High-Quality Cryogenic Trunnion Mounted DBB Ball Valve F316 - Gear Operated | China Suppliers & Factory Manufacturer, Factories

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√ Engineered with a cryogenic-ready extended stem, our valves ensure reliable sealing by keeping the packing away from extreme cold, making them ideal for China’s LNG and cryogenic applications.

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√ Featuring a trunnion-mounted DBB design, these valves significantly reduce torque and facilitate safe isolation even under high pressure, positioning us as a leading supplier in the market.

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√ With a variety of material options available, our valves provide exceptional strength, toughness, and corrosion resistance in cryogenic conditions, suitable for any factory setting.

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√ Our heavy-duty worm gear allows for smooth manual operation, essential for managing large, high-pressure valves effectively.

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√ Designed for dependable shut-off in LNG and cryogenic pipelines, our products ensure leak-free safety, affirming our commitment to quality as a premier supplier in China.

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Product Description

Key Product Features

Trunnion Mounted Ball Design

Protects upstream and downstream seats from excessive load for long service life.

Extended Stem with Cryogenic Neck

Prevents cold transfer to packing and actuator, and ensures stem retention under pressure with anti-blowout design.

Lip Seal Design

Enhances sealing reliability under extreme low temperatures for critical applications.

Worm Gear & ISO 5211 Mounting

Reduces operating torque for precise control; compatible with electric or pneumatic actuation upgrades.

Frequently Asked Questions

Q What is a trunnion mounted ball valve and why is it preferred for high-pressure applications?
A trunnion mounted ball valve features a ball that is mechanically anchored at both the top and bottom by a trunnion support, preventing the ball from shifting under high pressure. This design offloads the force from the seats, significantly reducing seat wear and extending service life — making it ideal for high-pressure and large-diameter pipeline applications.
Q How does the extended cryogenic neck stem protect the valve in low-temperature service?
The extended cryogenic neck creates a sufficient distance between the cold medium and the packing gland area, preventing the extreme cold from reaching the packing and actuator. This maintains packing flexibility and sealing effectiveness, while the anti-blowout stem design ensures the stem cannot be ejected under line pressure.
Q What temperatures can the lip seal design handle in cryogenic valve applications?
The lip seal design is engineered specifically for cryogenic service, capable of maintaining reliable sealing performance at extremely low temperatures, typically down to -196°C (-320°F) for LNG and liquid nitrogen applications. The geometry compensates for thermal contraction, ensuring consistent sealing integrity.
Q What is ISO 5211 mounting and how does it benefit valve actuation?
ISO 5211 is an international standard that defines the interface dimensions between a valve and its actuator. Valves with ISO 5211 compliant mounting pads allow for direct, standardized attachment of electric, pneumatic, or hydraulic actuators without the need for custom adapters.
Q Can the manual worm gear operator be replaced with an automated actuator in the field?
Yes. Thanks to the ISO 5211 standard mounting interface, the manual worm gear operator can be easily replaced with an electric or pneumatic actuator in the field. This modularity allows operators to automate valves as process requirements evolve without replacing the entire valve assembly.
Q What industries typically use cryogenic trunnion ball valves?
These valves are widely used in LNG (liquefied natural gas) terminals, liquid oxygen and nitrogen plants, air separation units, petrochemical processing facilities, and industrial gas storage systems where reliable shut-off of extremely cold media is required.

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