Rupture Disks

BP420 - Burst plugs 420

BP420 - Burst plugs

Model BP420 overpressure plug is specially designed for use in plastic extrusion systems. Blanking plugs (also known as burst fuses) are designed for reliable, emergency release of excessive pressure in the system.
BP 420 models rupture at a specific, predetermined pressure and temperature. These pressure plugs consist of a body made of stainless steel and a membrane coated with an inconel layer. The diaphragm is supported by a tip that ensures rupture during and overpressure release if necessary. In practice, there are situations where the pressure rises so rapidly that the response time of the safety valve may be insufficient, for example in a polymerisation reaction vessel. All safety plugs are tested at nominal pressure and burst temperature. Laser-assisted markings are marked on the blanking plugs, making them more visible, and each blanking plug is marked and supplied with a protective cover.

BP420 - Burst Plugs Dynisco

BP420 - Burst Plugs Dynisco

BP420 - Burst Plugs Dynisco

BP420 - Burst Plugs Dynisco

BP420 - Burst Plugs Dynisco

BP420 - Burst Plugs Dynisco

Inquiry system 

Configure your own product according to your requirements and needs. If you are unsure of the configuration, provide us in the notes the necessary information about the existing sensor or product, even a competitor. We will be happy to help you find an alternative Dynisco product. If your request is urgent, let us know. We will do our best to help you resolve this situation to your satisfaction as quickly as possible. If we have all the information, we are able to offer a model with minor differences, which is in stock and you can have another product available the next day.

If you need more information do not hesitate to contact us.

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Thermocouple output:
type J or K
Sensor connection:
1/2"-20 UNF
Temperature range:
0 až 480°C 
  Immersion depth: 2,5 cm
  Compatibility: Compatible with Dynisco pressure sensor mounting holes
  Immersion depth: Optional immersion length (before ordering)




Transducer Mounting Hole Cleaning Tool Kit

Installation of transducers into improperly cleaned or sized holes is one of the major causes of damage to these instruments. With this kit, the .312" tip diameter hole, the 45 degree seating surface, and the .451" hole can be cleaned. The kit includes a gauging plug which is used to verify that the hole has been correctly machined and cleaned. M10 and M18 cleaning kits also available.

Transducer Mounting Hole Machining Tool Kit

The Dynisco Transducer Mounting Hole Machining Tool Kit contains all of the necessary drills and taps to prepare a standard 1/2 - 20 UNF transducer mounting hole and the 45 degree seat. All tools included in this kit are made of premium grade, high strength tool steel. Care should be taken in the use of proper speeds and feeds, lubricants, and a method to assure continual alignment of each progressing tool. M10 and M18 kits are also available.

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.

Certification & Approval

EU Declaration of Conformity

ISO 9001:2015

EAC - The Eurasian Conformity mark