Flare gas flowmeter

The GF90 flare gas flowmeter from Fluid Components International is designed to solve the problem of measuring dangerous, explosive and toxic gases that often flow at extremely varying or low levels. It can measure waste gases of varying hydrocarbon composition down to a low 0.25 sfps for flare system disposal.

The GF90 features a thermal mass gas flow sensing element designed with 316 stainless steel and nickel-braze construction. It can also be specified with corrosion- and abrasion-resistant alloys, including Hastelloy, Monel and tantalum, and with all-welded construction for service in harsh environments. The operating temperature range is from -73 to 454 °C and pressures up to 69 bar (g).

The transmitter can store up to three calibration groups. Each group can be independently configured for a specific calibration range, fluid, switch point settings, etc. The instrument also provides both flow and temperature measurements without any additional tap points.

The GF90 features turndowns from 1000:1, accuracy of ±1% of reading plus 0.5% of scale, with repeatability of ±0.5% of reading or better. Flow sensitivity is from 0.08 to 487.7 nmps (m/s at a normal temperature of 21.1 °C and pressure of 1.013 bar absolute).

The GF90’s transmitter features two independent, field-programmable analog signal outputs of 4-20 mA, 0-10 VDC, 0-5 VDC, and/or 1-5 VDC, which can be assigned to any combination of flow or temperature. Field-programmable, dual-alarm switch points with relay outputs are available (high, low or windowed alarms) and can also be assigned to flow or temperature readings. Dual 10 A relay outputs are also provided.