Air Clean Up

  • New Mass Flow Meter Optimized

New Mass Flow Meter Optimized

Apr 08 2009 Read 1147 Times

Fluid Components International (FCI) (USA) has released its new Model ST51 Mass Flow Meter for owners, operators and manufacturers of biogas production and methane capture and recovery systems. These users will find the new Model ST51 provides the high performance and features required of these applications in an explosion-proof instrument that is easy-to-install, safe and requires virtually no-maintenance to deliver a truly best cost solution.

 “This flow meter is designed specifically to solve the unique challenges to flow metering in bioprocess generated methane,” said Randy Brown, FCI’s Marketing Manager. “The ST51 is the optimum biogas flow meter solution at an affordable price. It features a no-moving parts design that’s non-clogging and operates over a wide flow range with low-flow sensitivity. It’s packaged in an explosion-proof transmitter, and the calibration is matched to the user’s actual gas composition and installation conditions.”
            In anaerobic digester produced biogas, gas flow measurement is challenged by the wet, dirty nature of biogas. The biogas produced is a potentially dangerous mixed composition of primarily methane (CH4) and carbon dioxide (CO2), with smaller percentages of hydrogen sulfide (H2S) and other gases. The wetness, H2S and other particulates in the gas create a corrosive condensate that deposits itself on the pipe wall and instruments in the pipe. The gas flow varies widely too—based on fluctuating plant process demands and seasonal variations in temperature and humidity.
            FCI’s innovative new ST51 Flow Meter is designed specifically to measure biogas and all methane composition gases including natural gas. The ST51 features a thermal mass, insertion-style flow element with flow accuracy to ±1% of reading over a broad flow range from 0.3 to 400 SFPS (0.08 to 122 MPS), and repeatability of ±0.5 percent of reading. The flow element is available for use in line sizes from 2 to 24 inches (51 to 610 mm) diameters. It operates over a wide turndown range of 100:1, which is essential due to the variable gas flows in wastewater treatment. It operates at temperatures from 0 to 250°F (-18 to 121°C) and withstands pressures up to 500 psig [34 bar (g)].

The new ST51’s robust thermal mass flow sensing element has no moving parts and no orifices to clog or foul to attain virtually maintenance-free service in wet, dirty biogas applications. It also includes built-in temperature compensation circuitry for accurate, repeatable measurement year-round as temperatures rise and fall seasonally.

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