V-DTN 16/26/41 Vacuum Pump Repair

Dry-running rotary vane compressors with volume flow from 17 to 52,2 m3/hr and overpressure up to 1 bar. With integrated paper intake filter. The soundproof cover ensures low noise and intensive cooling and protects against contact with hot surfaces. Flexible connection options, vibration-free, easy to operate, maintain and install. Motor complies with DIN EN 60034 and has IP 55 protection class and F class insulation.

Operating principle of dry-running rotary vane vacuum pumps

Increasing pressure by reducing volume is the operating principle of rotary vane operation. This design provides excellent performance in pressure, vacuum or a combination of both.

In a cylindrical housing, the rotor is mounted eccentrically so that its top almost touches the cylinder. The so-called rotor blades or vanes are located in the rotor slots.

When the rotor starts turning, centrifugal force throws the vanes out and they slide along the inner surface of the cylinder. In this way, a cell is formed between two vanes, and its volume changes continuously during rotation. 

The air enters a cell from the inlet until the trailing vane reaches the far end of the inlet. At this point the cell has reached its maximum volume. As the cell moves away from the port, its volume becomes smaller and smaller, so the air is compressed and the pressure rises.

This continues until the pressure in the cell exceeds the pressure in the pressure chamber, and the compressed air is then discharged through the outlet port.

Some models are fitted with a discharge valve that prevents discharged air from flowing back if maximum pressure is reached. In vacuum pumps, the process is similar, but the pressure in the cell decreases while the chamber is at atmospheric pressure.

For pressure-vacuum pumps, the lower end of the vacuum inlet is moved forward. The cell can now be filled through a second inlet. To avoid weakening the vacuum, the second inlet is located about one cell segment away from the main suction inlet. The ratio between vacuum and pressure capacity is influenced by the choice of inlet port.

• V-DTN 16/26/41 Vacuum Pump Repair view