Cookie Consent

Cookies are used for statistical purposes and to improve the site.
Cookies will be used after you click "Accept" or if you continue using
To find out more please review our Privacy Policy.


BP420 Series

The Model BP420 burst plugs are designed specifically for use in plastic extrusion systems. The Model BP420 will instantaneously rupture at a specific, predetermined pressure and temperature. Each one piece assembly consists of a 304 stainless steel body with a welded Inconel rupture disk. May be specified for primary relief in applications where pressure build-up can occur so rapidly that the response time of a relief valve is inadequate, such as in a polymerization reaction vessel.

  • Welded one piece assembly - no degradation of joint strength at elevated temperatures
  • Inconel rupture disk – stable through a wide range of temperatures
  • Burst pressure ranges from 1,000 to 15,000psi
  • Accuracy of ±10% of rated burst pressure at 300° – 750°F
  • Designed for melt temperatures up to 800°F (425°C)
  • Leak rate exceeds 1x10-6 standard cc/sec


ISO 9001 Certificate


Dynisco Product Portfolio

From breakthrough technology in the industry’s most complete line of sensors to renowned quality and performance in indicators, controls, and analytical instruments Dynisco has demonstrated the skill, experience and know-how that not only deliver the right solution for your unique application, but also provide unparalleled customer support.


Dynisco Online Shop Overview

Dynisco’s Online Shop is where you can have access to ordering all Dynisco parts from Polymer Testing Equipment to Sensors to accessories- all to optimize your application.

Sensor Portfolio Overview

At Dynisco, we offer a diverse portfolio of pressure transducers for your unique application. Whether you're looking for industry-leading accuracy and pressure capability, sustainability without sacrificing performance, or reliability on a budget, our sensors can be configured to fit your specific niche.

Have A Question? Ask a Dynisco expert for more information.

  • Dynisco

    38 Forge Parkway,
    Franklin MA 02038

    +1 508 541 9400  

  • Dynisco Europe GmbH

    Pfaffenstr. 21, 74078,
    Heilbronn, Germany

    +49 7131 297 0

  • Dynisco-Viatran Instrument Sdn Bhd

    Lot 3615, Jalan SM 6/8
    32040 Seri Manjung, Perak, Malaysia     

    +605 6884014