DatasheetDynisco BP420 Burst Plugs
The Dynisco BP420 burst plugs are reliable pressure-relief devices designed specifically for plastic extrusion systems. They provide emergency relief when excessive pressure occurs in a process system. Burst plugs, also known as rupture disks, open at a defined, predetermined pressure to protect the process and equipment from critical pressure build-up.
The 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. The disk is flush with the tip of the burst plug, leaving no cavity for product build-up.
A burst plug may be used as primary relief in applications where pressure build-up can occur so rapidly that the response time of a relief valve is inadequate, for example in polymerization reaction vessels. All burst plugs are tested at rated burst pressure and temperature. In addition, the markings on the burst plugs are laser engraved, clearly visible, and each unit is labeled and shipped with protective packaging.
| Type | Burst plug / rupture disk for pressure relief |
|---|---|
| Series | Dynisco BP420 |
| Model | BP420 |
| Application | Pressure relief in plastic extrusion systems, polymer processing and process plants |
| Function | Reliable emergency relief of excessive process pressure |
| Rupture behavior | Instantaneous rupture at a specific predetermined pressure and temperature |
| Design principle | Welded one-piece assembly with 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 pressure ranges | 1,000 to 15,000 psig |
| Accuracy / burst tolerance | ±10 % of rated burst pressure at 300…399 °C / 572…750 °F |
| Leak rate | Exceeds 1 × 10-6 standard cm³/s |
| Testing | All burst plugs are tested at rated burst pressure and temperature |
| Marking | Laser engraved, clearly visible and permanent |
| Packaging | Each unit is labeled and shipped with protective packaging |
| 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 | Welded one-piece assembly, Inconel rupture disk, flush design without product build-up, high reliability, defined burst performance |
