7 replies to this topic

[Lyne]

Hello, please does a radar level instrument installed on a storage tank require an isolation valve ?

Edited by Lyne, 24 August 2025 - 02:57 PM.

[Pilesar]

I have seen many storage tanks open to the atmosphere without any isolation valves! Isolation valves might be required if the contents need to be isolated.

[breizh]

Hi.

No isolation valve. Check documentation from Vega or other vendors .

Breizh

Attached Files

•  Vega level.pdf   1.55MB   25 downloads

[Lyne]

Many thanks for your answers

[Lyne]

I have seen many storage tanks open to the atmosphere without any isolation valves! Isolation valves might be required if the contents need to be isolated.

But if it’s a pressure transmitter it’s equipped with an isolation valve!

[breizh]

If your tank is breathing to atmosphere, there is no need for isolation valve.

Radar technology is reliable; isolation valve may be required for technology subject to maintenance. 

I've been using intensively this technology in chemical plants, on storage tanks reactors, buffer tanks, I don't remember Isolation valve installed.

Other reference E&H attached

Good luck.

Breizh

Attached Files

•  Endress.pdf   6.24MB   4 downloads

[Pilesar]

Can the level device be maintained safely while the storage tank is in service? If the storage tank contains lethal or highly hazardous substance, then I advise a block valve. Could you defend not having a block valve if the question were asked during a HAZOP study?

[Lyne]

Can the level device be maintained safely while the storage tank is in service? If the storage tank contains lethal or highly hazardous substance, then I advise a block valve. Could you defend not having a block valve if the question were asked during a HAZOP study?

It’s an oil storage tank open to atmosphere,


thank you everyone