[+] How much is a burst disc?
There is only one answer to this question: Just ask us specifically for burst disks for your application and we will prepare a detailed short-term and comprehensive offer. Especially in the field of metal burst disks the price is highly dependent on the material
used, the number of burst discs, the burst tolerance
, and not least the type of burst disk (flat, vacuum-proof tensile load, reverse acting, …). Whether specific project or just budget plan – only with a concrete offer, you get a reliable statement.
[+] Operational temperature or burst temperature?
The burst temperature of a rupture disc must be the operating temperature of a system is not always the same. This may for example due to the fact that between his process in the plant and the work site of the rupture disc is a certain distance, and therefore reaches a high temperature does not reach the rupture disk. Or the pressure increase in a facility, which subsequently leads to the burst of the disc is performed by a temperature increase by as a chemical reaction, etc..
Therefore it is important to know the design of a burst disk, temperature at which the rupture disk is present at this, as the temperature, especially for metal burst discs. At higher temperature (as design temperature of the burst disk) the burst disc responds at a lower pressure, and at a lower temperature vice versa accordingly.
[+] How do I define the maximum working pressure?
The maximum working pressure is the pressure at which the burst disk used reaches the longest service life. It is calculated as the minimum burst pressure of the rupture disk multiplied by the employment relationship. If the maximum working pressure is exceeded frequently or permanently, the rupture disc undergoes an undefined pre-damage, which leads to premature rupture or bursting below the minimum burst pressure. Proper design and selection of the rupture disc to be used is therefore of enormous importance.
[+] Working relation – how do I calculate it?
The working relation is expressed as a percentage and is calculated from the ratio of the minimum burst pressure to the working pressure. Depending on the burst disc type, it normally ranges between 50% and 90%, also see DIN EN ISO 4126-6.
[+] Discharge cross-section – what is it and what does it depend on?
The discharge cross section (AQA) is the free cross-sectional area
(e.g. in a burst disc device) for the disposal of the medium. The required AQS is calculated depending on the type of the medium, pressure, temperature, and density for each application. It is important to know the type of flow (gaseous, liquid, two-phase) and the mass flow
to be dissipated in kg/h. The nominal width used is calculated from it.