Selection issues of pressure gauges after rupture disc failure
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For a pressure transmitter behind a rupture disc, since the pressure to be measured is quite low (a few thousand pascals to a dozen thousand pascals), but the pressure after the rupture disc breaks is very high (several megapascals), what type of pressure transmitter should be used to ensure accurate pressure measurement while also preventing damage when the rupture disc fails? Is it true that only differential pressure transmitters can be used? Has anyone used a pressure transmitter for such operating conditions?
In such cases, it is possible to consider using pressure transmitters with overpressure protection; such devices can accurately measure pressure within the normal range, and the overpressure protection feature prevents the device from being damaged when the pressure exceeds that range. If overpressure concerns are extremely severe, considering the use of a differential pressure transmitter is an option; by setting an appropriate range, it can ensure that the instrument remains protected from damage even when the burst disc fails. It is recommended to consult the specific pressure transmitter manufacturer to select the most suitable product model and configuration based on the actual operating conditions and requirements. .
It should be consistent with the specifications of the pressure transmitter in front of the burst disc. The pressure transducer at the back is used to detect pressure changes after an explosion; it mainly measures the pressure after the rupture of the blast disc, and under normal conditions this is a slightly positive pressure
Choose a transmitter that can withstand high pressures after an explosion, one that is capable of measuring values in the range of a few thousand pascals before the explosion; accuracy of the measurements taken before the explosion does not need to be very high.
Considering the on/off signals of rupture discs, switch-type signals such as those from pressure switches can be selected
Why is it necessary to measure the pressure before blasting? . . What’s the point of not using blasting to measure it? Generally, a pressure switch is sufficient for triggering an alarm