Basic Precautions And Reminders For A Long-Lifetime Vane Pumps
In every aspect of hydraulic system maintenance, exercising precautionary measures is always more beneficial than dealing with rehabilitation after breakdowns occur. Not only do these precautions prevent unexpected failures, but they also significantly extend the lifespan of our vane pumps. Below, we present essential precautions to avoid premature breakdowns and ensure the longevity of your vane pumps:
- Start up your components with a proper air bleed-off process.
- Continuously monitor fluid velocity (inlet & outlet) to determine the appropriate sizes of pipes, hoses, and connectors. The inlet line's fluid velocity should not exceed 1.9 m/s, while the discharge line should maintain a velocity of 6.0 m/s.
- Minimize the use of a strainer on the inlet line. If necessary, select a strainer with a minimum rating of 250 microns and always check its pressure drop, especially when dealing with high fluid viscosity.
- Install a high-quality return line filter to ensure effective filtration.
- Consider the viscosity of the oil in relation to its temperature. Even slight temperature adjustments can significantly impact viscosity, affecting the lubrication of crucial parts.
- Calculate the pressure at the inlet port, as it determines the rotational speed of the shaft and the positioning of the tank. For detailed information, refer to the minimum inlet pressure tables provided in our catalogs.
- Thoroughly evaluate the ratio of flow to tank capacity and the cooling requirements of the power unit.
- Pay attention to precise coupling with the driving source, proper shaft alignments, and adequate lubrication.
- Carefully select the appropriate fluid based on various factors: Viscosity index, viscosity grade (ISO 32, 46, 68, etc.), environmental conditions (biodegradability, fire resistance, normal conditions), operating temperature range, filterability, deaeration capability, and thermal stability.
- To avoid cavitation when using a pump on a rapidly pressure cycling machine, consider the relationship between pressure rise/fall gradient and inlet pressure. We recommend adhering to maximum limits, such as 5000 bar/s (72500 PSI/s) for pressure rise and 6000 bar/s (87000 PSI/s) for pressure fall when using mineral oil.
In conclusion, by implementing good filtration practices, maintaining high fluid quality, ensuring proper thermal stability, and possessing a sound understanding of hydraulics, you can safeguard your components from premature breakdowns and ensure their optimal performance.
