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English Views: 2 Author: Site Editor Publish Time: 2025-11-14 Origin: Site
Electric flanged ball valves are essential for precise and reliable flow control in industries from chemical processing and oil & gas to water treatment and power generation. Selecting the right valve can significantly impact system efficiency, safety, and maintenance costs. This guide walks you through the key factors to help you make an informed decision.
Pressure rating is one of the first considerations. Ensure the valve can handle your system's maximum operating pressure:
· Low-pressure systems: Standard cast stainless steel or carbon steel valves are sufficient.
· Medium to high-pressure systems: Forged or thick-walled bodies offer extra safety.
· Critical or continuous-duty systems: Forged steel valves with fire-safe and anti-blowout stem designs provide long-term reliability.
Tips: Always select a valve with a pressure rating at or above your system requirements to prevent leaks or failures.
Valve body material defines durability, corrosion resistance, and service life. Common options include:
| Material | Corrosion Resistance | Typical Applications |
| Stainless Steel (304/316/316L) | ★★★★☆ | Water, oil, gas, steam, food & beverage, pharmaceuticals, light chemicals, seawater |
| Carbon Steel (WCB, A105) | ★★☆☆☆ | Oil & gas, petrochemical, power generation, high-pressure non-corrosive media |
| Duplex Stainless Steel | ★★★★★ | Offshore, marine, seawater desalination, chemical plants |
| Alloy Steel | ★★★☆☆ | Steam pipelines, power plants, high-temperature industrial systems |
Tips: For corrosive or seawater applications, stainless or duplex stainless steel is preferred. For high-pressure non-corrosive fluids, carbon steel is cost-effective.
Valve seats are key to sealing and smooth operation. Choose based on fluid type, temperature, and pressure.
| Seat Material | Temperature Range | Pressure Resistance | Corrosion Resistance | Common Applications |
| PTFE | -20°C to 150°C | ★★★★★ | Chemical, Pharmaceutical, Petrochemical | |
| RPTFE | Up to 180°C | ★★★★ | Chemical, Petrochemical, Industrial | |
| PPL | Up to 230°C | ★★★★ | Steam Systems, High-Temperature Processes | |
| PEEK | Up to 250°C | High Pressure | ★★★ | Aerospace, Oil & Gas, High-Pressure Systems |
| TFM | TFM1600: -100°C to 160°C | ★★★★★ | LNG, Cryogenic Systems, Low-Temperature Gas | |
| PCTFE | Down to -190°C | ★★★★ | Cryogenic Systems, LNG, Low-Temperature Transport | |
| Alloys (304/316/Titanium) | Up to 500°C | High Pressure | ★★★ | Cement, Mining, Abrasive Processes |
| Ceramics | Extremely High Temperatures | ★★★★★ | Metal Processing, Incinerators, High-Temperature Applications |
Tips: For corrosive or low-temperature fluids, PTFE, TFM, or PCTFE seats are ideal. For high-temperature or high-pressure service, PEEK or metal seats deliver reliable performance.
The actuator controls flow and enables integration with automated systems. Consider:
· Torque: Must match valve size and pressure.
· Voltage: 24V, 110V, or 220V, matching your system supply.
· Control type:
· On/Off: Simple open-close operation.
· Modulating: Precise flow control with feedback.
· Smart/Intelligent type: Advanced features like remote monitoring, communication, self-diagnostics, often with modulating control.
· IP rating: IP68 for protection in outdoor or harsh environments.
Tips: A well-matched actuator ensures long service life, stable control, and reduced maintenance.
· Align flanges precisely before tightening bolts to avoid seat deformation.
· Ensure actuator wiring matches system specifications.
· Check torque settings and seals periodically to maintain performance.
Tips: Proper installation and routine checks help extend valve life and prevent leaks.
Why SLVCN?
With 30+ years of valve expertise, SLVCN offers electric flanged ball valves with PTFE-lined, V-type, and high-temp options. CE-certified, IP68 actuators and in-house testing ensure reliable, automation-ready valves for chemical, water, oil, gas, and power systems.
