HAM-LET® H-900HP High Pressure Relief Valve

The Ham-Let® H-900HP is a series of relief valves for high pressure service.

The valve is normally closed.

The high pressure relief valve will open when the system pressure reaches the set level. It will re-close when the system pressure fall below the set level.

Setting and Resealing Pressure

  • Upstream set pressure is the first indicator of flow process. Every pressure relief after the first is repeatable within a deviation of 5% at room temperature.
  • Blocked upstream set pressure is the first indicator of a stopped flow process and is always lower than the set pressure.


  • The H-900HP high pressure relief valve design has been tested for Proof and Burst.
  • Every valve is factory tested for proper set and resealing performance.

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