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An energy-free safety anti-backflow valve, for any fluid and any pressure

April 2020
Gallery Darf 1
Gallery Darf 1


Darf is a Low Tech innovation supported by a clever principle that has for main technical feature: simplicity & safety.

The DARF is very simple & reliable ; it is composed with: a valve to stop the fluid, a check valve to monitor the flow, an actuator to multiply the energy and a mechanical trigger to liberate the energy. Full mechanical. DARF's basic function is to avoid any backflow, but when going deeply in the solution we may note that this device can be used for other usages (and can ensure several functions) : protecting a network from any backflow (that is kept opened with or without any flow, it only checks the circulating way), closing a valve when a tank is full (it means it’s a self closing valve or a single way valve)… Hydrogen, nitrogen & oxygen industrial network will be covered with the first device that are under development. But this new concept could be scrutinized for evaluation in many fluid processes to check its added value (cost, reliability, independence, energy free…). It could be integrated in many fields such as : hydrogen or compressed air for mobility, water city network, clean&sterile fluid (food& pharma), medical devices, refrigerant fluids and other industrial purpose… DARF can be integrated with any kind & size of valve, any material, any pressure, any flow…

Label Date April 6, 2020
From France
Maturity stage Prototype testing 1:1 in the lab
Looking For Industrial Partnership; Support ; Visibility

The environmental benefits

  • Designed to protect the environment by reducing the probability of accident/incident

The Financial benefits

  • A payback in less than 3 years

Activity Region

  • /
  • Headquarters
  • Activity

Company Profile


New patented valve concept to avoid fluid backflows. A clever&simple energy-free safety device.

View company profile
Headquarters 49460 Feneu, France
Contact the Solution Provider Add to Favorites

The information set out above, is solely for the purposes of information and the Solar Impulse Foundation does not provide any guarantee as to its authenticity, completeness or accuracy. This information does not constitute investment advice or a recommendation to buy into, transact or to enter into any agreement with any of the parties or persons mentioned above. Potential investors or interested parties are solely responsible for their investment or business decisions and for performing any due diligence required by the circumstances. The innovator GUERRY INNOVATION has asserted ownership of the intellectual property rights for images, videos, and content showcased above, affirming full and unrestricted usage rights, and has provided explicit permission for the Solar Impulse Foundation to publish such information designated as "public" in the application form.