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Home > Industrial Equipment & Components > Valve > Ball Valve > Forged Steel Trunnion Mounted Ball Valve, API 6D Standard, Extended Stem for Buried Service

Forged Steel Trunnion Mounted Ball Valve, API 6D Standard, Extended Stem for Buried Service

Forged Steel Trunnion Mounted Ball Valve, API 6D Standard, Extended Stem for Buried Service thumbnail-3

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Product Spotlights

Forged steel construction ensures high strength & durability. API 6D standard guarantees pipeline valve reliability & interchangeability. Trunnion mounted design reduces torque & wear for longer life. Extended stem enables easy operation of buried valves without excavation. Suitable for high-pressure oil & gas, water, and industrial buried services. Customizable in size, pressure, stem length, and seat materials.

Negotiable MOQ: 1 Unit (Price negotiable depending on order volume and customization)

Key Specifications

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Material:

Other, Forged Steel

Standard:

API 6D

Application:

Other, Oil & Gas Pipeline

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Shanghai Zhibang Valve Manufacture Co.,ltd

1Yr

Payment & Shipping

Payment Methods:

Port of Shipment:

China

Delivery Detail:

Delivery time depends on order quantity.

Product Details
Company Profile
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Material Other, Forged Steel

Standard API 6D

Application Other, Oil & Gas Pipeline

Stem Design Extended Stem for Buried Service

Mounting Type Trunnion Mounted

Port Size Customizable

Pressure Rating Available upon request

Temperature Rating Available upon request

End Connection Flanged

Operation Manual or Gear

Shanghai Zhibang Valve Manufacture Co., Ltd., established in 2016 and certified with ISO9001, specializes in producing high-performance industrial valves for demanding applications worldwide. Our Forged Steel Trunnion Mounted Ball Valve, API 6D Standard, Extended Stem for Buried Service represents our commitment to engineering robust solutions for critical pipeline and industrial systems. This valve is designed to deliver reliable shut-off in harsh environments, particularly for buried or underground services, ensuring long-term operational integrity and safety.

The core value of this valve lies in its combination of superior forged steel construction, the stringent API 6D standard for pipeline valves, and a specialized extended stem design. This trio of features addresses the primary challenges in oil & gas transmission, water distribution, and industrial process lines where valves are installed below ground. It offers exceptional strength, leak-proof performance, and ease of operation even when buried, minimizing maintenance interventions and lifecycle costs for our clients across North America, South America, Europe, Asia, Africa, and Oceania.

Detailed Product Features & Technical Specifications:

Forged Steel Body & Components: Manufactured from high-grade forged steel, the valve body, ball, and trunnion mounts exhibit superior mechanical strength, impact resistance, and durability compared to cast alternatives. This material choice ensures performance under high pressure and temperature fluctuations.
API 6D Standard Compliance: Designed and manufactured in accordance with API 6D specifications for pipeline and piping valves. This standard governs dimensions, design, materials, testing, and marking, ensuring interchangeability, reliability, and suitability for hydrocarbon service.
Trunnion Mounted Ball Design: The ball is supported by trunnions (stem extensions) at the top and bottom, which absorb the operating loads. This design reduces torque, minimizes seat wear, and prevents the ball from floating under pressure, leading to smoother operation, longer service life, and reliable sealing in both open and closed positions.
Extended Stem for Buried Service: A key feature for underground installation. The stem is extended to reach above ground level, allowing for easy manual or actuator operation without excavating the valve. The extension is typically protected by a stem sleeve or enclosure.
Robust Sealing System: Utilizes advanced seat materials (such as reinforced PTFE, nylon, or metal) suitable for the service media. The trunnion design ensures even seat loading, enhancing seal integrity and providing bi-directional sealing capability.
Fire Safe Design Option: Many models can be configured with fire-safe features, where secondary metal seals engage in case of primary seal failure due to high temperature, a critical requirement in many oil & gas applications.
Anti-Blowout Stem Design: The stem is designed to prevent ejection under pressure, adding a layer of safety for operators and the system.
Full Port or Standard Port: Available in full port (full bore) design for minimal flow restriction and reduced pressure drop, or standard port for general applications. Selection depends on pipeline requirements.
End Connections: Typically furnished with flanged ends (RF or RTJ) per ANSI/ASME standards, facilitating secure connection to piping. Other end types are customizable.
Operation Options: Can be operated manually via a handwheel, lever, or through a gearbox for high-torque applications. It is also readily adaptable for actuation (electric, pneumatic, hydraulic) for remote or automated control.

Primary Technical Parameters Table:

Parameter	Typical Specification / Range
Body Material	A105 Forged Steel, other forged grades available
Pressure Rating	ASME Class 150, 300, 600, 900, 1500, 2500 (customizable)
Temperature Range	Standard: -20°C to +200°C; Extended ranges available
Size Range (Nominal)	From 2" (DN50) to 48" (DN1200) or larger
Seat Material Options	PTFE, Reinforced PTFE, Nylon, Metal (SS, etc.)
Stem Extension Length	Customizable based on burial depth requirement
Testing Standard	API 6D, includes shell test, seat test, etc.

Advantages & Client Benefits:

Enhanced Durability & Lifecycle: The forged steel construction and trunnion design significantly reduce wear, leading to a longer operational life and reduced frequency of replacement, lowering total cost of ownership.
Operational Safety & Reliability: Compliance with API 6D and features like anti-blowout stem and fire-safe options ensure the valve meets industry safety standards, protecting assets and personnel.
Cost-Effective Maintenance for Buried Lines: The extended stem eliminates the need for costly excavation to operate or maintain the valve, saving time and labor expenses over the system's lifetime.
High Performance Under Pressure: Suitable for high-pressure pipeline applications common in oil & gas, chemical, and power industries, providing secure shut-off without leakage.
Global Compliance & Interchangeability: Adhering to API 6D ensures the valve is compatible with global pipeline specifications, facilitating easier integration into existing systems.
Customization Flexibility: As a manufacturer, we offer customization in size, pressure class, end connections, stem extension length, and seat materials to match specific project needs.

With an annual export value ranging between US$1 Million and US$1.5 Million, Shanghai Zhibang Valve has established a strong presence in markets across North America, South America, Eastern and Western Europe, Asia, Africa, and Oceania. Our ISO9001 certification underpins a consistent quality management system, ensuring every forged steel trunnion ball valve meets rigorous production and testing standards before shipment from major ports like Shanghai, Guangzhou, Hongkong, and Beijing. This valve is not just a product; it's a reliable component engineered for the longevity and safety of your critical buried infrastructure. We encourage you to contact us with your specific size, pressure, and service requirements to receive a tailored solution and technical support.

Frequently Asked Questions (FAQ):

Q: What is the main advantage of a trunnion mounted design over a floating ball design?
A: The trunnion mounted design supports the ball on fixed stems, which distributes operating forces, reduces operating torque, minimizes seat deformation and wear, and prevents ball movement under pressure. This results in easier operation, longer seal life, and better performance in high-pressure applications.
Q: Can this API 6D valve be used for services other than oil and gas?
A: Yes. While API 6D is a pipeline standard primarily for hydrocarbons, valves built to this standard are also suitable for other demanding applications such as high-pressure water transmission, chemical processing, and power plant services where robust construction and reliable sealing are required.
Q: How is the extended stem protected when the valve is buried?
A: The extended stem is typically enclosed within a protective sleeve or casing that extends from the valve body to above ground. This sleeve shields the stem from soil, moisture, and corrosion, and often includes a seal at the top to prevent ingress.
Q: What seat material is recommended for natural gas service?
A: For natural gas, PTFE or reinforced PTFE seats are commonly used due to their good sealing properties and compatibility. Metal seats may be specified for high-temperature or abrasive services. The choice depends on temperature, pressure, and gas composition.
Q: Is this valve fire-safe?
A: Fire-safe design is an available option. In such configurations, if the primary soft seal is compromised by fire, a secondary metal-to-metal seal engages to maintain a degree of shut-off, meeting industry fire safety requirements like API 607/6FA.
Q: What is the typical delivery time for a customized size?
A: Delivery time depends on the size, pressure class, and customization level. Standard sizes may have shorter lead times. As a manufacturer, we can provide estimated timelines upon receipt of your specific requirements.
Q: Can the valve be operated with an actuator?
A> Absolutely. The valve design is compatible with various actuators (electric, pneumatic, hydraulic). The extended stem can be adapted for actuator mounting, allowing for remote or automated control of buried valves.
Q: What testing is performed on the valve before shipment?
A> Each valve undergoes testing per API 6D requirements, which typically includes a hydrostatic shell test to verify body integrity, a seat leak test (both low pressure and high pressure) to confirm sealing performance, and other optional tests as specified.