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In addition high liquid level in the vessel may lead to carryover of liquid into the gas outlet may damage downstream equipment such as gas compressors. High liquid level in a flare drum can lead to undesirable carryover of liquid to the flare. [8] A high-high liquid level (LSHH) in the flare drum initiates a plant shutdown.
Liquid level floats, also known as float balls, are spherical, cylindrical, oblong or similarly shaped objects, made from either rigid or flexible material, that are buoyant in water and other liquids. They are non-electrical hardware frequently used as visual sight-indicators for surface demarcation and level measurement. They may also be ...
Depending upon how much liquid flow is expected, the liquid outlet line should probably have a liquid level control valve. As for the mechanical design of the drum (materials of construction, wall thickness, corrosion allowance, etc.) use the same criteria as for any pressure vessel.
A float switch is a type of level sensor, a device used to detect the level of liquid within a tank. The switch may be used to control a pump, as an indicator, an alarm, or to control other devices. One type of float switch uses a mercury switch inside a hinged float.
An air bubbler level sensor uses a tube with an opening below the surface of the liquid level. A fixed flow of air is passed through the tube. A fixed flow of air is passed through the tube. Pressure in the tube is proportional to the depth (and density) of the liquid over the outlet of the tube.
A staff gauge or head gauge is calibrated scale which is used to provide a visual indication of liquid level.When installed perpendicular to an inclined or sloped surface, a staff gauge is usually calibrated so that the indicated level is the true vertical level.