Burst Plugs

A burst plug (or rupture disk) in extrusion serves as a critical safety device designed to relieve excessive pressure in an extruder barrel. It acts as a fail-safe mechanism to protect equipment and personnel from dangerous overpressure situations.

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Purposes of a Burst Plug in Extrusion

1. Pressure Relief: If the pressure inside the extruder barrel exceeds a safe limit, the burst plug ruptures, releasing material and preventing damage to the extruder.

2. Equipment Protection: Prevents damage to screws, barrels, and dies by avoiding excessive pressure buildup.

3. Operator Safety: Reduces the risk of explosions or hazardous material leaks.

4. Cost Savings: Helps avoid expensive repairs and downtime caused by equipment failure due to overpressure.

 

How Burst Plugs Work as a Backup for Melt Pressure Transducers and Transmitters

• Primary Monitoring: Melt pressure transducers and transmitters continuously measure and report pressure levels inside the extruder.

• Backup Mechanism: If the transducers fail, misread, or do not detect a dangerous pressure increase in time, the burst plug provides an automatic and immediate response by rupturing at a pre-set pressure threshold.

• No Electrical Dependency: Unlike pressure transducers, which require power and signal processing, burst plugs function mechanically, making them reliable in case of electrical or sensor failure.

• Prevents Catastrophic Failure: In the event of a sensor malfunction, the burst plug ensures that excessive pressure is safely relieved rather than causing a major breakdown.

 

Typical Placement in an Extrusion System

• Installed near the die or in the barrel, often close to where the melt pressure transducer is positioned.

• Set to rupture at a slightly higher pressure than the normal operating range but below the maximum pressure limit of the system.

NoNonSensors rupture disks directly replace the part numbers below as well as hundreds of other combinations!
 

Gefran Burst Plugs                  

GRD2500-1.8

GRD3000-1.8

GRD3500-1.8

GRD5000-1.8

GRD5500-1.8

GRD7500-1.8

GRD8500-1.8

GRD9500-1.8

GRD10000-1.8

GRD12000-1.8

GRD15000-1.8

GRD2500-6.0

GRD3000-6.0

GRD3500-6.0

GRD5000-6.0

GRD5500-6.0

GRD7500-6.0

GRD8500-6.0

GRD9500-6.0

GRD10000-6.0

GRD12000-6.0

GRD15000-6.0
 

Dynisco Burst Plugs

BP420-1/2-3M-6

BP420-1/2-4M-6

BP420-1/2-5M-6

BP420-1/2-5.5M-6

BP420-1/2-7.5M-6

BP420-1/2-8.5M-6

BP420-1/2-9.5M-6

BP420-1/2-10M-6

BP420-1/2-3.5M-1.81

BP420-1/2-5.5M-1.81

BP420-1/2-7.5M-1.81

BP420-1/2-9.5M-1.81

BP420-1/2-10M-1.81