Adsorption dryers can only be energy efficient if they contain premium desiccant material. The desiccant used in Pneumatech adsorption dryers is carefully selected from a wide range of European and North-American suppliers, based on following key selection criteria:
Desiccant is subject to continuous cyclic load. Due to this load, low-quality desiccant will easily break up resulting in small dust particles, hereby quickly losing its water attraction capabilities, blocking valves or clogging the downstream dust filter and silencer.
Standard desiccant will degrade when it comes in contact with liquid water. Although a water separator should be installed upstream of an adsorption dryer, some water carry-over to the lower part of the adsorption dryer can never be excluded. All Pneumatech adsorption dryers are therefore equipped with water-resistant desiccant material in the bottom part of the vessel.
We carefully balance initial capital investment with ongoing running cost. Silica gel has the highest adsorption capacity and is therefore used in heat regenerated adsorption dryers (PE & PB). In the dynamic operation conditions of heatless adsorption dryers (PH) only a small percentage of the total static adsorption capacity is used because of the relatively short cycle times. The use of silica gel in the case of -40°C/-40°F PDP applications would increase the initial investment significantly, but would not bring any purge loss reduction or other benefits. Heatless adsorption dryers are therefore filled with activated alumina3 which provide equal dew point requirements (-40°C/-40°F PDP) and energy efficiency at lower investment costs.
Compressed air will always contain some level of moisture depending on the environment and ambient temperature surrounding the compressor. Using the air while it contains moisture can cause a number of issues for your tools, other equipment and ultimately your business.
Air dryers are used downstream of an air compressor to rid the compressed air of any moisture or humidity before it reaches your application or final product. Using air dryers is imperative in many applications such as the food/beverage industry, electronics manufacturing and spray painting in the automotive industry.