BP420 - Burst plugs
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 Assembly
Inconel Disk
Pressure Range
±10% Accuracy
Low Leakage
Process Insights
BP520 - Burst plugs with indication
The BP520 series of pressure fuses have a "pop-up" indicator cap. A fine conductor passes through the construction of the fuse and the indicator cover of the part, which, when the fuse is activated or by emergency release of pressure, pushes out the fuse cover and thus disconnects (ruptures) the tested conductor.
Welded Assembly
Threaded Body
Rupture Disk
Up to 300°C
Iconel Disk
1000 - 15000 PSI
±10% Tolerance
±1% Deviation
Leak Tested
Thread Verification