Feedwater is a critical component of the circulatory processes in a power station as production of electrical power comes to a halt if insufficient is available. That is why measurement instrumentation is crucial to maintain the required levels of water in the feedwater tank, in case a fault results in loss of electrical power a gauge glass is usually integrated.
Level measurement in the feedwater tank with Vegaflex 66
Vega manufactures a guided microwave level measuring sensor that is unaffected by condensate as well as high process temperatures and pressures. The Vegaflex 66 guarantees high measuring certainty and reliability in the bypass and is able to operate in conditions from -200 to 400°C and 400 bar pressure.
As a part of the safety instrumented system (SIS), it can also be redundantly interconnected with the vibrating level switch, Vegaswing 61 up to SIL3. Safety-related implementation allows both overfill and dry run protection.
Redundant dry run protection with Vegaswing 61
To provide absolutely reliable monitoring of the minimum level in the tank, often two, or even three, Vegaswing 61 vibrating level switches are installed. As a single device it can be used as dry run protection in safety-related systems up to SIL2 and in case of redundant use, up to SIL3.
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