Full Bore Trunnion Mounted Ball Valve

Full bore trunnion mounted ball valve is a kind of ball valve with eccentric ball design and trunnion drive as the core structure, its full bore flow path is the same as the inner diameter of the pipeline, which is suitable for high viscosity, containing particles or need to open and close the severe conditions quickly, widely used in petroleum, chemical, natural gas and other industries.

Structure

Core components:

• Trunnion and ball:

Trunnion for the eccentric shaft design, driven by the ball rotation to produce pre-displacement, reduce the sealing surface wear; ball surface mirror polishing, full bore design to ensure that the flow path without shrinkage.

• Valve body and seat:

The valve body is made of cast steel or stainless steel, and the internal channel is equal to the diameter of the pipeline; the valve seat is of floating design, and the seal is formed by pressing the ball through the spring or medium pressure.

• Driving device:

Trunnion external worm gear, pneumatic or electric actuator, support 90 ° rapid opening and closing.
Auxiliary structure:

• Fire and explosion-proof design: stem anti-disengagement structure, metal seal redundancy, adapt to high temperature and high pressure environment.
• Anti-static device: through the spring and ball contact with the export of static electricity, to avoid the explosion of dangerous media.

• Nominal diameter (DN): DN50～DN1200 (large mouth type), the full-through flow path is the same as the inner diameter of the pipe.
• Pressure Rating:
• Conventional models: Class150～Class900 (American Standard), PN16～PN40 (European Standard).
• High pressure customised: up to Class2500 (42MPa), suitable for deep well gas extraction or high pressure transmission.
• Connection: flange connection (standard or extended flange), clamping type or welding type.

 

GNEE Full Bore Trunnion Mounted Ball Valve

 

Features and Advantages

• Low flow resistance and high flow capacity: full bore design reduces medium resistance, close to the flow resistance coefficient of straight pipe, suitable for high flow scenarios.
• Wear-resistant and long life:

The ball and seat are coated with hard alloy or nickel-based alloy, which is resistant to the scouring of media containing particles and fibres.
Eccentric trunnion structure reduces opening and closing friction, sealing surface life is increased by more than 30%.

• Reliable sealing:

Double sealing surface (metal/soft seal) design, to achieve zero leakage, vacuum system is applicable.
Floating seat compensation structure, automatically adapt to the deformation caused by temperature or pressure changes.

• Convenient operation:

90 ° rotation opening and closing, low torque (only 60% of ordinary ball valves), support for remote automation control.

Applications

• Oil & Gas:

Oil well gas extraction system, long-distance pipeline high-pressure cut-off, sulfur-containing natural gas control.

• Chemical & Pharmaceutical:

High-viscosity resin, catalyst-containing slurry, corrosive acid and alkali media transport.

• Metallurgy and Electricity:

High-temperature steam pipeline, coal dust and ash treatment, circulating water system.

• Environmental protection and municipal:

Wastewater treatment containing solid particles, sludge conveying pipeline

• Media Adaptability: The only valve type that can simultaneously address high viscosity, particulate and high pressure sealing needs, avoiding media crystallisation or clogging.
• Economy: full bore design reduces pumping energy consumption, lower maintenance costs than gate or globe valves.
• Safety: fire, explosion and anti-static design in line with API 607/6FA and other demanding standards.

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