Zander Hiross Compressed Air Technoloy

Compressed air dryers

The air that is sucked in and compressed by a compressor inevitably contains a proportion of water vapour. When the air is compressed and cooled, the water condenses inside the compressed air system. This invariably leads to corrosion and premature ageing of the system, and sensitive components can be damaged directly. Compressed air dryers are therefore an important preventive measure to keep moisture out of the compressed air system and thereby minimise downtimes. Hiross Zander is one of the world's leading manufacturers of refrigerated dryers for industrial applications. Refrigerated dryers are usually installed downstream of the compressed air tank to take advantage of the pre-cooling via the compressed air tank. The compressed air is cooled further until the moisture condenses. It can now be separated by a condensate separator and discharged from the system. The Starlette Plus® and PoleStar Smart® series are suitable for small to medium capacities. Quasar or LCD units are the better choice if large quantities of compressed air are required.

Adsorption dryer

In adsorption dryers, a desiccant is used to extract moisture from the compressed air. In order to avoid interrupting the operation to regenerate the desiccant, the Zander adsorption dryers have several containers which are operated alternately. Optional pressure dew point sensors allow the drying efficiency of the individual vessels to be monitored and thereby enable better control of the active and regeneration phases. In models with pressure dew point sensors, the compressed air can be dried to a pressure dew point of -25°C and -70°C. On the other hand, heat-regenerating adsorption dryers of the WVM 40-150 series dry at a pressure dew point of -25° to -40°C. In this variant, vacuum drying which is particularly energy-efficient is used to regenerate the chambers. As a bonus, flushing gas losses can be completely avoided.

Compressed air filters

Zander offers a wide range of compressed air filters for low, medium and high pressure systems. The range includes filters with both flanged and threaded connections.  A distinguishing feature is the degree of filtration of the compressed air filter elements. Filters for general use, e.g., for coarse pre-cleaning of the compressed air, are identified by the abbreviation Q. P stands for fine filtration, as required for compressed air motors or vacuum pump afterfilters. Grade S is a filter with a main focus on oil vapour separation. C stands for critical filtration, for example, filtration processes necessary for medical applications, or processes in the food industry. D marks filters for particularly low pressure dew points, such as those used in adsorption drying systems. Zander offers the filter series G for particularly high operating pressure up to 350 bar.