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General Purpose Ball Valve

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Top Mounted Trunnion Mounted Ball Valve Manufacturer

General Purpose Ball Valves are key components in industrial systems, offering reliable flow control for various fluids and gases. Designed to meet the demands of both low and high-pressure applications, these valves are widely used in industries such as chemical processing, water treatment, HVAC, and oil & gas. With a durable construction and simple design, they ensure long-lasting, trouble-free performance with minimal maintenance.

Operating with a rotating ball that controls flow, these valves are valued for their quick on/off function, ideal for applications with frequent cycle requirements. Available in various sizes, materials, and pressure ratings, they are customizable to fit specific needs. General Purpose Ball Valves are known for their corrosion-resistant materials and precise sealing, making them suitable for handling water, oil, and gases.

Manufactured to international standards such as ASME, ANSI, EN, BS, DIN, API, GB, and GOST, these valves are designed to withstand extreme conditions, with capabilities for high temperatures (up to 600°C), low temperatures (down to -196°C), and pressures up to 4500Lb. From track ball valves to fully welded and high-pressure variants, these versatile valves offer a reliable, cost-effective solution for a wide range of industrial applications.

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Zhejiang Naishi Valve Co., Ltd. specializes in the manufacturing of a comprehensive range of General Purpose Ball Valve and General Purpose Ball Valve factory, adhering to international standards such as ASME, ANSI, EN, BS, DIN, API, GB, and GOST. Our product dimensions span from DN10 to DN1600, encompassing a diverse portfolio that includes track ball valves, forged steel high-pressure gas ball valves, fully welded ball valves, floating ball valves, fixed ball valves, high-temperature wear-resistant ball valves, DBB double ball valves, and special stainless steel and high-nickel alloy ball valves. Our valves are designed to withstand a variety of conditions, including high temperatures up to 600°C, low temperatures as low as -196°C, and high pressures reaching 4500Lb, ensuring product reliability in the demanding environments.


Leveraging a well-trained team of professionals, solid technical expertise, an efficient management system, and meticulous production management, Naishi Valve is committed to delivering high-quality ball valve solutions for industries such as oil and gas transportation, urban heating, gas, petrochemicals, chemicals, energy, power stations, and metallurgy.
Zhejiang Naishi Valve Co., Ltd.

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A Comprehensive Guide to Top Mounted Trunnion Mounted Ball Valves by Zhejiang Naishi Valve Co., Ltd.

A Top Mounted Trunnion Mounted Ball Valve is engineered for high-pressure and large-diameter applications. Unlike conventional floating ball valves, it features a ball anchored at the top and bottom (trunnion support), reducing operating torque and providing superior stability. The top-mounted design allows direct actuator or gearbox installation, simplifying maintenance and enabling automated control in complex pipelines.

These valves ensure reliable sealing, minimal leakage, and long service life under extreme conditions, including high pressure, cryogenic temperatures, and abrasive fluids. At Naishi, advanced welding methods—manual, submerged arc, plasma, and fully automated—are used, with torque wrenches ensuring precise alignment during central bolt assembly.

Our experienced R&D team can develop customized solutions based on customer drawings or samples, reflecting our commitment to innovation and adaptability in valve manufacturing.

Key Benefits of Using a Top Mounted Trunnion Mounted Ball Valve

  • Reduced Operating Torque: The trunnion support minimizes the torque needed to operate the valve, making it easier to control manually or with an actuator.
  • High Pressure and Temperature Resistance: These valves are capable of handling high-pressure pipelines and extreme temperature conditions, ensuring safe and reliable operations.
  • Enhanced Sealing Performance: The design provides tight shutoff with minimal leakage, critical for oil, gas, and chemical industries.
  • Easy Maintenance: The top-mounted configuration allows quick access to internal components without removing the valve from the pipeline, reducing downtime and maintenance costs.
  • Automation Friendly: The structure supports direct actuator mounting, enabling integration with automated control systems for process optimization.
  • Durability and Longevity: Engineered with robust materials, top-mounted trunnion mounted valves offer superior wear resistance and extended service life.

Industries That Typically Use Top Mounted Trunnion Mounted Ball Valves

Due to their reliability and high-performance capabilities, top-mounted trunnion mounted ball valves are commonly used in industries that require precise flow control under demanding conditions:

  • Oil and Gas: Upstream, midstream, and downstream pipelines, including crude oil, natural gas, and refined products.
  • Petrochemical and Chemical: Handling corrosive or high-temperature chemicals where safety and sealing performance are critical.
  • Power Generation: High-pressure steam and cooling water pipelines in thermal and nuclear power plants.
  • Water Treatment and Utilities: Large-scale water and wastewater treatment plants requiring automated valve operation.
  • Marine and Shipbuilding: Fuel and ballast systems on ships, where space-saving and reliability are essential.

By choosing a Top Mounted Trunnion Mounted Ball Valve from Zhejiang Naishi Valve Co., Ltd., industries can ensure reliable flow control, minimize operational costs, and enhance safety even in the most demanding applications. Naishi’s precision engineering and robust manufacturing processes guarantee long-lasting performance and consistent efficiency across high-pressure and large-diameter pipelines.