Types of Power Station Valve

Power station valves include gate valves, globe valves, check valves, ball valves, and butterfly valves. Gate valves handle isolation, globe valves control flow, and check valves prevent backflow. Ball and butterfly valves serve specialized high-temperature or lightweight applications in power generation facilities.

Power Station Valve Types Explained

Each power station valve type serves specific functions based on design and operating requirements.

Valvole a saracinesca

Valvole a saracinesca provide on-off isolation in power station piping systems. A wedge or disc moves perpendicular to the flow path to start or stop flow. These valves work fully open or fully closed, not for throttling applications.

Two main designs serve power plants:

• Bolted bonnet gate valves: Work for pressures up to ANSI Class 600 with minimal pressure drop
• Pressure seal gate valves: Handle applications above 500 PSI where the seal tightens as internal pressure increases

GOWIN, a China power station gate valve supplier, manufactures wedge and parallel disc designs for hydroelectric and thermal power applications. These valves feature hard-faced seats and self-cleaning capability for extended service life.

Valvole a globo

Globe valves regulate flow in power generation systems. The globe-shaped disc moves up and down to control flow by changing the opening size around the seat. This design provides precise throttling that gate valves cannot match.

The simple construction makes maintenance easier than other control valve types. The flow path creates higher pressure drop than gate valves, which limits their use in maximum-flow applications.

Design options include:

• Bolted bonnet globe valves: For applications below 500 PSI
• Pressure seal globe valves: For higher pressures where the seal strengthens as pressure increases

Hard-faced discs, seat rings, and backseats resist erosion from high-velocity steam.

Valvole di ritegno

Valvole di ritegno prevent backflow that could damage equipment or create dangerous conditions. These valves allow flow in one direction only, closing automatically when flow reverses.

Power plants use four main check valve designs:

• Swing check valves: Hinged disc swings open with forward flow and closes with reverse flow
• Tilt disc check valves: 45-degree angled disc reduces water hammer and handles high-velocity media
• Dual plate check valves: Spring-loaded plates respond faster than swing checks
• Nozzle check valves: Provide fastest response against backflow with minimal water hammer effects

Check valves need hard-seated surfaces and anti-corrosive bearings. Large diameter hinge pins absorb media movement without premature wear.

Ball and Butterfly Valves

Valvole a sfera use a spherical closure element that rotates 90 degrees between open and closed positions. Metal-seated ball valves withstand temperatures exceeding 1000°F and provide excellent bi-directional sealing.

Valvole a farfalla feature a thin disc that rotates within the valve body. Their lightweight construction makes installation and maintenance easier.

Three butterfly valve designs serve different needs:

• High-performance butterfly valves: Double-offset design creates better sealing and reduces friction
• Triple-offset butterfly valves: Third offset eliminates friction, providing gas-tight sealing for high-pressure service
• Resilient-seated butterfly valves: Rubber seats work in low-pressure, low-temperature applications

Power Station Valve Applications

Power plants classify valves by their function in the system.

Isolation and Shut-Off

Isolation valves stop media flow for maintenance, emergencies, or to direct flow through specific paths. Gate valves, ball valves, and butterfly valves commonly serve this function. These valves need tight shutoff capability and must handle full system pressure when closed.

Cast iron bodies work for most applications, with stainless steel stems resisting corrosion. Abrasive or corrosive slurries require easily replaceable discs and welded seat rings.

Flow Control in Power Plant Control Systems

Flow control valves regulate the rate, pressure, or temperature of media moving through the system. Globe valves and some ball valves provide the throttling capability needed for precise control.

Modern power plant control systems integrate these valves with automated actuators and sensors. The system monitors process variables and adjusts valve positions to maintain optimal conditions. Control valves must respond quickly while providing stable, repeatable positioning.

Safety and Backflow Prevention

Safety valves prevent over-pressurization that could damage equipment or endanger personnel. Check valves protect against backflow that could damage pumps or create hazardous conditions. These valves operate automatically without manual intervention.

Selection Your Power Station Valves

Choosing the right power station valve depends on operating conditions and sourcing considerations. Here’s the key selection criteria:

• Pressure and temperature: Applications above 500 PSI need pressure seal designs. High-temperature service above 1000°F requires metal-seated valves.
• Media characteristics: Abrasive slurries need hard-faced seating surfaces. Corrosive media require appropriate body and trim materials.
• Control integration: Automated systems need valves with actuator mounting provisions and position feedback capabilities.

Sourcing Power Station Valves

When sourcing valves for power generation projects, consider the supplier’s technical capabilities and service offerings.

Supplier options include:

• China electric power station valve manufacturer: Direct manufacturers provide technical specifications, custom material options, and quality certifications for large-scale projects.
• Electric power station valve ODM manufacturer: ODM providers design and manufacture custom valve solutions tailored to unique project specifications and operating conditions.
• Power station gate valve wholesaler: Wholesalers maintain inventory of standard configurations, offering faster delivery times and competitive pricing for routine replacements.

Match your supplier type to project requirements. Complex or high-specification projects benefit from working directly with manufacturers or ODM providers. Standard valve replacements work well through wholesalers who stock common sizes and ratings.

Valvola a saracinesca API 600

• Diametro nominale: 1″～42″（DN25~1050）
• Pressione: 150 libbre-2500 libbre 0,6 MPa-42,0 MPa
• Collegamento finale: RF, RTJ, BW, THR, SW
• Temperatura: -196℃-650℃

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Next Steps for Your Power Plant Project

Now that you understand the main valve types and their functions, review your system specifications. Check operating pressures, temperatures, and media characteristics to determine which valve type fits each application.If you need assistance with valve selection, GOWIN’s engineering team can help. Contattaci with your system requirements for valve recommendations tailored to your project.