Adsorption dryers of the DHM series are designed for drying compressed air and nitrogen to pressure dew points of -20°C to -50°C (depending on the design) at operating pressures of up to 350 bar.
The desiccant has a high drying capacity for moisture and a long service life of several years. This ensures permanently low and stable pressure dew points.
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 5 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 4 non-return valves and one needle valve for adjusting the regeneration flow is also installed in a leak-free aluminium valve block. A silencer is used for effective reduction of the expansion noise.
As standard, the dryer is provided with a prefilter (fine filter) which prevents solid and liquid contaminants from entering the dryer. This increases the service life of the dryer. An afterfilter (general purpose filter) is also provided as standard. It is used to prevent desiccant dust from entering the downstream system. The filters are already fitted to the dryer by using high pressure stainless steel pipes and fittings.
The dryers comply with the requirements of the Pressure Equipment Directive 97/23/EC, and have the CE marking of this European directive.