KOSO 520C 530C Top and Bottom Guided Double Seated Globe Valves for Oil Gas Chemical Industry

The KOSO 520C and 530C are top-and-bottom guided double-seated globe control valves designed for precise flow regulation in high-pressure, high-temperature, and heavy-duty industrial processes. Featuring a balanced double-seat structure and stable guided motion, these valves deliver high flow capacity, low unbalanced force, and long service life under continuous operation. They are widely used for controlling liquids, gases, and steam in process industries requiring stable and reliable regulation.

• Top and bottom guided plug design: Minimizes vibration, ensures stable travel, and extends service life.
• Double-seated balanced structure: Reduces actuator force requirements and supports high differential pressure.
• High flow capacity: Larger flow coefficient than single-seated valves of the same nominal size.
• Wide temperature and pressure range: Suitable for high-temperature and high-pressure working conditions.
• Strong anti-vibration performance: Stable operation even in harsh process environments.
• Multiple trim materials and end connections: Flexible for various media and installation demands.

• Petroleum refining and petrochemical processing
• Chemical industry (acid, alkali, solvent medium control)
• Thermal power and cogeneration plants (steam, water control)
• Metallurgy, steel, and non-ferrous metal processes
• Oil and gas gathering and transportation systems
• Paper, food, and textile processing
• General industrial fluid control systems

• Q: What is the difference between 520C and 530C?
  A: They share the same guided double-seated core design. Differences lie in nominal pressure, body dimensions, flange standards, and applicable actuators. Please consult us for model selection.
• Q: Are these valves suitable for high differential pressure?
  A: Yes. The balanced double-seat structure greatly reduces unbalanced force, making them ideal for high differential pressure conditions.
• Q: Can they be used for high-temperature steam?
  A: Yes. With proper trim, packing, and body materials, they reliably control high-temperature steam up to 550°C.
• Q: Do you provide replacement parts and maintenance services?
  A: Yes. We supply original-equivalent trims, gaskets, packing, and actuators, plus full technical support.
• Q: Can you match other actuators or positioners?
  A: Yes. These valves are compatible with KOSO, Yamatake, Siemens, ABB, and other mainstream positioners and actuators.

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