FAQ Quality Air Solutions
What is the maximum ambient and inlet temperature for the dryers?
Max ambient temperature is 45°C, and Max working temperature is 55 °C . See the sheet on the second page for advice, how to size your dryer according to site conditions?
Sometimes I receive mails from my customer center about dryers and I see that designation on dryers are called A3, A11 and so on. What does this designation mean?
It’s an internal designation code which is used in the product company. From customer point of view there is no need to learn this codes, but as a dealer you can from time to time run into this terms, so it’s good to have some knowledge what it means. This “ internal designation “ is also visible on the data plate attached on the back of the dryer.
What is "PRESSURE DEW POINT"?
Pressure Dew Point - For a given pressure, the temperature at which water VAPOR will begin to condense INTO liquid water.
Where are the refrigerant dryers produced?
Most of the dryers are produced in the north part of Italy(Brendola). Northern Italy has a long tradition within the compressed air business and the region offers very competent and high skilled work force.
How should I size the dryer? Should it be equal to the compressors max capacity?
There is no exact role to follow. But some of the major points to consider are:
Pressure Dew Point needed (PDP).
Volume of compressed air (SCFM or l/min)
Maximum compressed air dryer inlet temperature (°F or °C)
Maximum ambient temperature (°F or °C)
Maximum compressed air pressure (PSIG or BAR)
Maximum allowable dryer pressure drop (PSIG or BAR)
The FAD published in leaflets are referring to the REFERENCE CONDITIONS:
Working pressure 7 bar.
Working temp. 35°C
Ambient Temp. 25°C.
If the dryer will work at different reference conditions, then we must recalculate the new FAD.
Where should I place the dryer? Before or after the receiver and where should I place the filters?
The optimal solution to have a calm and stable flow over the dryer is to place the receiver before the dryer. Also the filter should be place before the dryer but after the receiver. To get clean air into the dryer extend the life time of the dryer and will increase your air quality. Ask the customer what the area of use is, for example instrument air its classified under ISO certification. Talk to your sales responsible if you are unsure how the ISO classing is build up, or read the filter leaflet for advice.
When and why is a dryer necessary?
In almost all application and areas of use there is a need of a dryer. In a very few applications you can skip the dryer, for example if the air is in direct contact with water. Water have a direct damaging impact on all kinds of machinery equipment, to protect your production we strongly recommend you to always offer a dryer to end customer and explain the risks without having dry and clean air.
Difference between refrigeration and adsorption dryer?
The refrigerant dryers uses an refrigerant gas in order to cool the compressed air and then remove the water condensate from the air, with this technic we can reach MAX. 3°C. PDP. An adsorption dryer, use an " adsorption material called desiccant " in order to remove ( adsoprb ) the humidity on the compressed air. With this method we can reach a PDP < 3°C. ( -40°C. or -70°C.). Depending on which dryer and option the customer chooses to use.
An adsorption dryer is required to be used when the ambient temperature goes under ZERO °C, to avoid ice building in pipes and applications.
Advantages of an integrated dryer?
The footprint gets drastically smaller, also the installation cost gets more cost efficient due to less need to pipes and couplings. One disadvantage can be the service access which decrease due to the integration with the compressor.
What arguments can I as a dealer use to promote my dryers to customers?
The product company produce more than 12 000 dryers per year. Well priced and high quality together with low maintenance costs are some of the main arguments. The compact design and the wide product range is other strong arguments. The simplicity and well planned placement of the service parts results in easy and quick maintenance.