FCI’s ST100/ MT100 Series flow meters for thermal oxidisers

AMS Instrumentation and Calibration presents FCI’s ST100 Series thermal
flow meters featuring single- or dual-point thermal dispersion technology for
use with thermal oxidiser systems.

Combining precision flow sensors with feature- and function-rich
electronics, these flow meters offer a fast response and excellent
repeatability, and require virtually no maintenance based on their rugged
no-moving parts design. Their digital display and transmitter meet both current
and future needs for outputs, process information and communications with a
choice of traditional analogue or digital bus communications.

FCI’s MT100 thermal flow meters are insertion-type, multipoint
instruments designed for complex thermal oxidiser systems such as those with
larger diameter pipes, flues, or rectangular ducts. These applications are
difficult for ordinary flow meters because of distorted flow profiles and lack
of straight-run, which can lead to inaccurate and non-repeatable flow
measurement. The MT100 meter places up to eight flow sensing points in the flow
stream and averages them, resulting in highly accurate and repeatable flow rate
measurement.

Many processes in the petroleum refining, chemical/solvents,
paint/coatings and photoelectric industries generate HAPs and VOCs, contributing
to greenhouse gases and the global warming phenomenon. Thermal oxidisers remove
these gases from production process waste, flue and tail emissions before their
release into the environment to meet federal, state and local clean air
regulations.

The thermal oxidation process is used to destroy HAPs and VOCs,
converting them into carbon dioxide (C02) and water vapour. While there are
multiple manufacturers, designs and types of thermal oxidiser systems, they all
depend on accurate air/gas flow measurement as these waste gases enter and exit
the system.

Accurate air/gas flow measurement and flow rate control are critical for
preventing excessive VOC loading. Interruption in the exhaust and recirculation
systems can also lead to a hazardous unsafe condition that potentially requires
shutting down the production process. Depending upon the type of oxidiser and
site requirements, typical air flow rates can range from 100 to 500,000 SCFM.

In thermal oxidiser applications, FCI’s Model ST100 with VIP flow
conditioner provides mass flow measurement over a wide flow range of solvent
laden air, combustion air, natural gas feed and exhaust air. Accuracy is ±0.75%
reading, ± 0.5% full scale with a 1-second response time. There is no
significant pressure drop and the meter is easy to install in crowded locations
with an optional hot tap version.

The ST100 meters are available in 316L SS or Hastelloy C 276 (NACE
MR0175/ISO 15156). To support variable demand, the meter features a wide
turndown ratio of 100:1, with optional 1000:1. They measure very low flows from
0.08 Nm/sec up to a high of 300 Nm/sec. For safety and reliability they meet
IEC 61508 compliance requirements demonstrated through independent third party
FMEDA (exida): SIL 1, HFT = 0.

For multipoint flow, the Models ST102 and MT100 offer dual-sensing or
multi-point sensing, respectively, for larger line sizes. There is no
significant pressure drop and they’re relatively easy to install with an
optional hot-tap configuration. They’re available in 316L SS or Hastelloy C 276
(NACE MR0175/ISO 15156).

The ST102 is accurate to ±075% reading, ± 0.5% full scale with a 1-second
response time; while the MT100 meter offers flow accuracy (at calibrated
conditions) of ±1.75% of reading, ±0.5% of full scale. Both meters feature a
wide turndown ratio of 100:1, optional 1000:1. They also measure very low flows
from 0.08 Nm/sec up to a high of 300 Nm/sec.

For further information, please visit the AMS Instrumentation and
Calibration website www.ams-ic.com.au or
call 03-9017 8225, or Freecall (NZ) 0800 442 743.

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