Clapet anti-retour ULTRA 20, Acier inoxydable |

Clapet anti-retour ULTRA 20, Acier inoxydable

Clapet anti-retour ULTRA 20, Acier inoxydable

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Protection ultra performante contre les retours de gaz:compact, silencieux, idéal pour les applications basse pression. Pression d'ouverture de 4 mbar environ, jusqu'à 16 bar, G 1, G 3/4"

  • composant de sécurité: clapet anti-retour [NV]
  • chaque clapet anti-retour testé à 100%
  • DIN EN ISO 5175-2
  • pressions d'ouverture ultra-basses (approx. 4 mbar), chute de pression ultra-basse
  • compact et léger : 35 X 60 mm, 221 g, G ½"
  • émission sonore minimale
  • filtre à poussière (100 μm) en entrée
  • idéal pour les applications basse pression comme le traitement thermique, le biogaz etc


WITT non-return valves for reliable protection against dangerous reverse gas flow. Flow-optimised valve system causes very low pressure drop at minimal noise emission. Every non-return valve 100% tested.


  • a spring loaded non-return valve prevents back feeding of gases which could lead to unwanted gas mixtures
  • low pressure drop – using complex valve assembly with low opening pressures (ca. 4 mbar)
  • stainless steel filter (100 μm) in the gas inlet protects the non-return valve against dirt contamination, extending the service life
  • flow-optimised valve system for:

           - ultra low pressure drop

           - minimal noise emission

  • no leaks – using of a spring loaded valve assembly with elastomer sealing
  • in accordance to DIN EN ISO 5175-2
  • available in brass or stainless steel
  • diverse applications – useful for many technical gases
  • reduce installation costs – the spring loaded valve is not affected by gravity and may be installed in any orientation
  • the same size as model NV200 for easy replacement

Operation / Usage

  • non-return valves are used to protect equipment and pipelines against dangerous reverse gas flow.  Use is possible for applications according to EN 746-2
  • WITT non-return valves may be mounted in any position / orientation
  • the maximum ambient / working temperature is 70 °C / 158 °F


  • annual testing of the non-return valve and body leak tightness is recommended
  • WITT is happy to supply special test equipment
  • non-return valves are only to be serviced by the manufacturer

Company certified according to ISO 9001 and PED 2014/68/EU Module H
CE-marked according to PED 2014/68/EU
Cleaned for Oxygen Service according to: EIGA IGC Doc 13/12/E: Oxygen Pipeline and Piping Systems


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Clapet anti-retour ULTRA 20, Acier inoxydable est utilisé dans les domaines suivants :


Laurent Michon

Laurent Michon

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+33 (0)160-151779

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