However, they are capable of lowering the dew point of compressed air to -40F or even -100F. The twin-tower design of air treatment desiccant air dryers allows air drying and desiccant regeneration to occur without interruption of compressed air flow." Our current line of products includes heatless, heated purge, blower purge and modular desiccants. 1 quarter is being regenerated, while the rest is drying the compressed air. ambient temperature and 100 PSIG pressure.. There are three types of desiccant air dryers, which vary in their regeneration methods, energy costs and compressed air use. A dryer of this type will consume 15 to 20% of your (expensive) dried air! Maintenance costs tend to be a bit higher than for non-cycling refrigerated dryers due to their increased complexity. Under normal conditions, Q-Sorb drying beads can provide up to three years of continuous operation. You can find these systems in any industrial application in which reliable equipment and exceptional quality control is necessary. If this oil gets to the desiccant it will stick to the surface of it. The amount of water air can hold depends on both temperature and pressure. Higher dew points (more moisture left in the air), allow the refrigeration circuit to run continually. }
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The twin-tower design of air treatment desiccant air dryers allows air drying and desiccant regeneration to occur without interruption of compressed air flow. An important component of this system is its efficiency. As air is compressed, the higher pressures will cause excess moisture to fall out of the air as liquid condensation at the discharge of the air compressor. Result: your desiccant can't do its job anymore, since it's covered in oil. A desiccant air dryer utilizes quality desiccant material to absorb water vapor from compressed air and is designed for operations that require an extremely low dew point. Single Tower Dryer - Contaminated compressed air enters the oil pre filter housing and flows from the inside to the outside of the element. For the vast majority of manufacturers, a simple refrigerated compressed air dryer (cycling or non-cycling) is adequate. Check it every once in a while to make sure that your dryer is Works correctly out of the box. "@type": "Answer",
Desiccant air dryers work in conjunction with an industrial air compressor. 15 available models accept input from NPT pipe sizes between and 1, at flow rates from eight to 365 SCFM. These specific air dryers operate in remote and hazardous conditions consistently stripping the air of dirt and moisture. View cart for details. Most desiccant air dryers have two towers filled with desiccant beads to allow for continual operation. They control their temperature by the use of a hot gas bypass valve and cycling of the evaporator fan to maintain a tight temperature range. The desiccant dryer can also be referred to as adsorption dryers or regenerative desiccant dryers. ISO class specifies the quality of the air as determined by the International Standards Organization. Why Am I Wasting Money On Compressed Air? Thats why it is important to find a desiccant air dryer you can trust. Contact us to discuss your compressed air dryer options. "@type": "Question",
Maximum amount of digits: 6. If the pressure drop over your dryer is for example 0.3 bar, and you need 6 bars to operate your tools, it means you need to set your compressor at 6.3 bars. For example, excess moisture in air-operated paint lines will have an adverse effect on color, adherence, drying times and finish. The dryer will create an extra pressure drop. working properly. This extra bit of pressure. Heatless Desiccant Dryer - This system uses a small amount of dried, compressed air to purge and restore the off-line tower. Through years of research and experience, Gardner Denver knows what it takes to build the best dryers on the market. Atmospheric air contains water vaporwhat your local weather person will refer to as humidity. These dryers are also available for high inlet temperature applications typically found on reciprocating air compressor systems. ambient temperature and 100 PSIG pressure.. COVID-19 Update: Fluid-Aire Dynamics is here for you, 24/7/365, and even during this pandemic. inlet compressed air temperature,100 deg. Something went wrong. ROI can be realized within five months depending on dryer size and local power costs. The entire process follows a 6-10 minute NEMA cycle, which consists of three to five minutes of drying time, 2 minutes and 25 seconds to 4 minutes and 20 seconds of regeneration and 40 seconds of re-pressurization. These dryers are the most cost-effective and are typically very reliable while maintaining a fairly consistent dew point average of 38F (as long as its properly sized and maintained). Copyright 1995-2022 eBay Inc. All Rights Reserved. Blower Purge Dryer - Desiccant dryers consume energy through the process of using purge air to prepare the off-line desiccant tower for its next cycle of operation by a process called regeneration. With this method, part of the compressed air that has just been dried is used to regenerate the desiccant. Moisture is transported through the drying process allowing the system to blow the material dry. PDP refers to the temperature it would be necessary to cool air to achieve the same amount of dryness. Both refrigerated and desiccant air dryers remove moisture from compressed air. All standard dryers no matter what type have a design criteria of 100 deg. This is just normal air drawn from the compressor room. simply uses up to 18% of the rated capacity of the dryer to purge back through the saturated tower for the regeneration process. Externally Heated Purge Dryer - The externally heated compressed air dryer uses the dew point to product against freezing during low ambient conditions and keeps the compressed air system bone dry during the summer heat. Great sales staff that considers your needs and financial requirements. Multi-stage air dryers include additional air treatment steps, such as air filtering, to treat the air before it is sent to the point of use. Your experience may vary. Quality dryers start with quality components. 2022 Fluid-Aire Dynamics, Inc. All Rights Reserved. There are three types of cycling refrigerated compressed air dryers. Pressure drop. This is often used in the smaller dryers and is also not suitable for big dryers. It takes more energy to operate but preserves the compressed air supply. Why an oil filter? They are refillable with fresh desiccant and are designed to be reused. Learn about industrial compressed air systems and receive fresh articles in your inbox. Also, you can probably throw the desiccant away and buy new one, which can be quite expensive. As the air cools, water vapor condenses into liquid water, which is then drained off and disposed of. I have seen so many mistakes with this over the years and it's so easy to do it right and save money in the long run! What are the dew point requirements and ISO ratings for your application? Quincy Compressors has been in business since 1920. Why a condensate trap and water filter? Almost all compressed air applications will require some type of air-drying system. "@type": "Answer",
A desiccant compressed air dryer uses a special material, called desiccant to dry the compressed air. 1 product ratings - 1" Compressed Air In Line Filter Desiccant Dryer Moisture Water Separator New, Desiccant Air Dryer In other Air Compressors & Blowers. Desiccant air dryers can become expensive because they continuously run. But once you understand the differences between these types of air dryers and what they can do, the choice is likely to be clear. After-filter: It is advisable to install a dust filter after the desiccant compressed air dryer. It may seem difficult to choose between desiccant vs. refrigerated air dryers for your compressed air system. It has to be replaced after a few years. Join 10.000 subscribers - subscribe to my newsletter for regular updates, tips and tricks. These systems are known for being cost-effective and long-lasting. Because the air is hotter, less is required to absorb moisture from the desiccant beads. This means that less compressed air is available for your tools and machinery. "@type": "FAQPage",
Non-cycling air dryers allow the refrigeration circuit to run continually. Werther International The blower component improves the overall efficiency of this process, requiring less air to perform the same amount of work. cycling refrigerated dryers cycle the refrigeration compressor on and off in response to demand. inlet compressed air temperature,100 deg. Their small footprint has been designed to save floor space without compromising performance or efficiency, making them ideal for use in a crowded lab or tight compressor room. This is called regeneration. "acceptedAnswer": {
To have the largest possible surface, the desiccant is used in the form of thousands of small beads. When the thermal mass reaches a predetermined temperature, the refrigeration compressor is switched off to save energy. Overall velocities are kept below 50 feet/minute so that air remains in contact with the desiccant for a minimum of 4.5 seconds. Choose a different country or region to see the content specific to your location. The unique design allows for the dryer to start and stop with a compressor to eliminate purge loss. Desiccant vs. Refrigerated Air Dryers: Making the Right Choice. In food processing or pharmaceutical applications, moisture in compressed air can lead to spoilage. There are also special dryers available for use with oil-free screw compressors that used the heat of the compressor to regenerate the desiccant (and thus saving energy and money). A third method of drying the desiccant, is with dry compressed air. typically found on reciprocating air compressor systems. All Rights Reserved. Their dual tower design allows you to time drying operations to a standard NEMA cycle, in which the one tower regenerates (purges) while the other performs the drying function. The QHD series of desiccant dryer systems includes 13 models that deliver between 230 and 3,400 CFM of clean, dry air at a pressure of 100 psig. Compared to desiccant air dryers, refrigerated air dryers tend to have: There are two types of refrigerated compressed air dryers: non-cycling and cycling. A 0.01 PPM polishing pre-filter removes large impurities, while the units specially designed purification cartridges contain a high-performance desiccant and after-filter that completely removes remaining water vapors. Photo: Atlas Copco. "@type": "Question",
A desiccant dryer uses energy and compressed air to regenerate spent desiccant materials. Our company is ISO 9001 certified, and our products are RoHS Compliant. Disposable desiccant dryers are intended for one-time use. This website requires Javascript for some parts to function propertly. There are two ways the desiccant can be regenerated: by hot air or by dried compressed air. First, why do you need a compressed air dryer at all? Join one of my courses on compressed air and air compressors. Install the QMOD air desiccant dryer horizontally or vertically for maximum flexibility. Regeneration costs: if you buy a hot-air regeneration-type dryer, consider the electricity costs used to heat the regeneration-air. Filter rating specifies the smallest particle size, measured in microns, that the filter can remove. Thats why its important to choose a machine from a manufacturer you can trust. As air passes through the towers, water vapor clings to the desiccant, effectively stripping it from the air until a desired moisture content is met. Quality along with past history. Whats the Difference Between a Refrigerated vs. Desiccant Compressed Air Dryer? Desiccant compressed air dryers work by removing water vapor from the air using adsorption. Self regenerative desiccant air dryers with built in 5 micron pre filter and 0.01 micron coalescing filter, are capable of flow rates from 2.9 CFM - 588 CFM and an option for -4F(20C), -40F(-40C), and -94F(-70C) outlet dew points. The system activates alumina which provides improved absorption, lower pressure drop and higher crush strength. These dryers can achieve lower dew points than refrigerated and membrane dryers, but also have lower air flow (cfm) capability. A desiccant air dryer system is an important component of any industrial operation in which compressed air of a uniform quality is required. But once you understand the differences between these types of air dryers and what they can do, the choice is likely to be clear. We measure moisture in pressure dew point (PDP). Most air dryers run off electrical power. After air has passed through the drying tower, a small amount is heated and blown down through the purge tower, where moisture is removed from the desiccant. Air Purifier Dryer - Designed to convert compressed air to breathable air for a safe work space. Types of desiccant that are often used are silica gel and activated alumina. Small desiccant dryer. We have several Quincy units for HVAC. Some power companies offer rebates for these dryers. These systems contain a large opportunity for: Regenerative desiccant air dryers use a porous desiccant that absorbs the moisture by collecting it in its pores, allowing large quantities of water to be retained by a small quantity of desiccant. Air is forced through the system at a maximum of 50 feet/second, with up to 5.5 seconds of desiccant contact time during the drying phase. Desiccant beads turn color to indicate they are saturated and ready to be replaced. Operation is similar to the QHD, with the distinction that purged air passes through a heater before beginning the regeneration process. Quincy desiccant dryers have ASME and CRN designed pressure vessels standard. In other words, air is required to have the same moisture level it would have at -40F. Desiccant air dryers are more expensive than refrigerated air dryers, both in their initial capital investment and in operating and maintenance costs. Just a first-class piece of equipment. The air dryer removes excess moisture from the air and reduces the. They control their temperature by the use of a hot gas bypass valve and cycling of the evaporator fan to maintain a tight temperature range. Nine configurations are available that can deliver between 850 and 3,400 CFM of dry air at 100 psig. If your application only requires dry air without any visible moisture present (ISO Quality Classes 4, 5 & 6), this type of air dryer will likely work for you. The beads turn color to indicate they are saturated and the unit is ready to be replaced. Liquid will tend to fall out of compressed air as it moves through the piping system and cools. This type of dryer consists of 1 rotating drum. Access My Account, Order History, Lists and more here. Desiccant compressed air dryers are also essential if your applications run in freezing conditions; refrigerated dryers are not capable of reducing the dew point low enough to avoid condensation freezing when operating at very low temperatures. These dryers are the most cost-effective and are typically very reliable while maintaining a fairly consistent dew point average of 38F (as long as its properly sized and maintained). use a thermal storage medium to store cooling capacity that can be used when the dryer is operating at less than full load. Also, standard with the desiccant dryers is a 2-year package warranty and a 5-year valve warranty. Every once in a while (controlled by a central control unit) the dryer switches towers. Gardner Denver's desiccant air dryers provide not only compression packages, but a full range of air treatment systems. Quincy machines use our proprietary Q-Sorb product, an enhanced formula derived from activated alumina that provides improved absorption, lower pressure drop and higher crush strength. Like the QHD series of products, these compact dryers use a portion of dried compressed air to regenerate the offline tower. Refrigerated dryers are typically oversized for summer conditions. What Is the Purpose of a Compressed Air Dryer? Correction factors can be found on the dryer literature allowing you to adjust the dryer size for your specific conditions. They are compact, lightweight, and do not require electrical power. Quality of a product and the excellent customer service. The compressed air is now dried by the second tower, while the first tower, filled with wet, saturated desiccant is dried. Compressed Air Solutions. Sophisticated electronic controls and regulators automate the cycle, making it worry- and maintenance-free. "name": "What is a Desiccant Air Dryer? Each Gardner Denver product has been designed to offer reduced energy usage or to include energy saving features. The product will be reserved for you when you complete your order. Any liquid water in the compressed air will quickly saturate all the desiccant, making it unable to do its job properly. These dryers are built and designed to provide the smallest footprint possible while ensuring maximum performance. "mainEntity": [{
My goal is to share knowledge about industrial air compressors and compressed air systems: to make compressed air understandable for everyone! Through years of research and experience, Gardner Denver knows what it takes to build the best dryers on the market. Desiccant compressed air dryers use desiccant beads to absorb water vapor. All standard dryers no matter what type have a design criteria of 100 deg. The standard measures the presence of solid particulate and oil (including vapor), and the dew point of the air. A sophisticated electronic diagnostic and control center puts cycle information and other useful tools right at your fingertips, keeping operation and maintenance safe and simple. Unless your application requires ultra-dry air or is operating in below-freezing temperatures, it is hard to justify the added capital investment and operating costs for a desiccant dryer. Because they are for continuous use, however, they can represent a significant operating expense over time.