Over-and-Under-Compression Valves

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CHARLY - the protection system for your silo

The pressure balancing valve protects containers or silos with pneumatic filling from overpressure - but also from a vacuum caused during the discharging process.
The application of these valves is governed by the accident prevention regulations.


  • Overpressure +45mbar
  • Underpressure -5mbar
  • Special pressure on request
  • With TÜV (safety standards authority, option)
  • Overpressure sensor (option)


  • Model in stainless steel 1.4301/304
  • Compact and easy
  • Variable integration possibility: horizontal to vertical
  • Modular system
  • Completely ready for connection

 Fields of application

  • These models are especially suited for all containers which are filled via a
    pneumatic pressure conveyor system
  • Due to the stainless steel design, the valves can be used in all
    industries ranging from the building trade to the pharmaceutical industry
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