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Eliminating Feedwater Control Valve Damage with Multi-stage, Multi-path Flowserve Control Valves
The feedwater control valve (located downstream of the high-pressure feedwater heaters) performs the critical function of controlling the feedwater flow rate over a wide range of service conditions. During startup and shutdown, the feedwater control valve restricts flow by controlling near the closed position. The pressure drop across the valve is high, which can cause severe cavitation and noise. Over time, these severe service conditions will damage a control valve. Even a properly designed valve will not work well unless it is connected to a correctly sized actuator. An undersized actuator will cause unstable flow conditions while an oversized unit has a slow response to input signals. Flowserve has successfully addressed these issues with specially engineering multi-stage multi-path, or MSMP, designs. MSMP trim channels the flow through a series of orifices to reduce the pressure in stages. This prevents cavitation from occurring inside the valve. The velocity of the feedwater is kept low to prevent erosion of the valve body and to reduce noise and vibration. MSMP trim is customer-designed for the full range of service conditions. MSMP trim prevents cavitation when throttling near the seat but acts like a conventional control valve when controlling near the full-open position. As the pressure drop across the valve decreases, the cavitation also decreases and then stops. To maintain flow rate with decreasing pressure drop, the valve will open further and expose flow paths without orifices. The orifices are not needed at this flow condition because cavitation has stopped.
Revision Date: 8/3/2015
Tags: 221118 - Other Electric Power , 221118 - Other Electric Power , Flowserve, Valve, Actuator, Boiler Feedwater System, High Performance Valve, Cavitation, Noise, Vibration
Flowserve Offers Full Range of Control Valves for Power Plant Applications
Flowserve offers a full range of control valves for conventional, as well as combined cycle, power plants.
Revision Date: 4/22/2015
Tags: 221112 - Fossil Fuel 化石燃料, 221112 - Fossil Fuel 化石燃料, Flowserve, Valve, Flow Control
Power-Gen Europe 2013: Valve Exhibitors
POWER-GEN International is the industry leader in providing comprehensive coverage of trends, technologies and issues facing the generation sector. As the need to operate more efficiently and cost-effectively becomes increasingly important, no other event bridges challenges with solutions like POWER-GEN International. More than 1,200 companies from all sectors of the industry exhibit each year and more than 19,000 attendees come together at POWER-GEN International for a horizontal look at the industry with key emphasis on new solutions and innovations for the future.
Revision Date: 7/8/2013
Tags: Young & Franklin, Vanatome, EGE Industrial Controls, Flowserve, Welland & Tuxhorn, Verdelet ATN, Drehmo, VAG Armaturen, Copes-Vulcan, Sipos Aktortik, Lazaro Ituarte Internacional, Hora, AUMA Riester, Salvi, Leslie Controls, Austria
The application of boiler feed pumps in combined cycle, thermo-solar and biomass-fired power plants
Revision Date: 8/30/2012
Tags: 221112 - Fossil Fuel 化石燃料, Flowserve, Pump, Multi-stage Centrifugal Pump, Centrifugal Pump, Boiler Feedwater
Revision Date: 8/30/2012
Tags: 221112 - Fossil Fuel 化石燃料, Flowserve, McIlvaine