Trunnion Mounted Ball Valve
Quick Advantages
Why Choose Trunnion Mounted Ball Valves
Designed for high pressure, large size, and demanding pipeline service where lower operating torque, better stability under pressure, and dependable shut-off performance are required.
Lower Operating Torque
The trunnion-supported ball structure helps reduce operating torque, especially in higher pressure service and larger valve sizes.
Better Stability Under Pressure
A mechanically supported ball design improves stability and helps maintain reliable sealing performance under demanding pressure conditions.
Suitable for Large Sizes
Trunnion mounted construction is widely used for medium and large diameter valves in transmission, terminal, and process pipeline systems.
Designed for Demanding Service
A practical choice for oil & gas, long-distance pipelines, petrochemical plants, and other severe industrial applications.
Overview
What Is a Trunnion Mounted Ball Valve?
A trunnion mounted ball valve is a quarter-turn valve in which the ball is mechanically anchored by upper and lower trunnion supports. Unlike a floating ball design, the ball remains fixed in position while the seats move toward the ball to create sealing.
This structure helps reduce operating torque, improve sealing stability under pressure, and make the valve more suitable for higher pressure ratings and larger diameters.
Because of these advantages, trunnion mounted ball valves are widely used in oil & gas, long-distance pipeline systems, petrochemical plants, and other demanding industrial services.
Trunnion Support
The ball is supported by dedicated upper and lower trunnion bearings for improved structural stability.
Stable Shut-Off
The fixed-ball structure helps maintain dependable sealing performance in higher pressure and larger size service.
High Pressure Ready
Designed for demanding applications where pressure capability, valve stability, and lower operating torque are important.
Configurations
Available Trunnion Mounted Ball Valve Configurations
We supply trunnion mounted ball valves in different body constructions, bore designs, and actuation options to match high pressure, large diameter, and demanding pipeline service requirements.
Two-Piece Trunnion Ball Valve
A robust construction suitable for high pressure industrial service and standard pipeline shut-off applications requiring stable performance.
Three-Piece Trunnion Ball Valve
Suitable for projects requiring more flexible maintenance access and convenient servicing of internal components.
Actuated Trunnion Ball Valve
Available with pneumatic, electric, or hydraulic operation for automated shut-off and remote-controlled service.
Full Bore Trunnion Ball Valve
Preferred for transmission pipeline systems where minimum pressure loss and pigging capability are important.
Key Features
Designed for High Pressure and Demanding Pipeline Service
Trunnion mounted ball valves combine lower operating torque, better structural stability, and dependable shut-off performance, making them suitable for large diameter, high pressure, and severe industrial service conditions.
Lower Operating Torque
The fixed-ball trunnion structure helps reduce torque demand, especially in higher pressure applications and larger valve sizes.
Better Stability Under Pressure
Mechanical support at the top and bottom of the ball improves structural stability and sealing performance under demanding pressure conditions.
Reliable Shut-Off Performance
Designed to provide dependable isolation in demanding pipeline systems where pressure stability and sealing reliability are critical.
Suitable for Large Sizes
A preferred design for medium and large diameter valves used in transmission, terminal, and industrial process systems.
Heavy-Duty Construction
Robust body design and internal support structure make the valve suitable for severe service and long-term operation.
Flexible Actuation Options
Available with gear, pneumatic, electric, or hydraulic operation to match project control and torque requirements.
Technical Specifications
Technical Specifications
Standard ranges can be adjusted according to project requirements, pressure class, media conditions, and applicable pipeline standards.
Selection Overview
Trunnion mounted ball valves are typically selected for high pressure, large diameter, and demanding service conditions where lower operating torque, stable shut-off performance, and strong structural support are required.
- Typical Applications
Oil & gas, long-distance pipelines, petrochemical systems, terminals, tank farms, and demanding industrial process service.
- Available Configurations
Two-piece, three-piece, full bore, reduced bore, and actuated trunnion mounted ball valve options.
- Custom Support
Materials, pressure class, end connection, and actuation packages can be matched to project requirements.
Item
Specification
Valve Type
Trunnion Mounted Ball Valve
Size Range
DN50–DN1200
Pressure Rating
Class 150–2500 / PN16–PN420
Body Material
WCB, LCB, CF8, CF8M, Duplex Stainless Steel
Ball Material
Stainless Steel, CF8M, Duplex Stainless Steel
Seat Material
RPTFE, Nylon, PEEK, Metal Seat
Stem Material
Stainless Steel / High Strength Alloy Steel
Operation
Gear, Pneumatic, Electric, Hydraulic
End Connection
Flanged, Butt Weld, RTJ, Custom Pipeline Ends
Applicable Media
Natural Gas, Crude Oil, Refined Products, Petrochemical Media, Industrial Fluids
Temperature Range
According to body material, seat type, and service condition
Standards
API, ASME, ANSI, ISO, DIN, BS
Custom sizes, pressure classes, material combinations, and actuator packages are available upon request. Final specifications should be confirmed according to actual working conditions and project requirements.
Materials & Seat Options
Material Choices for High Pressure and Demanding Service
Different material combinations help balance sealing reliability, pressure resistance, corrosion performance, and service life for demanding pipeline and industrial applications.
Seat Materials
Seat material directly affects shut-off performance, pressure capability, temperature resistance, and long-term service reliability. Different seat options should be selected according to medium type, pressure condition, and project requirements.
EPDM Seat
Suitable for general high pressure service requiring improved strength and stable sealing performance.
Nylon Seat
Used in selected service conditions where wear resistance and pressure capability are important.
PEEK Seat
A stronger engineering material option for more demanding pressure and temperature conditions.
Metal Seat
Preferred for severe service involving higher temperature, abrasion, or more demanding shut-off conditions.
Body Materials
Body materials are selected according to pressure class, service environment, corrosion allowance, and project standard. Carbon steel, stainless steel, and duplex materials are commonly used for demanding service.
Ball Materials
Ball material affects sealing reliability, corrosion resistance, and long-term durability. Stainless steel and higher-grade alloy materials are commonly selected for demanding pressure and service conditions.
Applications
Typical Applications
Trunnion mounted ball valves are widely used in high pressure and demanding systems where reliable shut-off, lower operating torque, and stable performance in larger sizes are required.
Oil & Gas Pipeline Service
Trunnion mounted ball valves are commonly used in oil and gas transmission systems, gathering lines, and terminal facilities because they provide dependable shut-off, better pressure stability, and practical operation in medium to large diameter pipelines.
Long-Distance Pipelines
Suitable for transmission pipeline systems where high pressure capability, reliable isolation, and low operating torque are important.
Petrochemical Plants
Applied in refining and petrochemical units where valves must perform reliably under demanding pressure, temperature, and media conditions.
Tank Farms & Terminals
Used in storage, loading, and transfer systems requiring dependable shut-off and stable valve performance in critical service lines.
General Heavy Industrial Service
Also suitable for demanding industrial pipeline service where larger size, stronger structure, and longer service reliability are required.
Application suitability depends on pressure class, temperature, media properties, valve size, and seat/material selection. Customized recommendations can be provided for project-specific requirements.
Actuation Options
Operation and Actuation Options
Trunnion mounted ball valves can be supplied with manual or automated operation to match different torque requirements, control methods, installation environments, and project specifications.
The right actuation method depends on valve size, pressure level, operating frequency, pipeline location, and whether local or remote operation is required.
- Manual or Automated
Available for basic shut-off service, frequent operation, or integration into plant and pipeline control systems.
- Project-Based Selection
Actuation solutions can be matched according to valve size, torque requirement, pressure class, and service condition.
- Flexible Supply Scope
Complete valve and actuator assemblies can be supplied for easier installation, commissioning, and project integration.
Lever Operated
Suitable for smaller sizes and lower torque applications where simple manual shut-off is required.
Gear Operated
Recommended for medium and large sizes where smoother manual operation and reduced operating effort are important.
Pneumatic Actuated
Suitable for fast automated opening and closing in industrial and pipeline systems where responsive shut-off is required.
Electric Actuated
Ideal for remote operation, automated process control, and installations requiring stable motorized valve actuation.
Actuation options can be configured according to valve size, torque requirement, control method, installation condition, and project specification.
Why Choose Raymon Valve
Project-Based Configuration
Body material, seat type, end connection, pressure class, and actuation options can be matched to project requirements.
Standards Support
Suitable for common international valve standards and project specification requirements for demanding pipeline and industrial service.
Documentation Support
Basic technical files, inspection documents, and product-related records can be provided upon request.
Fast Response
Quick follow-up for RFQ, configuration discussion, selection questions, and trunnion ball valve inquiry requirements.
Featured Products
Featured Trunnion Mounted Ball Valve Products
Explore selected trunnion mounted ball valve models for different pressure classes, body constructions, and demanding service requirements.
Flanged Trunnion Ball Valve
Suitable for industrial pipeline systems requiring standard flange connection and stable shut-off performance under demanding service conditions.
Full Bore Trunnion Ball Valve
Preferred for transmission pipeline service where minimum pressure loss and pigging compatibility are important.
Metal Seated Trunnion Ball Valve
Designed for severe service involving higher temperature, abrasion, or more demanding shut-off conditions.
Actuated Trunnion Ball Valve
Available with pneumatic, electric, or hydraulic actuation for automated and remote-controlled service.
FAQ
Frequently Asked Questions
Common questions about trunnion mounted ball valve structure, pressure capability, material options, and application.
What is the difference between a trunnion mounted ball valve and a floating ball valve?
A trunnion mounted ball valve uses a mechanically supported ball structure, while a floating ball valve relies on line pressure to move the ball against the seat. Trunnion designs are generally preferred for higher pressure, larger sizes, and more demanding service conditions.
Why is a trunnion mounted ball valve suitable for high pressure service?
Because the ball is mechanically supported, the valve offers better structural stability, lower operating torque, and more dependable shut-off performance under higher pressure conditions.
Are trunnion mounted ball valves suitable for large diameter pipelines?
Yes. Trunnion mounted construction is widely used for medium and large diameter pipeline systems where stable shut-off, lower operating torque, and full bore design are important.
What seat materials are available for trunnion mounted ball valves?
Common seat materials include RPTFE, Nylon, PEEK, and metal seat options. The correct seat material depends on pressure, temperature, medium type, and shut-off requirement.
Can trunnion mounted ball valves be supplied with actuators?
Yes. They can be supplied with gear, pneumatic, electric, or hydraulic operation depending on torque requirement, control mode, and project specification.
Where are trunnion mounted ball valves commonly used?
They are widely used in oil & gas, long-distance pipelines, petrochemical plants, terminals, tank farms, and other demanding industrial services requiring reliable shut-off performance.