Posted in | Pressure Sensors

BP420 Series Burst Plugs

The Model BP420 burst plugs from Dynisco have been particularly developed for use in plastic extrusion systems. These burst plugs will rupture instantly at a predetermined, specific temperature and pressure.

Each one-piece assembly features a 304 stainless steel body with a welded Inconel rupture disk. It could be designated for primary relief in those applications where pressure buildup can take place so quickly that the response time of a relief valve becomes insufficient, for example, in a polymerization reaction vessel.


  • A precision of ±10% of rated burst pressure at 300° to 750°F
  • Welded one-piece assembly—joint strength is not degraded at increased temperatures
  • Burst pressure varies from 1,000 to 15,000 psi
  • Inconel rupture disk—stable across a broad range of temperatures
  • Leak rate surpasses 1 x 10−6 standard cc/second
  • Developed for melt temperature ranges of up to 425°C (800°F)

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