Adsorption dryers of the DPS 1-8 BI and BM series are designed for drying and purification of compressed air for breathing air applications. ..BI stands for „Breathing air Industrial“, thus for Industrial use acc. EN12021, and ..BM stands for „Breathing air Medical“, thus medical breathing air acc. Pharmacopee Europeene, as it is demanded for hospitals. With both systems apart from the drying process to a pressure dew point of  -40°C also the components CO, CO2, hydrocarbons, nitrogen oxides and SO2 are reduced so far, to residual values underneath the limit values acc. EN12021 (with series DPS..BI), respectively Pharmacopee Europeene (with series DPS..BM).

The desiccant has a high drying capacity for moisture and CO2, and a long service life. This ensures permanently low and stable pressure dew points and low CO2 values.

The high quality catalyst agent and the activated carbon guarantee the compliance of the prescribed remaining values for CO, CO2, SO2 carbon oxides and nitrogen oxides (NOx) acc. EN12021, respectively Pharmacopee Europeene.

The valves and flow paths required for vessel chamber switch-over are completely installed in valve blocks. This integrated design eliminates the need for time-consuming piping installation and minimises the leak potential. Air flow cross-section sizes above average minimise the pressure loss. 

The solenoid valve combination consists of 4 pilot-controlled diaphragm valves. Thanks to the individual con-trol option for each valve, overlapping switch-over and a defined flow path is ensured at any time. The non-return valve combination consisting of 2 non-return valves is also installed in a leak-free aluminium valve block. A silencer is used for effective reduction of the expansion noise.

As standard, the breathing air unit DPS..BI (Industrial) is provided with one pre filter (superfine filter) which prevents solid and liquid contaminants from entering the dryer. This increases the service life of the dryer. 

As standard, the breathing air unit DPS..BM (Medical) is provided with two pre filters (fine- + superfine) which achieves still lower value of pollution and ensures a higher safeguarding for medical breathing air.