Nitrogen generator I hydrogen generator I zero air - clean air I air dryer I chillers I application guide

Air dryers Lufttørrer / Luftrenser		MD Scientific er autoriseret forhandler i Danmark for F-DBS

The need for clean, dry air

Compressed air is an important source of energy that is widely used throughout industry. This safe and reliable utility is often the most important part of a production process.

However, atmospheric air contains water vapour, which condenses to water droplets when the compressed air cools.

Water and dirt in compressed air causes a major inconvenience and cost 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.

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NEW series of dryers (NDL)	Adsorption dryer Air dryer without CO2	Refrigeration dryer	Membrane dryer

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NEW series of dryers (NDL) Download leaflet

Benefits

Guaranteed performance
- The dryer meets the highest standards of purity and delivers air in accordance with ISO 8573:1 – 2001, Class 2 dirt (1 micron) and Class 2 water (-40°C pressure dewpoint).

Reliability
- Condensate collected in bottom of dryer column is vented with every dryer cycle
- Removal of condensate by timed solenoid valve improves reliability
- Small amounts of condensate are exhausted frequently, eliminating the risk associated with fl oat drain malfunction
- Purge adjustment screws are located after fi ne dust fi ltration, eliminating the possibility of contamination and loss of performance

Reduced energy
- Probably the most energy efficient product of it’s type*
- Elimination of external filters and improved design reduces pressure drop through the dryer by 60%*
- 7.8% less energy consumed by the compressor
- 20% less purge air for regeneration*
- *As compared to comparable desiccant air dryers with external filtration

Simplified maintenance
- Integral fi lter/desiccant cartridge can be easily exchanged with no need for special tools
- Less than 15 minutes gets you back on line quickly

 

The Solution All of these costly problems can be avoided by installing a F-DBS ultra high purity, desiccant air dryer. To ensure both clean and dry compressed air, F-DBS offers a new, state of the art range of adsorption air dryers. Designed to deliver clean air to the point of application, they are – unlike many types of dryers in the market – designed for continuous operation. The advanced design is highly innovative – utilising modern materials and incorporating new, patented features to deliver high quality compressed air continuously, with increased reliability, lower running costs and simplifi ed maintenance procedures.
How it works The F-DBS dryer uses the pressure swing adsorption principle of drying compressed air, utilising two identical columns each containing a hygroscopic desiccant bed. Wet air from the compressor after-cooler enters the dryer through a shuttle valve (a) and is directed into one of the desiccant columns. Each column contains a unique (and patented) desiccant cartridge which incorporates inlet and outlet filtration. Bulk liquids (water) and particles are removed by the filtration/separation stage (b) which is located on the inlet to the cartridge. Water is retained in a “quiet zone” until the column is regenerated (when it will be vented to atmosphere as the column is depressurised). Following the filtration stage, air passes through the desiccant bed (c) where any remaining moisture is adsorbed. After drying, the air passes through a particle filter (d), which retains any remaining desiccant particles that may have been carried through the system (<1 micron / ISO 8573.1 class 2 for dust). Simultaneously, a small amount of dry air is counter-flowed down through the other cartridge and exhausted to atmosphere, removing the moisture and thus regenerating the desiccant. The dryer is controlled by a PLC which periodically switches the solenoid valves when the compressor is running, reversing the function of each column and therefore ensuring the continuous supply of dry air .

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Adsorption dryer Air dryer without CO2

Characteristics / Benefits

• Air quality obtained: ISO8573.1 Class 1.2.1: dewpoint - 40 ° C; HCs (not CH4) <0.01 ppm; Particles <0.1 micron
• Easy maintenance: is to change the filters and desiccant cartridge form. Maintenance alarm.
• Protection of analytical instruments
• Enhanced Security
• Greater savings
• Easy Installation

  

APPLICATION

A supply of dry compressed air, clean, free of all contaminants is essential in a laboratory.

Particles, water, oil may be present in compressed air causes rapid wear of the equipment and affect the performance and lifetime of the analytical equipment.

Air dryers are ideal for laboratories, providing the point of use compressed air clean and dry according to the current standard ISO 8573 Class 1.2.1 .1. For:

• GC-FID, NMR, AA, DTA, Rheometers, ELSD
• Upstream of a zero air generator so air does not own network
• Upstream of a nitrogen generator system if the air is not clean
• Autosampler
• Preparer samples

Operating principle 

The technology used to obtain a completely clean and dry air is the pressure swing adsorption (PSA).

The dryers consist of two columns of desiccant or the air is dried to the dew point desired. While one column is in the drying phase (adsorption), the other column is dried (desorption).

Operation and automatic regeneration, including pre and post filtration and purging condensate.

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Air dryer without CO2

CHARACTERISTICS / BENEFITS

• Air quality obtained: ISO8573.1 Class 1.1.1: dewpoint - 70 ° C; HCs (not CH4) <0.003 ppm; Particles <0.1 micron
• CO2 <1 ppm
• Easy maintenance: is to change the filters and desiccant cartridge form. Maintenance alarm
• Improved performance of analytical instruments: significantly reduces background noise for techniques such as FT-IR. Protection against moisture sensitive optical and gas purge.
• Enhanced Security
• Greater savings
• Easy Installation
• Tested and approved by most manufacturers of TOC and FT-IR

APPLICATION

Air dryers without CO2eliminate the need for oxygen cylinders by purifying the air existing instruments to provide quality air without CO2 with a dew point below - 70 ° C. and without particles.

The CO2-free air dryers are the ideal solution for laboratories to:

• TOC analyzers
• The purge of the FT-IR
• The Purge Microscopes

Operating principle

The technology used to obtain a completely clean and dry air is the pressure swing adsorption (PSA). The dryers consist of two columns of desiccant or the air is dried to the dew point desired. While one column is in the drying phase (adsorption), the other column is dried (desorption).

Operation and automatic regeneration, including pre and post filtration and purging condensate.

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Refrigeration dryer

CHARACTERISTICS / ADVANTAGES

• Safe for the environment: Indeed, the refrigerant R134a is harmless and nonpolluting
• Compact: Easy to install, space saving
• Easy maintenance: front access to all elements
• Integrated MFD
• Automatic drain

APPLICATION

The refrigeration dryer can handle the air from a compressor by lowering the dew point of water at 3°C and thus protect the nitrogen generator. The refrigeration dryer ensures air quality complies with 8573.1 Class 1.4.1.

We recommend the dryer if the fridge:

• Using a non-lubricated compressor
• La pure nitrogen does not exceed 99.5%

If lubricated compressor, we strongly recommend the use of a desiccant dryer

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Membrane dryer

CHARACTERISTICS / ADVANTAGES

• Compact: Easy to install, space saving, wall.
• No power consumption
• Silent: no noise expansion
• Advised at the application provided that the network is non-lubricated air
• Lowering the dew point of -20 ° C at the point of application
• Low air loss: between 10 and 15%

APPLICATION

We recommend the dryer membrane:

Lower the dew point of -20 ° C air at the point of application for analytical instruments requiring humidity not too high

Operating principle

The chain begins with the purification filter separator air / water (SFPE). It retains the coarser particles by a sieve effect and the water droplets and oil separation effect by a hurricane. This filter protects the SMF submicrofiltre high efficacy against coarse contaminants. Air from the submicrofiltre enters the air dryer and built through the center of a bundle of microporous membranes. These membranes allow the retention of moisture in the air while the air passes through the center of the bundle of membranes. A portion of dry compressed air is used against common outside of the beam to cause the separated water to the outside of the dryer. The air produced lots to be used directly or switch to another processing stage (Sfakes charcoal filter to remove oil vapors if any). The purified air exits the dryer operating pressure of the network.

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Application guide

 

MD Scientific ApS • Denmark • tlf. 7027 8565 • fax 7027 8566 • info@md-scientific.dk