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The GF90 flare-gas flowmeter from Fluid Components International (FCI) solves the problem of measuring dangerous, explosive and toxic gases that often flow at varying and/or low levels.

This is said to provide a reliable, cost-effective solution for offshore production platform operators and oil/gas process engineers measuring the flow of combustible hydrocarbon waste gases in flare-gas system operations.

The company will exhibit the GF90 flowmeter in Booth 7,705 at the Offshore Technology Conference on 3-6 May in Houston, Texas.

Hydrocarbon combustible waste gases are challenging to measure because of their wide flow fluctuations caused by variable production and refining processes.

With its highly sensitive thermal mass flow sensing element, the GF90 flowmeter also precisely measures gases of varying hydrocarbon composition.

This makes it suitable for ultimately eliminating these dangerous, polluting gases.

With a highly sensitive thermal mass flow sensing element and microprocessor-based intelligence featuring multiple calibration groups built into the design, the advanced GF90 flare-gas flowmeter delivers precision flow measurement to a low 0.25 SFPS.

A flowmeter that accurately measures combustible hydrocarbon waste gases for flare system disposal ensures that these dangerous byproducts are safely and efficiently eliminated from the environment with minimal pollution.

The GF90 features a thermal mass gas flow sensing element designed with 316 stainless-steel and nickel-braze construction.

It also can be specified with corrosion- and abrasion-resistant alloys, including Hastelloy, Monel and tantalum, and with all-welded construction for service in harsh environments.

It is available for service in a range of applications, operating at temperatures from -100F to +850F (-73C to +454C) and at pressures to 1,000psig [69bar(g)].

Designed for complex multi-gas or variable-flow processes, the GF90 flowmeter includes an advanced microprocessor-based programmable transmitter.

The transmitter can store up to three calibration groups.

To obtain accurate flow measurement in complicated gas processes, each group can be independently configured for a specific calibration range, fluid and switch-point setting, for example.

The instrument is also inherently multi-variable, providing both flow and temperature measurements without any additional tap points.

Developed with constant-power technology, the GF90 features turndowns from 1,000:1 and an accuracy of +1 per cent of the reading plus 0.5 per cent of the scale, with a repeatability of +0.5 per cent of the reading or better.

Flow sensitivity is from 0.25 to 1,600 SFPS [ft/sec at a standard temperature of +70F and a pressure of 14.7psig] or 0.08 to 487.7 NMPS [m/sec at a normal temperature of +21.1C and a pressure of 1.013bar absolute].

The GF90 transmitter features two independent, field-programmable analogue signal outputs of 4-20mA, 0-10VDC, 0-5VDC and/or 1-5VDC, which can be assigned to any combination of flow and/or temperature.

It also offers dual-alarm switch points with relay outputs.

The switch points are user and field programmable to alarm at high, low or windowed and can also be assigned to flow and/or temperature readings.

Dual 10A relay outputs are provided for contact closures to lamps, alarms and control systems.

A NEMA Type 4X (IP66)-rated transmitter enclosure is standard.

Optional Class I and II, Division 1 and 2 and Groups B, C, D, E, F and G [EEx d IIC] transmitter enclosures are also available with agency approvals for Factory Mutual Research, ATEX, CSA, GOST/RTN, IEC, CPA and NEPSI.

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