Pressure boosters are twin-piston pressure intensifiers and are only capable of compressing air. The basic variant of the booster simply consists of a twin-piston system and a reversing valve which assures continuous operation. Input pressure is doubled with the basic setup – it’s not possible to select a lower boosting level.
Pressure boosting can be reduced to a value of less then twice the input pressure with the help of air pressure boosters which are additionally equipped with a pressure regulator.
In this case, pressure in the external chambers is reduced by the pressure regulator. The pressure regulator is decisive with regard to the amount of boosting which is actually achieved. However, due to the utilised operating principle, pressure cannot be boosted to a value of greater than twice the input pressure.
The pressure booster DPA is a twin-piston pressure intensifier used to compress air. When the compressed air booster DPA is pressurised with compressed air, secondary pressure is automatically built up. The output pressure p2 can increase to up to twice the value of the input pressure p1. The required output pressure is set using a manually operated pressure regulator. In the case of Festo pressure boosters without a pressure regulator, the output pressure is always double the input pressure. A special feature of the Festo compressed air booster DPA is the sensing option: when equipped with an external sensor and an adding counter, the DPA can detect the strokes of the drive piston, thus enabling the service life to be monitored. Pressure boosters are designed in principle to increase the pressure at low air consumption.