AV 619-ES: 5 – 500 mbar

Stst. Thread sizes: 1/2", 3/4" & 1" BSP & NPT RH Female

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  • individual opening pressure
  • TÜV-certification of pressure setting
  • ideal for corrosive gases
  • sealing material to suit gas or at customer’s request
  • also available with FDA-approved elastomers (USP class VI)
  • compact size for easy, problem free installation
  • range of inlet and outlet connections (including flange)
  • adapter for connection to ventilation pipe
  • free of oil and grease

Item #: 9484
Quantity Available: 100

100 in stock


Opening pressure from 5 to 500 mbar!

Thread sizes: 1/2″, 3/4″ & 1″ RH Female

The WITT safety relief valve AV619-ES is used to avoid the lowest overpressure.

The vital benefit compared to competitive products is its high accuracy response in the range from 5 to 500 mbar the special valve makes it possible to control even the smallest increases in pressure. This low opening pressure in combination with a fair price makes this device almost unrivaled. It is used in many different applications.

By blowing off the gas the pressure in the receiver and pipeline is relieved reliably before reaching the operating limit. Sensitive systems can thus be protected from expensive damage. If required the factory preset opening pressure can be tested and certified by the TÜV. By using different material combinations and depending on customer’s requirements the AV619 is suitable for a wide temperature range from -40 to +300 °C. It can be used for nearly all technical and corrosive gases and has various input and output connections available. The AV619-ES safety valve measures 52 mm by 70 mm for easy installation and is the perfect solution for many different applications, e.g.:

For protective atmospheres

  • in furnaces for heat treatment of metal
  • in the optical industry for transport containers of high-tech components
  • in the production of solar cells
  • for Selective Laser Melting (SLM)

In the chemical and pharmaceutical industry

  • in receivers or pipelines with toxic or corrosive gases

A brass version is also available (AV619)


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