VEGA

Gas production

Gas production

Pressure and flow measurement

To ensure reliable control of the entire system, the pressure in the pipelines must be accurately measured. Depending on the pipeline network, the gas pressure can be between 26 and 60 mbar. Due to the small measuring range, the pressure transmitter must deliver very precise, repeatable results. The gas quantity produced is precisely determined to ensure correct and accurate invoicing to the gas customer. Pressure transmitters used on gas mains as well as level sensors used on gasometers are subject to legal regulations concerning hazardous substances – the deployed sensors must therefore have all the necessary approvals.

Gas pressure measurement with VEGABAR 52

VEGABAR 52 with ceramic CERTEC® measuring cell delivers high-quality measuring results even when applied to very small measuring ranges. The ceramic measuring cell is hysteresis-free and has long-term stability. The instrument delivers an intrinsically safe output signal and fulfils the requirements of ATEX EEx ia IIC T6.

Gas volume measurement with VEGADIF 65

The gas extracted from the digestion tower is measured with a metering orifice and a differential pressure transmitter. The differential pressure that arises at the orifice plate is proportionate to the flow volume. VEGADIF 65, with its small, adjustable measuring range, detects the slight pressure difference reliably and accurately.

» VEGABAR 52

Measuring cell
CERTEC
Measuring range
-1 … +60 bar (-100 … +6000 kPa)
Process fitting
thread from G½, ½ NPT
flanges from DN 25, 1½"
hygienic fittings
Process temperature
-40 … +150 °C
Deviation in characteristics
0.2 %; 0.1 %; 0.075 %
SIL qualification
optionally up to SIL2

» VEGADIF 65

Measuring cell
metallic
Measuring range
from -10 … +10 mbar (-1 … +1 kPa)
to -40 … +40 bar (-4000 … +4000 kPa)
Process fitting
¼-18 NPT, RC ¼ 
Process temperature
-40 … +120 °C
with chemical seal assembly -40 … +400 °C
Deviation in characteristics
0.15 %; 0.075 %