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Safety overload valve SI2

APV SI2 Safety valve

The spring-loaded full-stroke SI2 safety valve is approved for fluids and gases in food or chemical production to protect tanks and vessels against overpressure. Prevents the permissible working pressure from being exceeded by 10%. If, after opening, the adjusted response pressure falls below 10% (gases) and 20% (liquids), the valve closes.


  • Type: pneumatic or manual seat lift
  • Dimensions: DIN DN25-100
  • Pressure range: 0 - 10 bar, opening and closing at 10% of set pressure
  • Product contact: stainless steel AISI 316L / 1.4404 (DIN EN 100888) parts


  • The hygienic design and functions are TÜV certified for liquids and gases. They meet the requirements of standards for pressure vessels.
  • Optional: Pneumatic valve seat lift is equipped with non-contact limit switches for feedback signals.
  • Ideal for CIP cleaning.
  • All parts in contact with the product are polished to Ra ≤ 0.8 μm.
  • Quick replacement of seals due to easy access. All parts are marked.

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