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Protecting compressed air quality - no overwhelming of the air treatment system
Compressed air treatment systems are designed for a certain rate of air flow which, when the system is operating at full load, pushes against the pressurized air in the air distribution network. However, should this resistance not be present, for example during periods of low load or downtime, it is possible that dryers and filters may be "overwhelmed" by the sudden surge in airflow that occurs when the system re-starts. DHS air-main charging systems reliably prevent this from occurring.
Unit of Measure

Specifications

Brands

 N/A Kaeser Compressors

Model

 N/A DHS

Connection Size

 N/A 4 in

Connection Type

 N/A Flange

Maximum Working Temperature

 N/A 140 ºF

Maximum Working Pressure

 N/A 232 psig

Width

 N/A 11.8 in

Depth

 N/A 7.3 in

Height

 N/A 21.5 in

Weight

 N/A 31 lb

Direct Current Voltage

 N/A 24 V

Power Supply

Voltage

 N/A 115 V

Phase

 N/A 1

Frequency

 N/A 60 Hz

Advantages

Advantages

 N/A
  • Protection from impermissible air flow:
    With dropping pressure, the speed of flow in the pipework will quickly increase and potentially cause an overload of all air system components. The installation of a Kaeser DHS air-main charging system guarantees the required minimum pressure and ensures reliable operation, and in particular when re-starting the system following a shut-down.
  • Gentle pressure build-up in the system:
    A pulse width modulated control designed by Kaeser ensures that system intervention opening and closing sequences are performed in very small steps.
  • A brilliantly simple operating concept:
    Easy configuration in 25 languages, immediate recognition of the operating state, manual emergency-stop - time-saving features that also increase safety.

Kaeser Life Cycle Management

Kaeser Life Cycle Management

 N/A Even the best components are only as good as their integration into the overall system. With Kaeser, you benefit from individual consultation and intelligent technology that can be used universally and expanded as required.

Equipment

Air-Main Charging System

 N/A
  • 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

 N/A
  • 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

 N/A
  • Integrated electronic pressure transducer
  • Pressure reducer 0 - 16 bar
  • High-visibility LED
  • Mechanical indicator
  • Processor unit
  • Display (25 languages)
  • Password protection
  • Mode selector switch
  • Control unit can be rotated by 90°
  • End position monitoring
  • Software update with microSD card
  • Anti-tamper seals for keyboard and operating mode switch to protect against unauthorized access
  • Multi-voltage: 90 - 260 V AC, 47 - 63 Hz, 24 V DC

Pivot Drive

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

Operation

 N/A
  • Password and operating parameter input via keyboard, e.g. opening pressure, hysteresis, opening/closing times in percent
  • Manual operation using key to open in the event of power failure or disruption

Interfaces

 N/A
  • 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

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

Additional Information

Additional Information

 N/A Thanks to a patented pulse width modulating control concept, every DHS air-main charging system is ready-prepared for all eventualities and, as is Kaeser's way, combines exceptional operational reliability with straightforward operation.
  • Connection diameters from 1" NPT to 2" NPT and 2" flange to 8" flange
  • Larger sizes available; please consult Kaeser.
  • For systems with one or more treatment lines
  • Perfect integration thanks to various interfaces, configuration options and retrofit kits
Velocity control improves air treatment

Kaeser's air main charging valve reduces exposure to excessive velocity by automatically opening and closing to maintain a set minimum pressure in the supply side of the air system while charging the main distribution piping. This prevents damage and increases the effectiveness of air treatment equipment. It also pressurizes the entire air system in the shortest possible time.

Why your system needs a DHS charging valve
Compressed air dryers and filters are designed and rated to treat specified volumes of air at specific conditions. A refrigerated dryer, for example, is rated to achieve a specified dew point at a particular volume (scfm), pressure (100 psig), compressed air temperature (100 ºF), and ambient temperature (100 ºF).
If system pressure is not constant, the air velocity through clean air treatment equipment will fluctuate. For those operating 24 hours a day, fluctuation may be minor. If, however, compressors are shut down for any length of time (overnight, weekends, holidays), system pressure will drop significantly as air escapes through leaks. Until full, or near full, operating pressure is reached, dryers and filters may not work to specification and contaminants may be swept downstream.

Air quality protection
An air main charging valve controls high velocity air while an air system is being pressurized. After the air system has been pressurized, the air main charging valve also prevents exposure of air treatment components to possible overflow conditions. Leaks, artificial demand, and unregulated uses all affect the total demand for air. When this total demand reduces the system pressure, the increased air velocity may greatly reduce the effectiveness of air treatment components. A DHS charging valve prevents this condition, ensuring that dryers and filters will be able to operate according to their rated specifications.

Note

Note

 N/A High pressure models available - consult factory.

Specifications are subject to change without notice.
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