DatasheetDynisco BP520 Burst Plugs with Burst Indication
The Dynisco BP520 burst plugs are custom pressure-relief assemblies with integrated pop-top burst indication. They are used as reliable emergency pressure-relief devices when excessive pressure occurs in a process system. The burst plugs, also known as rupture disks, are particularly suitable for extruder and polymer processing applications.
The BP520 is installed in barrel bodies with hex ends. The hex OD across flats is larger than the burst plug body and supports the assembly. A metal retainer strap is held in place by the hex and the metal T-shaped cap is fastened to the other end of the strip. A 2 mm hole is drilled through the body and cap, allowing the burst indicator wire to pass through the assembly.
When the rupture disk bursts, the T-cap pops open, shearing off the burst indication wire and indicating the burst event to the control system. Each welded assembly consists of a threaded tubular body with an Inconel rupture disk welded onto the process end. This one-piece welded design prevents degradation of joint strength and ensures stable performance across a wide range of temperatures.
| Type | Burst plug with integrated burst indication |
|---|---|
| Series | Dynisco BP520 |
| Model | BP520 |
| Application | Pressure relief and burst indication in extruders, polymer processing and process systems |
| Function | Reliable emergency pressure relief in overpressure conditions |
| Burst indication | Pop-top burst indicator with burst wire for signalling to the control system |
| Design principle | Welded assembly with threaded body and welded rupture disk |
| Body material | 304 stainless steel |
| Disk material | Inconel |
| Disk size | 3/16″ / 4.8 mm |
| Process connection | 1/2-20 UNF-A threaded |
| Burst ratings | 750 to 15,000 psig; for higher pressures contact Dynisco |
| Accuracy / burst tolerance | ±10 % at 300…399 °C / 572…750 °F |
| Typical standard deviation | ±1 % |
| Leak test | 100 % leak tested |
| Thread verification | 100 % electronic thread verification |
| ISO | ISO 4126-6:2003(E) |
| CE / PED | PED 97/23/EC, modules B & D |
| Burst certification | Each unit is test burst certified |
| Mounting torque | Not to exceed 300 in/lbs |
| Test note | Burst testing is carried out at ambient temperature and then chart compensated using a certified temperature correction factor |
| Key features | Pop-top burst indication, Inconel rupture disk, welded one-piece assembly, high reliability, 100 % testing |
