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Water Oil Interface Level Measurement

The KPS Interface Level Measurements are primarily used to prevent hydrocarbons undercarry with the drain lines. This to prevent any penalties or discussions on environmental issues.

The KPS Interface Level Measurements are also used for efficiency reasons, see also: "what does it cost to make a barrel of slop oil?", or to optimize the performance of the separation processes such as e.g. Slop tanks, and Desalters.

Working principle:

tank tw1With separation processes it is usually difficult to determine where to localize the interface level due to emulsions. The main causes of emulsion layers are e.g. small density differences (of water and hydrocarbon products), the viscosity of fluids and due to pumping/mixing. The unique feature about the KPS Interface level measurements is that they can determine the size and concentration of the emulsion layer present and control the process accordingly. The aqueous products, acids or glycols in oil can be determined with a range of 0-100%.
The principle of the measurement is "energy absorption", electrical waves are being absorbed depending upon the water concentration. Compared to optical devices, this technology allows for the build up of process coatings without having detrimental effects.

Animation on KPS Interface Level Measurements

Brochure KPS Interface Level Measurements

References of Interface Level Measurements:

The KPS Interface level measurements have a large installed base on a global basis. Please find below a couple of closeby references:
The gained application knowledge and know how in the area of water oil interface level measurements, is applied with the delivery of new build water oil interface level measurements.

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Brochure KPS Interface Level Measurements

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Emulsion Concentration: 0-100% Hydrocarbon/ Water by Volume
Process Temperature: Standard: 32°F to 300°F (0°C to 149°C)
High-Temp: 32°F to 450°F (0°C to 232°C)
Ambient Temperature: -40°F to 185°F (-4°C to 85°C)
Pressure Rating: Up to 3000 PSI Materials Of Construction
Probe material: Standard: 316 Stainless Steel, Teflon & Peek
Optional: Duplex, Hastalloy, Monel (Others available upon request)
Seals: Standard: Aflas and Teflon
Optional: Viton
Process Connection SH-2”/SS: 2” NPT Seal Housing, 316 Stainless Steel
SH-2”/CS: 2” NPT Seal Housing, Carbon Steel
CF-3/4”/SS: 3/4” NPT Compression Fitting, 316 Stainless Steel
CF-3/4”/CS: 3/4” NPT Compression Fitting, Carbon Steel
Flanged Connections: ANSI 150# to 1500#
Wiring Connections: Probe Terminal Block #18 AWG Maximum Diameter
Power Requirements: 12VDC to 30VDC
Current: 3.9mA to 21mA
4 - 20mA Loop Powered HART
ID-201: 1/2” shaft Standard: 48” (4 Ft.) Minimum: 12” (1 Ft.) Maximum: 120” (10 Ft.)
ID-202: For probe lengths greater than 10 feet, sturdier 1-1/4” shaft assemblies from 5 foot sections via threaded connections.
Certification: Intrinsically Safe: Class 1, Div.1, Groups C & D
ATEX: II 1G Ex ia IIC T5 Ga (-40ºC<Ta<+65ºC)

CSA-US Canadian Standards Association/UL Specifications (pending)
ATEX European Committee for Electrical Standardization
GOST-R Russian Approval for Hazardous Areas and Accuracy
JRIIS Japanese Research Institute of Industrial Safety

The KPS automated sampling systems installed at AWG and K14 have been running for several years now and after the initial start-up without a need for maintenance.

Head Metering Services of Shell Upstream International


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