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Precise Overpressure Protection with WITT ULTRAVENT

WITT ULTRAVENT millibar pressure relief valves provide precise overpressure protection for gaseous media from 5 to 500 mbar. If the set pressure is exceeded, the valve automatically releases excess gas and closes again once a safe pressure is restored.

Designed for reliable, repeated operation, ULTRAVENT valves help protect equipment, processes and personnel. TÜV type-approved models from 100 to 500 mbar comply with DIN EN ISO 4126-1 and offer a reusable alternative to burst discs.

  • AV919: 5-500 mbar, 2", DN40AV919: 5-500 mbar, 2", DN40
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    WITT

    AV919: 5-500 mbar, 2", DN40

    Opening pressure from 5 - 500mbar. Housing Aluminium (also available in stainless steel) Thread size: 2" BSP RH Female, 2" NPT female, DN 40 The WITT safety relief valve AV919 is used to avoid the lowest overpressure. The vital benefit compared to competitive products...
  • AV619-ES: 5-500 Mbar ¾″ & 1" BSP & NPT, DN25AV619-ES: 5-500 Mbar ¾″ & 1" BSP & NPT, DN25
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    WITT

    AV619-ES: 5-500 Mbar ¾″ & 1" BSP & NPT, DN25

    Opening pressure from 5 to 500 mbar! Thread sizes: G3/4, G1 RH F 3/4", 1" NPT F flange DN 25 according to DIN 28403 The WITT safety relief valve AV619-ES is used to avoid the lowest overpressure. The vital benefit compared to competitive products...
  • AV919-ES: 5-500 mbar, 2", DN40AV919-ES: 5-500 mbar, 2", DN40
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    WITT

    AV919-ES: 5-500 mbar, 2", DN40

    Opening pressure from 5 - 500mbar. Housing stainless steel (also available in Aluminium) Thread size: 2" BSP RH Female, 2" NPT female, DN 40 The WITT safety relief valve AV919 is used to avoid the lowest overpressure. The vital benefit compared to competitive products...
  • ULTRAVENT 6: G⅛ & ⅛" NPTULTRAVENT 6: G⅛ & ⅛" NPT
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    WITT

    ULTRAVENT 6: G⅛ & ⅛" NPT

    Precise pressure control from 5 to 500 mbar Spring-loaded, direct-acting safety relief valve for venting excess pressure from receivers, pipelines and other equipment. Extremely compact, safe and reliable. Every valve is 100% factory-tested. Benefits • Closes tightly again after activation• Precisely adjustable opening pressure...
  • AV 619: 5-500 Mbar ¾" & 1" BSP & NPT, DN25
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    WITT

    AV 619: 5-500 Mbar ¾" & 1" BSP & NPT, DN25

    Opening pressure from 5 to 500 mbar! Thread sizes: G3/4, G1 RH F 3/4", 1" NPT F flange DN 25 according to DIN 28403 The WITT safety relief valve AV619 is used to avoid the lowest overpressure. The vital benefit compared to competitive products...
  • ULTRAVENT 6-ES: G⅛ & ⅛" NPTULTRAVENT 6-ES: G⅛ & ⅛" NPT
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    WITT

    ULTRAVENT 6-ES: G⅛ & ⅛" NPT

    Precise pressure control from 5 to 500 mbar Spring-loaded, direct-acting safety relief valve for venting excess pressure from receivers, pipelines and other equipment. Extremely compact, safe and reliable. Every valve is 100% factory-tested. Benefits • Closes tightly again after activation• Precisely adjustable opening pressure...
  • ULTRAVENT 15: G½ & ½" NPTULTRAVENT 15: G½ & ½" NPT
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    WITT

    ULTRAVENT 15: G½ & ½" NPT

    Precise pressure control from 5 to 500 mbar Spring-loaded, direct-acting safety relief valve for venting excess pressure from receivers, pipelines and other equipment. Compact, safe and highly reliable. Every valve is 100% factory-tested. Benefits • Closes tightly again after activation• Precisely adjustable opening pressure...
  • ULTRAVENT 15-ES: G½ & ½" NPTULTRAVENT 15-ES: G½ & ½" NPT
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    WITT

    ULTRAVENT 15-ES: G½ & ½" NPT

    Precise pressure control from 5 to 500 mbar Spring-loaded, direct-acting safety relief valve for venting excess pressure from receivers, pipelines and other equipment. Extremely compact, safe and reliable. Every valve is 100% factory-tested. Benefits • Closes tightly again after activation• Precisely adjustable opening pressure...

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