DHS 4.0 air-main charging systems

Air-main charging system

• Electronically controlled air-main charging system with pulse width modulation
• Incremental opening and closing of the compressed air network prevents excessive flow speed of the air in dryers and filters.
• Installation-ready complete system

Two operating modes

• 1 – "Reliable compressed air supply": pulse width modulated opening and closing of ball and butterfly valve
• 2 – "Reliable compressed air quality" for redundant air networks: in the event of faults in, for example, the dryer or filter, the concerned train is also shut-down (factory-preset)

Electronic control unit

Pivot drive

• Spring-loaded pneumatic pivot drive
• Activates the ball or butterfly valve with internal control pressure
• Silicone-free grease for ball and butterfly valve

Operation

Interfaces

• Relay inputs for "external shut-down" e.g. dryer alarm
• Relay outputs for "group alarm", "open", "closed" and "pressure monitoring"
• 4-20 mA air distribution network signal for compressor controllers or master control systems
• Connection prepared for remote operation
• Connection to compressed air network with Tecalan line (up to 16 bar included within scope of delivery)

Retrofit kits

• Provided to retrofit existing Kaeser air-main charging systems
• Kit comprises control unit and installation components

In order to ensure proper planning and to benefit from efficient and dependable compressed air system operation, the following should be taken into consideration: in addition to demand pressure and process air requirements, factors such as piping, cooling, ventilation, spatial conditions and environmental aspects should be included in the planning process. A well thought-out system design lays the foundation for effective operation later on. 

Generation, treatment and compressed air storage are essential components when it comes to the supply of compressed air. If the treatment components are overwhelmed by excessively high air flow rates, or if a treatment line is not effectively closed off in the event of a fault, unwanted contamination of the process air will occur. Moreover, unnecessary costs are incurred if the compressors also run at weekends in order to compensate for leakage losses.
With an air-main charging system from KAESER, these issues are a thing of the past.

Protect your components!

Since the network is often depressurised following periods of downtime, there is no flow resistance from the network pressure when the compressors are started. The compressed air treatment components in a compressed air supply system, however, are designed to accommodate the flow rates and speeds that occur in the distribution network when the system is in load operation. Therefore, without back-pressure present, there is the risk that filter and dryer components may become ‘overwhelmed’ by the sudden surge in airflow that occurs when the system re-starts. This can lead to filter element damage and to a raised pressure dew point in the refrigeration dryer. As a result, contaminants such as oil, particulate matter and humidity are introduced into the pipe distribution network and the process air.

Trouble-free production!

Electronic air-main charging systems also prove highly useful during system operation - and are even essential for stations with multiple treatment lines - because they help assure consistently high compressed air quality. If a fault occurs with a dryer or a filter, for example, the air-main charging system is able to shut down and isolate the affected treatment line. This not only assures consistent air quality, but also safeguards the pipe distribution network and the air consumers in your production facility.

The technical specifications can be found in this brochure:

• Air Main Charging Valve - Product Literature (PDF, 2.58 MB)