| FST’s Aquarian products can no longer be purchased through Yarway™. For almost two decades FST designed and manufactured the Aquarian for Yarway™ Corporation to exclusively marketing and distribute. The Aquarian product line is now sold directly by Fossil Steam Technologies and through certified agents. Engineered Process Controls the Aquarian Agent for the Pacific Northwest and its owners have over 20 years of experience selling Yarway™ products.
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| Typical Applications for Aquarian Products:
• Main-steam, Hot and Cold reheat drains
• Turbine casing and extraction drains
• Turbine water induction prevention
• Main boiler high/low alarms and trips
• Hot well alarms
• Deaerator storage level alarms
• HP and LP Feedwater heater column level alarms and trips
• Generator coolant liquid level
• Blow-down flash tank alarm
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Aquarian Overview
Fossil Steam Technologies Inc. (FST) Aquarian Water Detection Products and Systems continue to set the standard whereby all others are judged for accurate and reliable measurement of Boiler Drum Water Level, Feedwater Heater Level and Alarming, Drain-Pot Level and Alarming, and other applications pertaining to water detection. They are an economical and reliable alternative to float level switches.
FST’s Aquarian products can no longer be purchased through Yarway™. For almost two decades, Yarway™ Corporation of Blue Bell, PA. had been granted exclusive worldwide marketing and distribution rights for the FST designed and manufactured Aquarian drum level product line. Due to changing business conditions and ownership of Yarway™, the Aquarian product line is now sold directly by Fossil Steam Technologies and through certified agents only.
The Water Detection Probe and associated verification technique employed in the Aquarian water level detection system operate via the following principles:
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Verification of the presence of water is based on measuring the difference in resistance between high purity water and steam. They form a resistivity cell, which is then compared with a known reference resistor to form a resistor divider network. A distinction is made between steam and water by the Detection and Verification (D&V) unit. The D&V unit measures the returning signal from the probe enabling it to differentiate between "water" and "steam" and output the appropriate indication. Each probe has a dedicated D&V electronic circuit, ensuring that a probe circuit failure is limited to the offending probe, eliminating any affect on the overall operation of the Aquarian.
Electroplating of the probe is prevented by using a symmetrical source current wave.
System diagnostics perform an ongoing continuity check of the wire to the probe. Optionally, two wires per probe may be used to ensure the integrity of the connection of the probes to the D&V.
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