Level Gauge Slection criterion
Level Gauge Slection criterion
(OP)
In a separator vacum,for oil/water interface measurement it is suitable LG type reflex or transparent and the number of connextion minimum two or three connection required for this case.
Best regards
Best regards





RE: Level Gauge Slection criterion
You cannot use reflex type LG for liquid/liquid interface (also ref API 551 3.3.3.1). As the reflex type is based on reflection of the actual level, you cannot spot the actual interface bewteen oil/water (if required). So you should select the transparent type.
Regarding number of connections (several sections?) is all depending on your service.
Bonetti (www.bont.it) provides some excellent LG's.
RE: Level Gauge Slection criterion
Thank you for your response,I will choose transparent type as per your recommendation, but the number of connection it is required only tow for oil/water interface measurement in the outlet of a separtor vessel?
ragards
RE: Level Gauge Slection criterion
RE: Level Gauge Slection criterion
For oil/water interface, magnetic level gauges will only give you the level of the combined volume, so you cannot spot the actual interface between oil/water.
For installation, various companies have various standards. TOTAL for instance has a maximum distance C-C on 2000mm. If longer range is needed, then several gauges are used, with an overlap on at least 50mm (visible). However, if the application is rather "nice", it can for sure be a longer gauge - but you might run into problems when aligning the upper/lower nozzle. Additional support might also be necessary.
RE: Level Gauge Slection criterion
Thank you for your comment,
I tray to used tow LG between the vessel nozzele,
regards
RE: Level Gauge Slection criterion
I think for measuring interface, it will be better to use capacitive level transmitter or radar type
RE: Level Gauge Slection criterion
Radar will only see the liquid/gas interface, not a liquid/liquid interface.
A very carefully weighted float that floats on the lower liquid but sinks in the lighter liquid, driving a mechanical sensor, might be the most reliable way to deal with this.
RE: Level Gauge Slection criterion
http://www.agarcorp.com/detectors.html
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