Product category:
Coriolis mass flowmeters
News Release from: Krohne | Subject: F2 Chemicals
Edited by the Processingtalk Editorial
Team on 25 October 2007
Optimass improves liquefied gas
measurement
Specialist chemical manufacturer F2 Chemicals has installed the Krohne Optimass 8000 Coriolis mass flowmeter to improve the reliability of liquefied gas flow measurement at its plant in Lancashire
F2 Chemicals previously used a variable area flowmeter, to measure the flow of liquefied perfluorobutane and acetone However the float within the device was believed to introduce turbulence into the gas flow
This article was originally published on Processingtalk on 30 Jan 2003 at 8.00am (UK)
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This caused water in the liquefied gas to solidify into ice around the float, eventually causing it to stick, and causing the device to fail.
The liquefied gas is distilled into several fractions which are used as active ingredients in pharmaceutical products.
It was essential that F2 Chemicals found a way to measure the flow of the liquid reliably to ensure the consistent, high quality of its products.
F2 Chemicals installed the Krohne Optimass 8000 Coriolis mass flowmeter because of its ability to measure liquefied gas reliably and accurately at low temperatures.
Its twin "U" shaped measuring tubes provide excellent signal-to-noise ratio and measurement turndown.
This is important considering the low pressures of the gas being measured.
Measurement reliability was as a result significantly improved.
Perfluorobutane and acetone are contained in 100 litre industrial cylinders and are charged into the distillation column and refluxed through the Optimass Coriolis mass flowmeter at flow rates of between 40 and 200kg/hour and at pressures of between 2 and 7bar.
The temperature of the liquefied gas varies between -5C and +15C.
A 20mA signal is taken from the Optimass and fed into a DCS.
The reading is manually monitored and the distillation process adjusted according to temperature.
"Measurement reliability is critical to us but the measurement technology we were using did not provide this", said Peter English, operations manager at F2 Chemicals.
"Since we installed the Krohne Optimass Coriolis mass flowmeter it has improved significantly".
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