PNEUDRI Zero Purge Compressed Air Dryers

PNEUDRI Zero Purge Compressed Air Dryers www.domnickhunter.com 1 PNEUDRI Zero Purge Compressed Air Dryers Compressed air contamination The Proble...
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PNEUDRI Zero Purge Compressed Air Dryers

www.domnickhunter.com

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PNEUDRI Zero Purge Compressed Air Dryers

Compressed air contamination The Problem Widely used throughout industry, compressed air is a safe, powerful and reliable utility which can be the most important part of any production process. All compressed air systems use atmospheric air, which is highly contaminated with dirt, water vapour, unburned hydrocarbons and bacteria. Additionally, the compressor can add wear particles and oil from its lubricating system. This can also apply to some types of oil free compressors. This oil is degraded, acidic and without lubricating properties. The compressed air distribution system can also add pipescale and rust. This combination of dirt, oil and water contamination mixes to become an abrasive sludge which rapidly wears pneumatic machinery, blocks valves and corrodes piping systems leading to:

Costly air leaks Breakdown of tools and machinery Production downtime Increased maintenance costs Product Spoilage Compromised health and safety Unpleasant working environment

Modern production systems and processes demand increasingly higher levels of air quality that require the elimination of moisture from the system to guarantee reliability of production processes and quality of finished products. Only desiccant dryers can provide totally dry and clean compressed air.

Even clean looking environments contain contamination

The efficient solution Reduce compressed air costs by up to 70% when compared to typical heatless desiccant dryers. PNEUDRI MAXIplus zero purge, vacuum heat regenerative dryers represent the most cost effective, energy efficient solution for the provision of high quality, clean, dry compressed air. Using patented domnick hunter technology, PNEUDRI zero purge dryers provide the ultimate in uncompromising performance, reliability and security for your compressed air system. Highest quality compressed air With a delivered air quality of -40ºC pressure dewpoint as standard, PNEUDRI zero purge dryers conform to ISO 8573.1 Class 1.2.1

Benefits

benefits

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Highest quality clean, dry and oil-free compressed air

Vacuum Technology

Zero Purge Guaranteed Zero air loss provides lowest operating cost. 100% utilisation of clean dry compressed air. No need for additional compressed air capacity. Low Cost Regeneration Energy savings are achieved due to low regeneration temperatures.

Less Energy is used during cooling, due to optimised vacuum circuit. Dewpoint Performance Reliable dewpoints down to –40ºC PDP

Two layered desiccant bed provides optimum dewpoint stability.

Long Service Life Extended service life of key components due to reduced temperature stress during operation.

Low pressure drop

Improved plant efficiency and process reliability.

Approved to international standards

Designed in accordance with ASME VIII Div 1, and CE marked (PED, EMC, LVD) as standard.

Easy and flexible installation Minimal space required.

Protects compressed air system

Moisture free systems increase reliability of processes, give a better quality of finished products and prevents damage to your compressed air system.

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PNEUDRI Zero Purge Compressed Air Dryers

How it works ▲

Compressed Air Outlet Ambient air Inlet valve (heating)

Heaters

Vacuum pump energised

Inlet valve (cooling)



Compressed Air Inlet

There are 5 stages in the operation of a PNEUDRI zero purge dryer

Drying - drying cycle Depressurisation Heating Cooling Re-pressurisation

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regeneration cycle

Compressed air enters the dryer inlet through Oil-Xplus high efficiency water separation and filtration, and flows through the on-line column where it is dried to -40ºC PDP. At the same time, the off-line column is de-pressurised prior to regeneration.

The vacuum pump is then energised and filtered ambient air is drawn in through the inlet valve (heating) and into the column undergoing regeneration. Now under vacuum, heaters warm the air to optimum regeneration temperature. The moisture held within the desiccant bed is removed and drawn out to atmosphere. Once the heating cycle is completed, the inlet valve (heating) is closed and the vacuum pump now draws in filtered ambient air through an inlet valve (cooling) in the reverse direction. This cool air reduces the temperature in the regenerating column to prepare it for the drying cycle. Finally, the regenerated column is re-pressurised prior to changing over to the drying cycle and the previously on-line column will now undergo regeneration.

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PNEUDRI - Designed for performance

Patented modular design

Efficient regeneration

Options

Potential for future plant expansion or 100% standby capability.

Vacuum technology increases regeneration efficiency.

Air and water cooled options available for high ambient humidity.

Compact, lightweight construction Space saving design is easy to install.

Snowstorm desiccant filling Consistent airflow and long desiccant life.

Corrosion protected Corrosion inhibited by alocroming and dry powder epoxy painting for extended lifetime.

DDS energy management system Controls dryer cycle times to match plant requirements.

User friendly control and monitoring Easy to read and operate control panel.

Quiet operation Vibration free vacuum pump.

-20ºC pressure dewpoint option available for general purpose applications.

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PNEUDRI Zero Purge Compressed Air Dryers

Electronic controller Featuring high performance electronic controls, domnick hunter PNEUDRI Zero Purge dryers represent the most efficient concept in compressed air drying technology. The state of the art electronic controllers offer “at a glance” system status from the user friendly display.

DDS energy management system Quantified energy savings Inlet and column pressure display Multi-language display Remote alarm facility Full diagnostics memory log and fault indication Real time status display Remote communications capability (option)

Supplied as standard with the proven Dewpoint Dependent Switching (DDS) energy management system. Regeneration requirements are dependent on flow, pressure and temperature. The DDS system allows the cost of drying compressed air to be matched exactly to the plant conditions. DDS controls the drying cycle by continuously measuring the loading under which the dryer is operating and optimises the energy input required. As dryers rarely operate at full rated capacity all of the time (eg during shiftwork and periods of low demand), this energy management system can provide considerable savings.

domnick hunter service A wide range of domnick hunter preventative maintenance programs are available Comprehensive worldwide service packages that can be tailored to match your exact requirements.

Benefits: Priority response to any service call Planned maintenance Trained specialists Global coverage

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Technical specifications Maximum operating pressure

11 barg (160psig)

Minimum operating pressure

4 barg (58psig)

Maximum inlet temperature

40ºC (104ºF)

Minimum inlet temperature

5ºC (41ºF)

Pressure dewpoint

-40ºC (-40ºF) pdp nominal -20ºC (-4ºF) pdp optional

Noise level