KAESER Pressure maintenance system Model DHS4.0 150 DN150 PS16

KAESER DHS 4.0 150 DN 150 Pressure Maintenance System – Reliably Ensuring Compressed Air Quality

The KAESER The DHS 4.0 150 pressure maintenance system protects the treatment components of your compressed air station from overflow during restart after periods of light load or downtime. Without a pressure maintenance system, there is no resistance to the network pressure—compressed air flows through Refrigeration Dryers and Compressed Air Filters at too high a speed and impairs the quality of the compressed air.

The DHS 4.0 150 is equipped with an intermediate damper (shut-off damper) and is installed directly into the pipeline with a DN 150 flange connection. The patented control system with pulse width modulation precisely controls the spring-loaded pneumatic rotary actuator and ensures the minimum pressure at a maximum operating pressure of 16 bar. Two selectable operating modes cover both stations with multiple treatment lines (Operating Mode I) and systems with a single treatment line (Operating Mode II).

The electronic control unit, featuring a 25-language display, an integrated pressure sensor, and a SIGMA NETWORK interface, enables integration into the higher-level control system SIGMA AIR MANAGER 4.0. In addition, the DHS 4.0 150 features a Modbus-TCP interface, dry-contact inputs and outputs, and a manual emergency override in the event of a power failure. Its dimensions are 397 × 342 × 645 mm (W × D × H), and it weighs 28.9 kg.