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The pressure intensifier DPA is a type of double piston pressure intensifier for compressing air. If compressed air is applied to the DPA compressed air intensifier, secondary pressure is automatically built up. The outlet pressure p2 can rise to twice the value of the inlet pressure p1. A manually operated pressure regulator is used to set the desired outlet pressure. With Festo pressure intensifiers without pressure regulators, the outlet pressure is always twice the inlet pressure. A special feature of the Festo DPA compressed air intensifier is its capability for proximity sensing: The DPA can measure the strokes of the drive piston with the aid of an external sensor and adding counter, and thus enables service life monitoring.Pressure intensifiers are designed in principle for a pressure increase with low air consumption. Pressure intensifiers are designed in principle for a pressure increase with low air consumption.