Regarding venturi tubes with differential pressure transmitters
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I need help from experts: Can a venturi tube be connected to two differential pressure transmitters, with one signal going to the DCS and the other to the SIS? If possible, it would be best to have specific images or a clear description; thank you all.
Sure. When placing an order, you can request that 2 pairs of pressure tapping holes be drilled.
May I ask, are things like orifice plates and average velocity tubes all the same?
It’s the same; it’s possible to request custom double pressure tapping holes
Sure, the signal goes into the signal distributor, with one input and two outputs. One goes to DCS and one goes to SIS. If high safety requirements are in place, it is best to handle things separately: one instrument per system. SIS is primarily used for interlock protection, while DCS is mainly used for monitoring and control.
The safety requirements are high; handling it separately could be the approach I mentioned: one venturi tube, two pairs of holes, connected to two transmitters?
The Venturi has two pressure tapping holes at different heights, which are sent to two transmitters via a tee~~
I don’t quite understand it – if there’s only one throttle device as a single component, what’s the purpose of using two transmitters? It’s better to use the previous transmitter and then split it into two with an isolator.