating temperature.

3. Pressure Loss

Pressure loss can indicate internal leakage, worn rotor/stator, or pump cavitation.

• Diagnosis: Measure inlet/outlet pressure, inspect rotor-stator wear, check for cavitation signs.
• Solution: Replace worn components, adjust rotor-stator clearance, and eliminate cavitation sources.

Preventive Maintenance Tips

• Regularly inspect 15/415 screw pump maintenance guide procedures.
• Monitor rotor temperature and vibration for early detection of rotor seizure.
• Perform periodic stator checks and replace when signs of wear appear.
• Maintain correct lubrication and ensure compatible fluids are used.
• Keep records of industrial screw pump fault diagnosis to identify recurring issues.

Comparison of Fault Causes and Solutions

FAQs

1. How often should the 15/415 screw pump be inspected for potential faults?

Inspection frequency depends on operating conditions. For standard industrial use, visual inspection and lubrication checks should be done weekly, while internal component inspection is recommended every 3–6 months.

2. Can rotor seizure be prevented entirely?

While not entirely preventable, regular cleaning, proper lubrication, and ensuring no foreign debris enters the pump greatly reduce the risk of rotor seizure.

3. What is the typical lifespan of a stator in a 15/415 screw pump?

With standard operating conditions and regular maintenance, the stator can last 2–5 years. Lifespan may reduce under high temperature, abrasive fluids, or chemical exposure.

4. How do I identify cavitation in the pump?

Cavitation can be identified by unusual noise (similar to gravel movement), vibration, or reduced output pressure. Immediate corrective action should involve adjusting suction conditions or increasing inlet pressure.

5. Are there recommended spare parts to keep for emergency maintenance?

Yes, maintaining spare rotors, stators, seals, and lubricants is essential. Keeping a stock ensures quick replacement during downtime and prevents production losses.