Rotary lobe and rotary vane pumps are both widely used on vacuum trucks, but they work in different ways. Understanding the difference helps you pick the right technology for your fleet.
How a rotary lobe pump works
In a lobe pump, two rotors turn inside the body without touching each other. Because there is no contact between the rotors, wear is low and the pump is well suited to long, continuous duty.
How a rotary vane pump works
A vane pump uses a rotor with sliding vanes. As the rotor turns, the vanes move in and out, creating chambers that draw in and push out air. Vane pumps are compact and reach high vacuum levels quickly.
Quick comparison
- Continuous work: lobe pumps are a strong choice for long working hours.
- Compact size: vane pumps fit well on smaller trucks.
- Maintenance: vane pumps need vane checks; lobe pumps need regular gear oil checks.
There is no single best pump. The best pump is the one that matches your daily work.
Which one should you choose?
If your trucks run all day on the same site, a lobe pump often makes sense. If you need a compact, versatile pump for varied jobs, a rotary vane pump may be the better fit. Talk to us and we will help you decide.