DHS 4.0 air-main charging systems

Two operating modes

• 1 – “Priority compressed air quality”, Pulse-width modulated opening and closing of ball valve and butterfly valve for efficient and proper operation of the compressed air supply.
• 2 – "Priority compressed air quality" for redundant compressed air networks: in the event of dryer or filter faults, for example, closes off the affected line (set ex works)

Electronic control unit

• Integrated electronic pressure sensor
• Pressure regulator 0 – 232 psi
• High-visibility LED
• Mechanical indicator
• Processor unit
• Pressure monitoring
• Display (25 languages)
• Password protection
• Operating mode selection switch
• Control unit can be rotated 90°
• Endpoint monitoring
• Software update via microSD card
• Anti-tamper seals for keyboard and operating mode switch to protect against unauthorized access
• Multi voltage: 100 – 240 V AC, 50/60 Hz or 24 V DC

Pivot drive

• Spring-loaded pneumatic pivot drive
• Activates the ball or butterfly valve with internal control pressure
• Silicone-free grease (standard) for ball and butterfly valve. Silicone-free is an option.

Operation

• Password and operating parameter input via keyboard, e.g. opening pressure, hysteresis, opening/closing times in percent
• Can be integrated into a master control system
• Manual operation using key to open in the event of power failure

Interfaces

• Floating inputs for "external shut-down" e.g. dryer fault
• Floating outputs for "group alarm", "open", "close" and "pressure monitoring"
• 4-20 mA air distribution network signal for compressor controllers or master control systems
• Connection for remote operation
• Modbus-TCP communications interface with M12 plug-in connection.

Ball valve or butterfly valve

Endpoint mounting capability simplifies remodeling or expansion of the compressed air distribution network. It also facilitates alignment and securing in the pipeline for easy installation.

SIGMA NETWORK

The DHS 4.0 is equipped as standard with a SIGMA NETWORK interface to make operation even more convenient.

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)