Válvula antirretorno ULTRA 20

Válvula antirretorno Ultra 20

Ficha técnica Solicitud de oferta

Válvula antirretorno para evitar la formación de mezclas de gas no deseadas, para caudales de hasta 80 m³/h (aire), hasta 16 bar, G 1", 1/2", 3/4"

  • elemento de seguridad: válvula antirretorno [NV]
  • cada válvula antirretorno se comprueba al 100%
  • DIN EN ISO 5175-2
  • muy bajas presiones de apertura (aprox. 4 mbar), pérdidas de carga extremadamente bajas
  • 52 X 67,5 mm, 510 g, G 1", 1/2", 3/4"
  • emisión mínima de ruido
  • filtro de impurezas (100 μm) en la entrada de gas

Este modelo también está disponible en acero inoxidable


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
  • in ambient temperatures above -20 °C / 68 °F and below +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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Válvula antirretorno ULTRA 20 de aplicación en las siguientes áreas:


David Sagarna

David Sagarna


+ 34 942-835142

Solicitud de oferta Solicitar llamada
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