Two-Piece Trunnion Ball Valve

Product Overview

The Two-Piece Trunnion Ball Valve is designed for demanding pipeline applications that require reliable sealing, stable operation, and low operating torque under medium- and high-pressure conditions.

Unlike floating ball valves, the ball in a trunnion-mounted ball valve is mechanically supported by upper and lower trunnions, allowing the seats to move toward the ball for sealing. This structure reduces seat load, improves operating stability, and makes the valve suitable for larger sizes, higher pressure ratings, and more demanding industrial service.

Raymon Two-Piece Trunnion Ball Valves are commonly used in oil and gas pipelines, natural gas transmission, petrochemical plants, power plants, and other industrial systems requiring dependable shut-off performance.

Key Features

• Two-piece body construction for strong and stable valve structure
• Trunnion-mounted ball design for reduced operating torque
• Suitable for medium- and high-pressure pipeline systems
• Spring-loaded seats for reliable sealing performance
• Double block and bleed configuration available
• Anti-static and fire-safe design options available
• Available in flanged, butt weld, and customized end connections
• Manual, gear-operated, pneumatic, electric, and hydraulic operation options
• Suitable for large-size and high-pressure industrial applications

Technical Specifications

Product Type: Two-Piece Trunnion Ball Valve
Valve Design: Two-piece body, trunnion-mounted ball, soft seated or metal seated
Nominal Size: DN50–DN1200 / 2″–48″
Pressure Rating: Class 150, Class 300, Class 600, Class 900, Class 1500, PN16, PN25, PN40, PN64, PN100
Body Material: WCB, LCB, WC6, WC9, CF8, CF8M, Duplex Stainless Steel
Ball Material: A105 + ENP, F304, F316, F51, F53
Stem Material: 13Cr, F304, F316, Duplex Stainless Steel
Seat Material: PTFE, RPTFE, NYLON, PEEK, PPL, Metal Seat
End Connection: Flanged, Butt Weld, RTJ Flanged, Customized Ends
Operation: Gear Operator, Pneumatic Actuator, Electric Actuator, Hydraulic Actuator
Design Standard: API 6D, API 608, ISO 17292
Testing Standard: API 598, API 6D
Applicable Media: Oil, Natural Gas, Water, Steam, Petrochemical Fluids, Industrial Gas

Structural Design

The trunnion-mounted structure supports the ball from both the top and bottom, preventing the ball from moving freely under line pressure. This allows the valve seats to move toward the ball to create sealing contact.

Compared with floating ball valves, this design helps reduce operating torque and seat wear, especially in larger sizes and higher pressure ratings. For pipeline applications where frequent operation, high pressure, or larger diameters are involved, trunnion ball valves provide better mechanical stability and more reliable long-term performance.

Typical Applications

• Oil and gas transmission pipelines
• Natural gas processing plants
• Petrochemical process systems
• Refinery units
• Power plant pipelines
• High-pressure water systems
• Industrial gas systems
• Long-distance pipeline isolation

Why Choose Raymon

Raymon provides trunnion-mounted ball valve solutions for demanding industrial and pipeline applications. Our Two-Piece Trunnion Ball Valves are available in a wide range of pressure classes, body materials, seat materials, end connections, and operation options.

We support customized valve selection based on pressure rating, pipeline size, medium, temperature, sealing requirement, operation method, and project standard. For oil and gas, petrochemical, power, and high-pressure industrial systems, Raymon can help provide suitable valve configurations according to actual working conditions.

FAQ

Q1: What is a Two-Piece Trunnion Ball Valve?
A: A Two-Piece Trunnion Ball Valve is a ball valve with a two-piece body and a trunnion-mounted ball design. The ball is supported by upper and lower trunnions, making it suitable for larger sizes and higher pressure applications.

Q2: What is the difference between floating ball and trunnion ball valve?
A: In a floating ball valve, the ball moves slightly under pressure to seal against the downstream seat. In a trunnion ball valve, the ball is fixed and supported by trunnions, while the seats move toward the ball for sealing.

Q3: Is this valve suitable for high-pressure applications?
A: Yes. Trunnion-mounted ball valves are commonly used in medium- and high-pressure pipeline systems, including Class 300, Class 600, Class 900, and higher pressure ratings.

Q4: Can this valve be automated?
A: Yes. It can be supplied with gear operator, pneumatic actuator, electric actuator, hydraulic actuator, or gas-over-oil actuator package.