Data Search by General Subjects
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
Purpose of Minimum Flow by Randal Ferman, EKWESTREL - Hot Topic Hour September 11, 2014
Randal Ferman of EKWESTREL discussed the purpose of identifying “minimum flow:” 1) The lowest continuous flow the pump is permitted to operate, 2) Without reference to a specific vibration limit or other criteria, 3) The ‘default’ pump manufacturer’s recommendation. The main purposes of minimum flow are to establish permissible vibration and impeller cavitation erosion life.
Revision Date: 9/11/2014
Tags: 221112 - Fossil Fuel 化石燃料, 221112 - Fossil Fuel 化石燃料, Ekwestrel, Pump, Noise, Vibration
This case study describes a sky vent solution for a heat recovery steam generator (HRSG) which addresses noise and vibration concerns at a combined cycle power plant in Texas. The solution incorporated a whisper Trim III noise attenuating flow cage along with a downstream diffuser.
Revision Date: 9/8/2014
Tags: 221112 - Fossil Fuel 化石燃料, Emerson Process Management, Sargent & Lundy, Heat Recovery Steam Generator, Control Valve, Valve, Noise, Vibration, USA
Moran Iron Works Company Profile in the Combined Cycle Journal, October 1, 2013
Moran Iron Works, Inc. is a global fabrication company. We commit to your objectives by providing efficient processes, flexibility, and adaptability ensuring that your project is delivered on time. We specialize in one-of-a-kind fabrication and replacement of existing turbine components.
Revision Date: 10/22/2013
Tags: 221112 - Fossil Fuel 化石燃料, Moran Iron Works, Exhaust Ductwork, Silencer, Air Inlet House, Noise, Air Intake, Exhaust Handling, Combined Cycle Journal
DRB Company Profile in the Combined Cycle Journal, October 1, 2013
DRB Industries is a leading supplier of Gas Turbine Inlet Air Filtration, & Cooling Products along with Turnkey Installation. DRB also supplies Cooling Tower Parts & Retrofits, Evaporative Cooling Media and provides Audits and Inspections for plants.
Revision Date: 10/22/2013
Tags: 221112 - Fossil Fuel 化石燃料, DRB Industries, Fogging System, Silencer, Air Inlet House, Cooling Tower, Air Filter, Parts Supplier, Noise, Cooling, Air Intake, Air Filtration, Combined Cycle Journal
Camfil Farr Power Systems Company Profile in the Combined Cycle Journal, October 1, 2013
Camfil Farr Power Systems is one of the world’s leading actors in developing, manufacturing and supplying clean air and noise reducing systems for gas turbines.
Revision Date: 10/22/2013
Tags: 221112 - Fossil Fuel 化石燃料, Camfil Farr, Air Inlet House, Silencer, Exhaust Ductwork, Air Filter, Service & Repair, Parts Supplier, Noise, Air Intake, Air Filtration, Exhaust Handling, Combined Cycle Journal
Braden Manufacturing Company Profile in the Combined Cycle Journal, October 1, 2013
Braden designs and manufacturers air filtration systems and filters, inlet cooling/heating, silencing, exhaust & inlet ductwork, diverter dampers, simple cycle SCRs, expansion joints, bypass stacks, and diffusers & plenums. Braden also provides installation services via Williams Industrial Services, as well as inspection and reporting services.
Revision Date: 10/22/2013
Tags: 221112 - Fossil Fuel 化石燃料, Braden Manufacturing, Exhaust Ductwork, Air Filter, Expansion Joint, Noise, Air Filtration, Air Intake, Exhaust Handling, Combined Cycle Journal
AAF International Company Profile in the Combined Cycle Journal, October 1, 2013
For over 90 years, AAF has been a leader in the field of air filtration, through the most demanding conditions and the toughest environmental challenges. The filtration, noise abatement and other turbine products we make are effective, durable and crucial to greater efficiency and performance in a wide range of industries.
Revision Date: 10/22/2013
Tags: 221112 - Fossil Fuel 化石燃料, AAF International, Air Filter, Noise, Air Filtration, Air Intake, Combined Cycle Journal
Severe Service Control Valves by Ory Selzer, CCI - Hot Topic Hour June 2, 2011
Ory Selzer, Valve Doctor - Power, Americas at CCI -Control Components, Inc, described the important requirements of severe service control valves, as they apply to steam and water.
Revision Date: 6/2/2011
Tags: 221112 - Fossil Fuel 化石燃料, 221112 - Fossil Fuel 化石燃料, CCI, Ball Valve, Valve, Erosion, Cavitation, Corrosion, Noise, Vibration, Flow Control
Donald Johnson of CRANE ChemPharma Flow Solutions & CRANE Energy Flow Solutions stated that pressure locking and thermal binding solutions are important for wedge gate and parallel slide gate valves.
Revision Date: 6/2/2011
Tags: 221112 - Fossil Fuel 化石燃料, 221112 - Fossil Fuel 化石燃料, Crane Energy Flow Solutions, Valve, Corrosion, Erosion, Vibration, Noise, Cavitation, Flow Control
Severe Service Control Valves by Ory Selzer, CCI Valve - Hot Topic Hour June 2, 2011
Ory Selzer, Valve Doctor - Power, Americas at CCI -Control Components, Inc, described the important requirements of severe service control valves as they apply to steam and water.
Revision Date: 6/2/2011
Tags: 221112 - Fossil Fuel 化石燃料, 221112 - Fossil Fuel 化石燃料, CCI, Valve, Corrosion, Erosion, Vibration, Noise, Cavitation, Flow Control
Donald Bowers, Vice-President, Sales & Marketing at Weir Valves & Controls, discussed the challenges of Center Cavity over Pressurization (CCOP) that can cause Pressure Locking (PL) and Thermal Binding.
Revision Date: 6/2/2011
Tags: 221112 - Fossil Fuel 化石燃料, 221112 - Fossil Fuel 化石燃料, Weir Valves & Controls, Valve, Corrosion, Erosion, Vibration, Noise, Cavitation, Flow Control
Valves for Power Plant Steam and Water Applications Webinar - Hot Topic Hour June 2, 2011
The speakers addressed issues for the various valve applications in power plant steam and water systems. Password: hth484
Revision Date: 6/2/2011
Tags: 221112 - Fossil Fuel 化石燃料, 221112 - Fossil Fuel 化石燃料, Crane Energy Flow Solutions, CCI, Weir Valves & Controls, Valve, Corrosion, Erosion, Vibration, Noise, Cavitation, Flow Control