Trunnion Ball Valve

Valvesonly is the best Trunnion Ball valve manufacturer in USA. A trunnion ball valve is a type of industrial valve designed for fluid control applications, particularly in high-pressure and high-temperature environments. The key distinguishing feature of a trunnion ball valve is its utilization of a trunnion-mounted ball for effective sealing and control of the flow. The valve comprises a hollow, perforated sphere (the ball) with a through-hole, also known as the bore, which aligns with the pipe axis when the valve is in the open position. The ball is supported by trunnions, which are small shafts that extend outward from the sides of the ball, providing stability and control during operation.

How does a Trunnion Ball valve operate?

In operation, the trunnion ball valve allows for precise regulation of fluid flow by rotating the ball either perpendicular or parallel to the pipe axis. When the ball is rotated perpendicular to the flow direction, the valve is closed, and when it is parallel, the valve is open. This design ensures a reliable and tight seal, even in high-pressure conditions, as the trunnion-mounted ball remains anchored in place by the trunnions, preventing excessive wear and reducing the risk of leakage. Trunnion ball valves find extensive use in industries such as oil and gas, petrochemical, power generation, and process manufacturing, where they play a crucial role in controlling the flow of various fluids, including liquids and gases, with enhanced efficiency and durability.


  • Trunnion ball valves are designed to handle high-pressure and high-temperature environments with ease.
  • The trunnion-mounted design minimizes friction between the ball and the valve seats. This reduced friction results in less wear and tear on the sealing surfaces, leading to extended valve life and improved durability.
  • They provide excellent sealing performance due to the secure anchoring of the ball by the trunnions.
  • They are versatile and can handle a wide range of fluids, including corrosive and abrasive substances.
  • Trunnion ball valves are generally designed for ease of operation. The 90-degree rotation of the ball from the fully open to the fully closed position allows for quick and efficient control of fluid flow.
  • Many trunnion ball valves are designed with fire-safe features, ensuring their performance and integrity even in the presence of fire.


  • Oil and Gas
  • Petrochemical
  • Chemical Processing
  • Power Generation
  • Water Treatment
  • Pulp and Paper
  • Mining
  • Process Manufacturing
  • Pipeline Transmission
  • Aerospace
  • Marine and Offshore
  • Construction and Infrastructure


  • Available Materials: F304L, A105, A182 F304, F316, F51, F316L, F53, A350 LF2, LF3, Inconel, Monel, Hastelloy(Forging), A351 CF3, A351 CF8, A216 WCB, A351 CF3M, A351 CF8M, A890 4A/ 5A, A352 LCC/ LCB (Casting)
  • Class: 150-2500, PN25 – PN450.
  • Size: 2” to 48”.
  • Ends: Buttweld, Socket weld, Threaded, Flanged
  • Operations: Handwheel Operated, Gear Operated, Electric Actuated, Pneumatic Operated.


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    Casting Trunnion Ball Valve

    Casting Trunnion Ball Valve Body: ASTM A216 WCB, ASTM A351 CF8, ASTM A351 CF8M Stem: ASTM A182 F304, ASTM A182 F316 Ball: ASTM A182 F304, ASTM A182 F316 Seat: PTFE End Connections: RF, RTJ, BW Operation: Manual, Gear Operated, Electric Actuated Nominal Size: DN100 to DN700 Nominal Pressure: Class150 to Class2500, PN1.6 to PN10.0 Temperature […]

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    Forged Trunnion Ball Valve

    Forged Trunnion Ball Valve Body: ASTM A105, A182 304, A182 316, A182 304L, A182 316L, A182 F51, A182 F53 Bonnet: WCB, LCB, LCC, WC1, WC6, WC9, C5, C12, CF8, CF8M, CF3 and CF3M Ball: ASTM A105, A182 304, A182 316, A182 304L, A182 316L, A182 F51, A182 F53 Seat: PTFE, RTFE, Nylon, Metal to Metal […]