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Optimizing Internal Gear Pump Efficiency: Common Mistakes to Avoid

rotary lobe pumps
by Erin Hipolito
January 9, 2024

Understanding Internal Gear Pumps: Critical Insights for Industrial Pump Maintenance

Over the past few months, misconceptions surrounding internal gear pumps have surfaced, potentially jeopardizing the performance and lifespan of these crucial industrial components. As an expert in industrial machinery, it's essential to address and rectify three prevalent errors that can impact the efficiency of internal gear pumps.

Mistake 1: The Pitfall of Bump Starting

One common misstep observed among maintenance crews is the practice of bump starting the pump to check rotation. Despite its routine nature, this approach can be detrimental. Internal gear pumps cannot operate dry, and initiating rotation without product in the pump can lead to rotor-casing friction, causing damage. This was evident in a recent customer visit, where a pump, when bump-started, resulted in scarring on the casing. Dry starts can also compromise mechanical seals. To avoid such issues, refrain from bump starting internal gear pumps without ensuring proper lubrication.

Mistake 2: Debunking the Myth of Self-Priming

Contrary to common belief, internal gear pumps are not self-priming. Some users expect these pumps to effortlessly pull product from trucks during unloading operations. However, internal gear pumps require a flooded head to initiate pumping. Similar to siphoning through a hose, the product needs to be at the pump before suction can occur. It's imperative not to start the pump dry, as this can impede its ability to create the necessary suction.

Mistake 3: Decoding Persistent Packing Seal Leaks

A recurring issue faced by maintenance personnel is packing seal leaks. When confronted with a leaking pump, the first consideration should be the type of seal in use. Packing seals are designed to leak intentionally, providing lubrication to prevent drying and shaft scarring. Tightening the retaining bracket in an attempt to stop the leak is counterproductive and can potentially damage the pump. Different packing styles may minimize leakage, but for a leak-free solution, a mechanical seal might be necessary, potentially requiring a change in pump styles.

Prolonging Pump Life: Essential Tips for Maintenance

Avoiding these three common mistakes is paramount for extending the life of internal gear pumps and ensuring consistent performance. By understanding the intricacies of pump operation, engineers and technicians can contribute significantly to the longevity and efficiency of industrial machinery.

Engage with Pye-Barker Engineered Solutions

Are you facing challenges with your internal gear pumps? Ensure the longevity and efficiency of your industrial machinery with Pye-Barker Engineered Solutions.
Reach out to our team of experienced technicians and engineers. We're here to address your concerns and provide tailored solutions for your specific needs.

Request a Quote



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