After half a century as a manufacturer of compressors, JUN-AIR has a depth of experience and knowledge in many applications.
After half a century as a manufacturer of compressors, JUN-AIR has a depth of experience and knowledge in many applications.
Dry Air Compressors
Atmospheric air contains water vapour, which condenses to water droplets when the compressed air cools. Water in compressed air causes a major inconvenience to the user, as it may damage the equipment connected to the compressor. At the same time, moisture and heat from the compression of the air create favourable conditions for growth of microorganisms. If the compressed air is in direct contact with human beings, animals, food or medical equipment, hygiene problems may arise.
To ensure both clean and dry compressed air, JUN-AIR offers two types of dryers: adsorption air dryers and membrane dryers. They are - unlike many types of dryers in the market - designed for continuous operation. The adsorption air dryer removes water vapour before accumulating the dry compressed air in the receiver - ensuring a constant and absolute pressure dew point of -40�C. Bacteria become inactive at a pressure dew point below -23�C and may subsequently be removed. The risk of corrosion is eliminated at -30�C.
The membrane dryer is smaller and requires less service. The membrane dryer may be preferred where the dew point only has to be lower than the ambient temperature. This will ensure moisture-free air.
Jun-Air adsorption drying system
Ambient air (1) is compressed to 8 bar / 120 psi. During this compression, the air gets heated.
In order to force as much water vapour as possible to condense before the air reaches the dryer, the compressed air is led through a radiator (2), decreasing the temperature of the compressed air to a level close to the ambient temperature.
The air then enters a prefilter (3) with a filtration degree of 0.01 micron, where solid particles and liquids (water) coalesce inside. After removal of dirt particles and water liquids, the air is conducted to the adsorption dryer (4), which has two columns each containing activated alumina. For two minutes, the compressed air flows upwards through the desiccant bed of the first column, where the remaining moisture is adsorbed. Simultaneously, a small portion of the now dried air flows downwards through the other column and exhausts, removing moisture and thus regenerating the desiccant.
A cam timer is activated every second minute when the compressor is running and reverses the functions of each column, thereby ensuring a continuous supply of dry air.
After drying, the air passes another 0.01 micron filter (5), which retains desiccant particles that may be carried through the system with the air. (As comparison, the smallest particle the human eye can see is in the order of 50 microns).
Finally, the now completely clean and dry air flows to the air receiver (6), which has an internal protective coating, for storage and/or use.
mounted with a dryer
mounted on compressor
M/mounted with a dryer
air dryer cut-away
cut-away
Advanced Technical Services Ltd Ph: +64 3 377 4793
20 Brisbane street, Christchurch, New Zealand
