What matters when using a Roots flow meter for fuel gas metering?
For Roots gas meters: Ex certification, upstream filter with draining, T&P compensation (else billing drift), away from turbulence, bypass line.
Key points for Roots gas meters on fuel gas/biogas:
1) Certification: choose explosion-proof models (Ex d II BT4 or better); 2) Filtration: gas carries dust and rust — install an upstream filter with regular draining; 3) Temperature & pressure compensation: gas volume depends strongly on conditions — use a compensated model, otherwise custody transfer will drift; 4) Placement: keep away from pressure-regulating valves and strong turbulence; 5) Bypass: provide a bypass line for calibration and maintenance.
Selection & Installation
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