Gerotors & Pumps Blog

Positive Displacement Pump Maintenance: Why Do You Need It?

Positive displacement pumps are pivotal elements of several industries, performing essential tasks that involve moving fluids at constant volumes. However, their performance and longevity significantly depend on maintenance. Properly maintaining your positive displacement pump is crucial to ensuring it operates efficiently and lasts for a long time. This blog post will cover the primary considerations and steps for positive displacement pump maintenance.


Understanding Positive Displacement Pumps

Before diving into the maintenance aspect, it’s necessary to comprehend what a positive displacement pump is. Positive displacement pumps move fluids by trapping a specific amount and forcing (displacing) that trapped volume into the discharge pipe.


Routine Maintenance

Regular maintenance is key to the longevity of positive displacement pumps. Here are a few routine maintenance activities to ensure your pump’s optimal performance:

  1. Lubrication: The parts of the pump need regular lubrication to function smoothly. Check the conditions of bearings and seals for any signs that lubrication is inadequate. 
  2. Seal Inspection: Inspect pump seals for leaks regularly. If there are any leaks, this could signal wear and tear, requiring seal replacement. In the absence of any leaks, check the visible sealing surface for wear marks.
  3. Vibration analysis: Regularly checking for excessive vibration can help predict potential failures. Unusual vibrations may indicate imbalances, misalignments, or mechanical wear in the pump components.
  4. Temperature monitoring: Keep a regular check on the operating temperature of the pump, and in areas where evidence of excessive heat could lead to wear or catastrophic failure, such as gear teeth. Overheating can lead to severe damage, reducing the life of your pump.

Preventative Maintenance for Positive Displacement Pumps

Preventative maintenance involves tasks performed to avoid potential failures. Here are a few key preventative measures:

  1. Regular inspections: Regularly inspect all pump components, such as the motor, seals, bearings, and pumping elements.
  2. Proper installation: Proper installation plays a significant role in the pump’s overall life. Ensure the pump is correctly aligned and all parts are tightened as per manufacturer’s recommendations.
  3. Scheduled servicing: Stick to the servicing schedule as advised by the pump manufacturer. Regular servicing involves cleaning, inspecting, and if required, replacing worn-out components.

Corrective Maintenance

Despite the best preventative practices, pumps may eventually fail. Corrective maintenance comes into play when there are pump issues that need immediate attention. Here are a few measures for corrective maintenance:

  1. Replacement of parts: If any component of the pump shows signs of severe wear and tear, it should be replaced promptly.
  2. Correcting misalignments: Misalignment is a common issue that can cause excessive vibration, leading to premature wear and tear. A pump’s bearings and pumping elements should move smoothly, without any hitching or unusual noise. Correcting misalignments promptly can prevent further damage.
  3. Troubleshooting: Any operational issues should be dealt with promptly. This involves identifying the root cause of the problem and addressing it.

Maintaining Your Pump

Proper maintenance of your positive displacement pump can significantly enhance its lifespan and efficiency, thus reducing downtime and saving costs in the long run. Always remember that preventative maintenance is more cost-effective than corrective maintenance. Keep a maintenance schedule and stick to it for optimal performance of your positive displacement pump.

Stay on top of your pump maintenance and you’ll have a machine that keeps your operations running smoothly and efficiently for a long time. Remember, an ounce of prevention is worth a pound of cure, especially when it comes to maintaining industrial equipment like positive displacement pumps.

Ready to learn more? Check out our other resources.