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News Releases |
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Bently Nevada Completes 3500 Series Turbine Supervisory Instrumentation with Release of Valve Position Monitoring Functions | |
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For more information: Jeff Rudd Applications Engineer Bently Nevada Corporation 1617 Water Street Minden, NV 89423 Phone: (775) 782-3611 Fax: (775) 782-9253 E-mail: jeff.rudd@bently.com |
MINDEN, NEVADA, 9 April 1999 - With the addition of valve position monitoring, Bently Nevada's 3500 Series Machinery Protection System now offers a complete solution for Turbine Supervisory Instrumentation (TSI) on medium and large steam turbines in power generation service. The degree to which a turbine's steam inlet valves are open (termed valve position) is a critical parameter used during unit startup and rundown, and is related to load once the unit is at operating speed. When correlated with other measurements (such as load, temperature, pressure, or vibration), valve position can be useful in determining overall turbine efficiency and in expediting the machine problem diagnosis process. Equipped with the 3500's interface to machinery management software, the valve position measurements on a machine can be seamlessly integrated with other TSI measurements for a more complete picture of the entire machine train. The valve position monitor accepts inputs from an AC linear variable displacement transducer (AC LVDT) to measure the position of the valve stem relative to its full stroke, or from a rotary potentiometer to measure the position of a valve cam shaft relative to its full rotation. Other transducer input types are planned for the future as well. Valve position is just one of the user configurable monitoring functions of the 4-channel 3500/45 position monitor. The monitor's flexibility in providing other TSI measurements results in reduced spare parts requirements for users. |
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