Problems with the drain valve of pressure transmitters used for measuring liquid pressure
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I would like to ask experts: the liquid being measured on-site is toxic and hazardous. According to the regulations, a drain valve should be installed; failing to do so can help reduce leakage points. From the valve at the sampling point all the way to the transmitter, no valves are used in between. Is such an installation acceptable? Are there any relevant regulatory requirements? Thank you!
For hazardous materials, we use isolation fluid; flushing is the primary method. If anything needs to be added, it is done after flushing, and what is added is the isolation fluid.
The measurement of toxic and hazardous media should be carried out using isolation devices, while the rest should be done in the same way as with ordinary transmitters.
If it’s a high vacuum, can it be installed this way?
I heard it seems to be intended for sealed discharge to a specific collection point (handled by the piping specialists behind the discharge valve).