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About Us
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Products
- Butterfly Valve
- Triple Offset Butterfly Valve
- Double Eccentric Butterfly Valve
- Resilient Seated Butterfly Valve
- High Performance Butterfly Valve
- Flue Gas Butterfly Valve
- Ball Valve
- Small Size Ball Valve
- Floating Ball Valve
- Trunnion Ball Valve
- Full Welded Ball Valve
- Gate Valve
- Forged Gate Valve
- Casting Steel Gate Valve
- Casting Iron Gate Valve
- Knife Gate Valve
- Globe Valve
- Forged Globe Valve
- Casting Steel Globe Valve
- Casting Iron Globe Valve
- Check Valve
- Forged Check Valve
- Lift Check Valve
- Disc Check Valve
- Hydraulic Valve
- Fixed Cone Valve
- Plunger Valve
- Hydraulic Control Valve
- Air Vent Valve
- Hydraulic Check Valve
- Plug Valve
- Sleeve Plug Valve
- Lubricated Plug Valve
- Orbit Plug Valve
- Marine Valve
- JIS Marine Valves
- Actuators
- Pneumatic Actuator
- Electric Actuator
- Hydraulic Actuator
- Positioner
- Accessories
- Pipe Fitting
- Joints
- Flanges
- Strainer
-
Applications
- Water treatment
- Oil and Gas
- Chemical and Petrochemical
- Mining and Metallaurgy
- Food and Beverage
- Slurry and Paper
- Power Generation
- Marines and Offshore
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Resources
- Literature Download
- News Center
Power generation facilities incorporate valves in virtually every system where fluid control is required. These applications can be broadly categorized based on their function and operating environment:
Boiler Feedwater Systems: Controlling the flow of high-purity water to steam generators with precise regulation capabilities.
Steam Distribution Networks: Managing high-temperature, high-pressure steam flows to turbines and auxiliary systems.
Cooling Water Circuits: Regulating cooling media for condensers, heat exchangers, and other cooling applications.
Fuel Supply Lines: Controlling the flow of oil, gas, or other fuels to combustion systems.
Emission Control Systems: Managing flue gas and treatment chemicals in environmental control applications.
Auxiliary and Service Systems: Handling compressed air, water treatment chemicals, and other support media.
Valves in Power Plants
Factors Influencing Valve Selection
Choosing the correct valve for a specific power generation application requires careful consideration of multiple factors:
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Service Conditions: Temperature, pressure, and cycle frequency of the application
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Media Characteristics: Corrosiveness, abrasiveness, viscosity, and phase (liquid, gas, slurry)
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Performance Requirements: Leakage class, flow characteristics, and actuation speed
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Safety Considerations: Fail-safe requirements, fire-safe design, and seismic qualifications
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Lifecycle Costs: Initial investment, maintenance requirements, and expected service life
Application-Specific Recommendations
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Main Steam Lines: Triple offset butterfly valves or gate valves with appropriate pressure-temperature ratings
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Boiler Feedwater: Globe valves for precise control or check valves for backflow prevention
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Cooling Water Systems: Resilient seated butterfly valves or ball valves for economical, reliable operation
Power generation valves operate in some of the most challenging environments in industrial applications. Shield engineers valves with materials specifically selected for:
High-Temperature Resistance: Specialized alloys capable of withstanding temperatures exceeding 1000°F (538°C) in supercritical steam applications.
Pressure Integrity: Materials and designs tested to withstand pressure extremes from vacuum conditions to over 5000 psi.
Corrosion Resistance: Selection of stainless steels, duplex alloys, and specialized coatings for corrosive media including flue gas condensates and chemical treatment systems.
Thermal Cycling Capability: Designs that accommodate repeated thermal expansion and contraction without compromising sealing integrity.
Material Selection for Extreme Conditions
Specialized Valve for Power Applications
In the complex ecosystem of power generation, valves serve as critical control elements whose performance directly impacts plant safety, efficiency, and reliability. The demanding conditions of temperature, pressure, and media in power applications require specialized valve solutions engineered for specific services. Shield Eng. and Tech. Co. Ltd. combines 25 years of manufacturing expertise with a comprehensive understanding of power generation requirements to provide valve solutions that meet these challenges.
Valves for power generation must meet rigorous industry standards and performance requirements:
Butterfly valves offer excellent shut-off capabilities with compact design advantages ideal for space-constrained power plant installations.
Ball valves provide excellent shut-off capabilities with quarter-turn operation for quick response.
Gate and Globe Valves for Flow Control.
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From conventional fossil fuel plants to nuclear facilities and renewable energy installations, each application presents unique challenges requiring specialized valve engineering.
Critical Applications of Valves in Power Plants
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Understanding that standard solutions don't always address unique challenges, Shield's engineering team works closely with power generation clients to develop customized valve solutions for specific applications. Our technical support extends from the initial design phase through installation and commissioning, ensuring optimal performance in the intended application.
Technical Considerations for Power Generation Valves
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With products successfully implemented in over 40 countries and regions worldwide, Shield valves have proven their reliability across diverse operating environments and applications. This global experience informs our product designs and manufacturing processes, resulting in valves that deliver consistent performance regardless of geographic location or specific operating conditions.
Global Experience and Reliability
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┃Power Generation
Shield's Valves serve as critical control points within power generation systems, regulating the flow of water, steam, gases, and other media across various processes.
Selection Guidelines for Power Generation Valves
Related Valves for Power Generation
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Full Welded Ball Valve
Fully Welded Ball Valves are precision-engineered components designed for reliable fluid control in demanding pipeline applications. Their fully welded structure ensures exceptional strength and a zero leakage performance, making them a superior choice for industries where safety and durability are critical.¥ 0.00Buy now
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Forged Check Valve
In high-pressure and critical service applications across the oil and gas, power generation, and chemical processing industries, valve failure is not an option. This is where the superior strength and reliability of forged check valves become essential. Unlike their cast counterparts, these valves are manufactured from forged steel or stainless steel forged billets, undergoing a process that compacts the metal grain structure. The result is a component with exceptional mechanical properties, ide¥ 0.00Buy now
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Swing Check Valve
A disc check valve is a family of automatic valves that uses a swinging, tilting, or lifting disc to control flow direction. The core principle is simple: forward flow pressure pushes the check valve disc off its seat, allowing media to pass. When flow stops or reverses, the disc is forced back onto the check valve seat, creating a tight seal to prevent backflow. This mechanism protects crucial equipment like pumps and compressors.¥ 0.00Buy now
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Lift Check Valve
In the vast landscape of industrial valves, ensuring unidirectional flow and preventing backflow is critical for system safety and efficiency. Among the various check valve types, the lift check valve stands out for its robust design and dependable performance in challenging applications.¥ 0.00Buy now
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Casting Steel Globe Valve
In the world of industrial flow control, Cast Steel Globe Valves stand as a critical component for reliable shut-off and regulation services. Engineered to handle high-pressure and high-temperature media, these robust valves are the preferred choice across sectors like oil and gas, petrochemicals, power generation, and steam systems. Our company specializes in manufacturing premium-grade cast steel globe valves that meet and exceed stringent international standards, ensuring durability, safety,¥ 0.00Buy now
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